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  • 对.NET中导出数据到EXCEL的几种方法探讨

    最近在做一个报表系统的时候，需要把DATASET中的数据导到EXCEL当中，于是在网上找了一遍，发现了好几种方法，本来以为应该差不多，但后来经过一一试用后，发现在性能上真的差别很大，现在就介绍一下，同时有不对的希望可以指正：
     
    1． 原理：利用office组件把dataset中的数据填充到excel文件当中。
    这里我不贴出全部代码了，只把关键部分贴出来：
             ///<summary>
             ///方法，导出C1TrueDBGrid中的数据到Excel文件
             ///</summary>
             ///<param name="c1grid">C1TrueDBGrid</param>
             ///<param name="FileName">Excel文件名</param>
             public void ExportToExcel(C1.Win.C1TrueDBGrid.C1TrueDBGrid c1grid,string FileName)
             {
                  if(FileName.Trim() == "") return;            //验证strFileName是否为空或值无效
     
                  int rowscount = c1grid.Splits[0].Rows.Count; //定义表格内数据的行数
                  int colscount = c1grid.Columns.Count;        //定义表格内数据的列数
     
                  //行数必须大于0
                  if (rowscount <= 0)
                  {
                       MessageBox.Show("没有数据可供保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                       return;
                  }
     
                  //列数必须大于0
                  if (colscount <= 0)
                  {
                       MessageBox.Show("没有数据可供保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                       return;
                  }
     
                  //行数不可以大于65536
                  if (rowscount > 65536)
                  {
                       MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                       return;
                  }
     
                  //列数不可以大于255
                  if (colscount > 255)
                  {
                       MessageBox.Show("数据记录行数太多，不能保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                       return;
                  }
            
                  //将文件保存到工作路径的子目录“/Excel”下，如果路径不存在创建它
                  string n_path = Directory.GetCurrentDirectory() + "//Excel";
                  if (Directory.Exists(n_path) == false)
                  {
                       Directory.CreateDirectory(n_path);
                  }
     
                  //验证以strFileName命名的文件是否存在，如果存在删除它
                  FileInfo fi = new FileInfo(n_path + "//" + FileName + ".xls");
                  if(fi.Exists)
                  {
                       try
                       {
                           fi.Delete();
                       }
                       catch(Exception fie)
                       {
                           MessageBox.Show(fie.Message,"删除失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                           return;
                       }
                  }
            
                  Excel.ApplicationClass excel = null;
     
                  try
                  {
                       //显示进度条
                       KP.PublicForm.ProgressBar pb = new PublicForm.ProgressBar("导出进度");
                       pb.Show();
                       pb.Refresh();
     
                      //新建Excel应用，新建Workbook文件
                       excel = new Excel.ApplicationClass ( ) ;
                       Excel.XlSaveAsAccessMode savemode = new Excel.XlSaveAsAccessMode();
                       excel.Application.Workbooks.Add (true) ;
     
                       //向Excel中写入表格的表头
                       int i = 1;
                       for(int c = 0;c < colscount; c++)
                       {
                           if(c1grid.Splits[0].DisplayColumns[c].Visible)
                           {
                                excel.Cells[1,i] = c1grid.Columns[c].Caption;
                                i++;
                           }
                       }
            
                       //向Excel中逐行逐列写入表格中的数据
                       for(int r = 0; r < rowscount; r++)
                       {
                           Application.DoEvents();
                           pb.SetProgressBarValue(r+1, rowscount);
                           if(pb.Cancel)
                           {
                                break;
                           }
     
                           int j = 1;
                           for(int c = 0;c < colscount; c++)
                           {
                                if(c1grid.Splits[0].DisplayColumns[c].Visible)
                                {
                                     excel.Cells[r + 2,j] = c1grid.Columns[c].CellText(r);
                                     j++;
                                }
                           }
                       }
     
                       //向Excel中写入表格的脚
                       if(c1grid.ColumnFooters)
                       {
                           int col = 1;
                           for(int c = 0;c < colscount; c++)
                           {
                                if(c1grid.Splits[0].DisplayColumns[c].Visible)
                                {
                                     if(c1grid.Columns[c].FooterText != null && c1grid.Columns[c].FooterText.Trim() != "")
                                     {
                                         excel.Cells[rowscount + 2,col] = c1grid.Columns[c].FooterText;
                                     }
                                     col++;
                                }
                           }
                       }
     
                       //关闭进度条
                       pb.Close();
     
                       //设置Excel的默认保存路径为当前路径下的Excel子文件夹
                       excel.DefaultFilePath = n_path;
     
                       //保存文件
                       excel.ActiveWorkbook.SaveAs(FileName + ".xls",excel.ActiveWorkbook.FileFormat,"","",excel.ActiveWorkbook.ReadOnlyRecommended,excel.ActiveWorkbook.CreateBackup,savemode,excel.ActiveWorkbook.ConflictResolution,false,"","");
            
                  }
                  catch(Exception e1)
                  {
                       MessageBox.Show(e1.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                       return;
                  }
                  finally
                  {
                       //关闭Excel应用
                       if(excel != null) excel.Quit();
                  }
                  MessageBox.Show(FileName + "导出完毕，在" + Application.StartupPath + "//Excel文件夹下","提示", MessageBoxButtons.OK,MessageBoxIcon.Information);
    //       }
     
    }
     
           总结：这个方法是可以解决问题，但效率最差，3000条长点的record就用了6分钟，晕~~~~
     
    2．   原理：利用office组件，同时把dataset的数据导到Clipboard中，然后通过粘贴到excel中。
             Excel.XlSaveAsAccessMode savemode = new Excel.XlSaveAsAccessMode();
                       xlApp.Application.Workbooks.Add (true) ;
                       xlApp.DefaultFilePath = @"c:/";
                       xlApp.ActiveWorkbook.SaveAs("exportExcel.xls",xlApp.ActiveWorkbook.FileFormat,"","",xlApp.ActiveWorkbook.ReadOnlyRecommended,xlApp.ActiveWorkbook.CreateBackup,savemode,xlApp.ActiveWorkbook.ConflictResolution,false,"","","");
            
                 
     
     
                       Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(filePath, oMissing, oMissing, oMissing, oMissing, oMissing,
                           oMissing, oMissing, oMissing, oMissing, oMissing, oMissing,
                           oMissing,oMissing,oMissing);
                      
                       Excel.Worksheet xlWorksheet;
     
          
                       // 循环所有DataTable
                       for( int i=0; i<ds.Tables.Count; i++ )
                       {
                           xlWorksheet = (Excel.Worksheet)xlWorkbook.Worksheets.Add(oMissing,oMissing,1,oMissing);
                           // 以TableName作为新加的Sheet页名。
                           xlWorksheet.Name = ds.Tables[i].TableName;
                           // 取出这个DataTable中的所有值,暂存于stringBuffer中。
                           string stringBuffer = "";
                           //向Excel中写入表格的表头
                           if(node != null)
                           {
                                XmlNode nodec=node.SelectSingleNode("./Method/ShowField");
                                int ii = 1;
                                foreach(XmlNode xnode in nodec.ChildNodes )
                                {
                                     xlApp.Cells[1,ii] =xnode.Attributes["displayname"].Value;                               
                                     ii++;
                                }
                          
                               
                                for( int j=0; j<ds.Tables[i].Rows.Count; j++ )
                                {
                                     for( int k=0; k<ds.Tables[i].Columns.Count; k++ )
                                     {
                 
                                         stringBuffer += ds.Tables[i].Rows[j][k].ToString();
                                         if( k < ds.Tables[i].Columns.Count - 1 )
                                              stringBuffer += "/t";
                                     }
                                     stringBuffer += "/n";
                                }
                               
                           }
                           else
                           {
                                int ii = 1;
                                for(int c = 0;c<ds.Tables[i].Columns.Count; c++)
                                {
                                     xlApp.Cells[1,ii] = ds.Tables[i].Columns[c].Caption;
                                     ii++;
                                }
                               
                                for( int j=0; j<ds.Tables[i].Rows.Count; j++ )
                                {
                                     for( int k=0; k<ds.Tables[i].Columns.Count; k++ )
                                     {
                 
                                         stringBuffer += ds.Tables[i].Rows[j][k].ToString();
                                         if( k < ds.Tables[i].Columns.Count - 1 )
                                              stringBuffer += "/t";
                                     }
                                     stringBuffer += "/n";
                                }
                           }
     
                           System.Windows.Forms.Clipboard.SetDataObject("");
                           // 将stringBuffer放入剪切板。
                           System.Windows.Forms.Clipboard.SetDataObject(stringBuffer);
                           // 选中这个sheet页中的第一个单元格
                           ((Excel.Range)xlWorksheet.Cells[2,1]).Select();
                           // 粘贴！
                           xlWorksheet.Paste(oMissing,oMissing);
                           // 清空系统剪切板。
                           System.Windows.Forms.Clipboard.SetDataObject("");
                      
     
     
                      
                       }
                       // 保存并关闭这个工作簿。
                      
                 
     
                 
                               
                       xlApp.ActiveWorkbook.Close( Excel.XlSaveAction.xlSaveChanges, oMissing, oMissing );
                       //                 xlWorkbook.Close( Excel.XlSaveAction.xlSaveChanges, oMissing, oMissing );
                       System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkbook);
                       xlWorkbook = null;
                       MessageBox.Show(@"Excel文件：C:/exportExcel.xls 导出成功！");
                  }
                  catch(Exception ex)
                  {
                       MessageBox.Show(ex.Message);
                  }
                  finally
                  {
                       // 释放...
                       xlApp.Quit();
                       System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
                       xlApp = null;
                       GC.Collect();
              }
     
           总结：这个方法比上面的方法性能好点，但还是很不好用，比原来的提高了2倍左右。
     
    3． 原理：利用OLEDB，以excel为数据库，把dataset中的数据导入到excel文件中
          
    [csharp] view plaincopy
    1.  public static void exportToExcelByDataset(string filePath, DataSet ds,XmlNode node)  
    2.   
    3.   {  
    4.   
    5.    string sqlstr;  
    6.   
    7.   
    8.   
    9.   
    10.   
    11.   
    12.   
    13.    if(fi.Exists)  
    14.   
    15.    {  
    16.   
    17.     fi.Delete();  
    18.   
    19.     //     throw new Exception("文件删除失败");  
    20.   
    21.    }  
    22.   
    23.    else  
    24.   
    25.    {  
    26.   
    27.     fi.Create();  
    28.   
    29.    }  
    30.   
    31.      
    32.   
    33.    string sqlcon=@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended ProPerties=Excel 8.0;";  
    34.   
    35.    OleDbConnection olecon = new OleDbConnection(sqlcon);  
    36.   
    37.    OleDbCommand olecmd = new OleDbCommand();  
    38.   
    39.    olecmd.Connection = olecon;  
    40.   
    41.    olecmd.CommandType = CommandType.Text;  
    42.   
    43.    
    44.   
    45.   
    46.   
    47.    try  
    48.   
    49.    {  
    50.   
    51.     olecon.Open();  
    52.   
    53.               
    54.   
    55.   
    56.   
    57.     XmlNode nodec=node.SelectSingleNode("./Method/ShowField");  
    58.   
    59.     int ii = 0;  
    60.   
    61.     sqlstr = "CREATE TABLE sheet1(";  
    62.   
    63.     foreach(XmlNode xnode in nodec.ChildNodes )  
    64.   
    65.     {  
    66.   
    67.      if(ii == nodec.ChildNodes.Count - 1)  
    68.   
    69.      {  
    70.   
    71.       if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")  
    72.   
    73.       {  
    74.   
    75.        sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number)";         
    76.   
    77.       }  
    78.   
    79.       else  
    80.   
    81.       {  
    82.   
    83.        sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";  
    84.   
    85.       }  
    86.   
    87.       //      sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";  
    88.   
    89.      }  
    90.   
    91.      else  
    92.   
    93.      {  
    94.   
    95.       if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")  
    96.   
    97.       {  
    98.   
    99.        sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number,";         
    100.   
    101.       }  
    102.   
    103.       else  
    104.   
    105.       {  
    106.   
    107.        sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text,";  
    108.   
    109.       }  
    110.   
    111.          
    112.   
    113.      }  
    114.   
    115.      //     sqlstr =sqlstr + xnode.Attributes["displayname"].Value + " text";         
    116.   
    117.      ii++;  
    118.   
    119.     }  
    120.   
    121.     olecmd.CommandText = sqlstr;  
    122.   
    123.     olecmd.ExecuteNonQuery();  
    124.   
    125.     for(int i=0;i<ds.Tables[0].Rows.Count;i++)  
    126.   
    127.     {  
    128.   
    129.      sqlstr = "INSERT INTO sheet1 VALUES(";  
    130.   
    131.      int jj=0;  
    132.   
    133.   
    134.   
    135.      foreach(XmlNode inode in nodec.ChildNodes )  
    136.   
    137.      {  
    138.   
    139.       if(jj == nodec.ChildNodes.Count-1)  
    140.   
    141.       {  
    142.   
    143.        if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")  
    144.   
    145.        {  
    146.   
    147.         sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + ")" ;  
    148.   
    149.           
    150.   
    151.        }  
    152.   
    153.        else  
    154.   
    155.        {  
    156.   
    157.         sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "')" ;  
    158.   
    159.        }  
    160.   
    161.       }  
    162.   
    163.       else  
    164.   
    165.       {  
    166.   
    167.        if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")  
    168.   
    169.        {  
    170.   
    171.         sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + "," ;  
    172.   
    173.           
    174.   
    175.        }  
    176.   
    177.        else  
    178.   
    179.        {  
    180.   
    181.         sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "'," ;  
    182.   
    183.        }  
    184.   
    185.       }  
    186.   
    187.       jj++;  
    188.   
    189.      }  
    190.   
    191.      olecmd.CommandText = sqlstr;  
    192.   
    193.      olecmd.ExecuteNonQuery();  
    194.   
    195.        
    196.   
    197.     }    
    198.   
    199.     MessageBox.Show(@"Excel文件：" + filePath + " 导出成功！");  
    200.   
    201.    }  
    202.   
    203.    catch(Exception ex)  
    204.   
    205.    {  
    206.   
    207.     MessageBox.Show(ex.Message);  
    208.   
    209.    }  
    210.   
    211.    finally  
    212.   
    213.    {  
    214.   
    215.     olecmd.Dispose();  
    216.   
    217.     olecon.Close();  
    218.   
    219.     olecon.Dispose();  
    220.   
    221.                      
    222.   
    223.    }  
    224.   
    225.   }  
    226.   
    227. /// <summary>  
    228.   
    229. /// change to string "null" if input is null  
    230.   
    231. /// </summary>  
    232.   
    233. /// <param name="obj"></param>  
    234.   
    235. /// <returns></returns>  
    236.   
    237.    
    238.   
    239.   private static string isnull(string obj)  
    240.   
    241.   {  
    242.   
    243.    if(obj.Length >0)  
    244.   
    245.    {  
    246.   
    247.     return obj;  
    248.   
    249.    }  
    250.   
    251.    else  
    252.   
    253.    {  
    254.   
    255.     return "null";  
    256.   
    257.    }  
    258.   
    259.   }  
           总结：这个方法是最好的，速度飞快，比上面两种提高不止10倍，而且关键是不需要用到office组 件，所以我正在用着这种方法，客户也满意。当然这个也有它不好的地方，有时候会受到导入的数据不符的异常困扰，而且为了赶时间，代码写的不好，一句话，能 用但要改进的地方很多：）
          

     ///2007-03-02

    最近发现几个导出到EXCEL的方法,这里先记录下来

    4.本示例是用于将ListView中的内容倒入到Excel 与常用的逐单元格写不同的是，本例子采用数据写入到range的方法。该方法效率明显较高

    [csharp] view plaincopy
    1. Excel.Application app = new Excel.ApplicationClass();      
    2.   
    3. if( app == null)      
    4.   
    5. {  
    6.   
    7.      MessageBox.Show("Excel无法启动");  
    8.   
    9.      return;      
    10.   
    11. }  
    12.   
    13.     app.Visible = true;  
    14.   
    15.     Excel.Workbooks wbs = app.Workbooks;  
    16.   
    17.     Excel.Workbook wb = wbs.Add(Missing.Value);  
    18.   
    19.     Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];  
    20.   
    21.     Excel.Range r = ws.get_Range("A1","H1");  
    22.   
    23.     object [] objHeader = {"标题1","标题2","标题3","标题4","标题5","标题6","标题7","标题8"};  
    24.   
    25.     r.Value = objHeader;  
    26.   
    27.     if (lv.Items.Count >0)  
    28.   
    29.     {  
    30.   
    31.      r = ws.get_Range("A2",Missing.Value);  
    32.   
    33.        object [,] objData = new Object[this.lv.Items.Count,8];  
    34.   
    35.      foreach(ListViewItem lvi in lv.Items)  
    36.   
    37.      {  
    38.   
    39.       objData[lvi.Index,0] = lvi.Text;  
    40.   
    41.       objData[lvi.Index,1] = lvi.SubItems[1].Text;  
    42.   
    43.       objData[lvi.Index,2] = lvi.SubItems[2].Text;  
    44.   
    45.       objData[lvi.Index,3] = lvi.SubItems[3].Text;  
    46.   
    47.       objData[lvi.Index,4] = lvi.SubItems[4].Text;  
    48.   
    49.       objData[lvi.Index,5] = lvi.SubItems[5].Text;  
    50.   
    51.       objData[lvi.Index,6] = lvi.SubItems[6].Text;  
    52.   
    53.       objData[lvi.Index,7] = lvi.SubItems[7].Text;  
    54.   
    55.      }  
    56.   
    57.      r = r.get_Resize(lv.Items.Count,8);  
    58.   
    59.      r.Value = objData;  
    60.   
    61.      r.EntireColumn.AutoFit();  
    62.   
    63.     }  
    64.   
    65.     app = null;  

    5.由XML文件导出为EXCEL文件

    目录下kfcccer.xml为原始数据XML文件，点击生成后会在同级目录下生成kfcccer.xls文件

    页面代码如下:

    [csharp] view plaincopy
    1. @ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>  
    2.   
    3.   
    4.   
    5. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
    6.   
    7.   
    8.   
    9. <html xmlns="http://www.w3.org/1999/xhtml" >  
    10.   
    11. <head runat="server">  
    12.   
    13.     <title>XML转换Excel演示</title>  
    14.   
    15. </head>  
    16.   
    17. <body>  
    18.   
    19.     <form id="form1" runat="server">  
    20.   
    21.     <div>  
    22.   
    23.         <div>  
    24.   
    25.             <asp:Button ID="btnChange" runat="server" Font-Bold="True" Font-Size="18pt" ForeColor="Black"  
    26.   
    27.                 Height="38px" OnClick="btnChange_Click" Text="开始转换" Width="203px" /></div>  
    28.   
    29.       
    30.   
    31.     </div>  
    32.   
    33.     </form>  
    34.   
    35. </body>  
    36.   
    37. </html>  

    后台代码:

    [csharp] view plaincopy
    1. using System;  
    2.   
    3. using System.Data;  
    4.   
    5. using System.Configuration;  
    6.   
    7. using System.Collections;  
    8.   
    9. using System.Web;  
    10.   
    11. using System.Web.Security;  
    12.   
    13. using System.Web.UI;  
    14.   
    15. using System.Web.UI.WebControls;  
    16.   
    17. using System.Web.UI.WebControls.WebParts;  
    18.   
    19. using System.Web.UI.HtmlControls;  
    20.   
    21. using System.IO;  
    22.   
    23.   
    24.   
    25. public partial class _Default : System.Web.UI.Page   
    26.   
    27. {  
    28.   
    29.     protected void Page_Load(object sender, EventArgs e)  
    30.   
    31.     {  
    32.   
    33.   
    34.   
    35.     }  
    36.   
    37.     protected void btnChange_Click(object sender, EventArgs e)  
    38.   
    39.     {  
    40.   
    41.         try  
    42.   
    43.         {  
    44.   
    45.             //要转换的XML文件  
    46.   
    47.             string XMLFileName = Path.Combine(Request.PhysicalApplicationPath, "kfcccer.xml");  
    48.   
    49.             DataSet dsBook = new DataSet();  
    50.   
    51.             dsBook.ReadXml(XMLFileName);  
    52.   
    53.             int rows = dsBook.Tables[0].Rows.Count + 1;  
    54.   
    55.             int cols = dsBook.Tables[0].Columns.Count;  
    56.   
    57.   
    58.   
    59.             //将要生成的Excel文件  
    60.   
    61.             string ExcelFileName = Path.Combine(Request.PhysicalApplicationPath, "kfcccer.xls");  
    62.   
    63.             if (File.Exists(ExcelFileName))  
    64.   
    65.             {  
    66.   
    67.                 File.Delete(ExcelFileName);  
    68.   
    69.             }  
    70.   
    71.             StreamWriter writer = new StreamWriter(ExcelFileName, false);  
    72.   
    73.             writer.WriteLine("<?xml version="1.0"?>");  
    74.   
    75.             writer.WriteLine("<?mso-application progid="Excel.Sheet"?>");  
    76.   
    77.             writer.WriteLine("<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"");  
    78.   
    79.             writer.WriteLine(" xmlns:o="urn:schemas-microsoft-com:office:office"");  
    80.   
    81.             writer.WriteLine(" xmlns:x="urn:schemas-microsoft-com:office:excel"");  
    82.   
    83.             writer.WriteLine(" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"");  
    84.   
    85.             writer.WriteLine(" xmlns:html="http://www.w3.org/TR/REC-html40/">");  
    86.   
    87.             writer.WriteLine(" <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">");  
    88.   
    89.             writer.WriteLine("  <Author>Automated Report Generator Example</Author>");  
    90.   
    91.             writer.WriteLine(string.Format("  <Created>{0}T{1}Z</Created>", DateTime.Now.ToString("yyyy-mm-dd"), DateTime.Now.ToString("HH:MM:SS")));  
    92.   
    93.             writer.WriteLine("  <Company>51aspx.com</Company>");  
    94.   
    95.             writer.WriteLine("  <Version>11.6408</Version>");  
    96.   
    97.             writer.WriteLine(" </DocumentProperties>");  
    98.   
    99.             writer.WriteLine(" <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">");  
    100.   
    101.             writer.WriteLine("  <WindowHeight>8955</WindowHeight>");  
    102.   
    103.             writer.WriteLine("  <WindowWidth>11355</WindowWidth>");  
    104.   
    105.             writer.WriteLine("  <WindowTopX>480</WindowTopX>");  
    106.   
    107.             writer.WriteLine("  <WindowTopY>15</WindowTopY>");  
    108.   
    109.             writer.WriteLine("  <ProtectStructure>False</ProtectStructure>");  
    110.   
    111.             writer.WriteLine("  <ProtectWindows>False</ProtectWindows>");  
    112.   
    113.             writer.WriteLine(" </ExcelWorkbook>");  
    114.   
    115.             writer.WriteLine(" <Styles>");  
    116.   
    117.             writer.WriteLine("  <Style ss:ID="Default" ss:Name="Normal">");  
    118.   
    119.             writer.WriteLine("   <Alignment ss:Vertical="Bottom"/>");  
    120.   
    121.             writer.WriteLine("   <Borders/>");  
    122.   
    123.             writer.WriteLine("   <Font/>");  
    124.   
    125.             writer.WriteLine("   <Interior/>");  
    126.   
    127.             writer.WriteLine("   <Protection/>");  
    128.   
    129.             writer.WriteLine("  </Style>");  
    130.   
    131.             writer.WriteLine("  <Style ss:ID="s21">");  
    132.   
    133.             writer.WriteLine("   <Alignment ss:Vertical="Bottom" ss:WrapText="1"/>");  
    134.   
    135.             writer.WriteLine("  </Style>");  
    136.   
    137.             writer.WriteLine(" </Styles>");  
    138.   
    139.             writer.WriteLine(" <Worksheet ss:Name="MyReport">");  
    140.   
    141.             writer.WriteLine(string.Format("  <Table ss:ExpandedColumnCount="{0}" ss:ExpandedRowCount="{1}" x:FullColumns="1"", cols.ToString(), rows.ToString()));  
    142.   
    143.             writer.WriteLine("   x:FullRows="1">");  
    144.   
    145.   
    146.   
    147.             //生成标题  
    148.   
    149.             writer.WriteLine("<Row>");  
    150.   
    151.             foreach (DataColumn eachCloumn in dsBook.Tables[0].Columns)  
    152.   
    153.             {  
    154.   
    155.                 writer.Write("<Cell ss:StyleID="s21"><Data ss:Type="String">");  
    156.   
    157.                 writer.Write(eachCloumn.ColumnName.ToString());  
    158.   
    159.                 writer.WriteLine("</Data></Cell>");  
    160.   
    161.             }  
    162.   
    163.             writer.WriteLine("</Row>");  
    164.   
    165.   
    166.   
    167.             //生成数据记录  
    168.   
    169.             foreach (DataRow eachRow in dsBook.Tables[0].Rows)  
    170.   
    171.             {  
    172.   
    173.                 writer.WriteLine("<Row>");  
    174.   
    175.                 for (int currentRow = 0; currentRow != cols; currentRow++)  
    176.   
    177.                 {  
    178.   
    179.                     writer.Write("<Cell ss:StyleID="s21"><Data ss:Type="String">");  
    180.   
    181.                     writer.Write(eachRow[currentRow].ToString());  
    182.   
    183.                     writer.WriteLine("</Data></Cell>");  
    184.   
    185.                 }  
    186.   
    187.                 writer.WriteLine("</Row>");  
    188.   
    189.             }  
    190.   
    191.             writer.WriteLine("  </Table>");  
    192.   
    193.             writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");  
    194.   
    195.             writer.WriteLine("   <Selected/>");  
    196.   
    197.             writer.WriteLine("   <Panes>");  
    198.   
    199.             writer.WriteLine("    <Pane>");  
    200.   
    201.             writer.WriteLine("     <Number>3</Number>");  
    202.   
    203.             writer.WriteLine("     <ActiveRow>1</ActiveRow>");  
    204.   
    205.             writer.WriteLine("    </Pane>");  
    206.   
    207.             writer.WriteLine("   </Panes>");  
    208.   
    209.             writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");  
    210.   
    211.             writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");  
    212.   
    213.             writer.WriteLine("  </WorksheetOptions>");  
    214.   
    215.             writer.WriteLine(" </Worksheet>");  
    216.   
    217.             writer.WriteLine(" <Worksheet ss:Name="Sheet2">");  
    218.   
    219.             writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");  
    220.   
    221.             writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");  
    222.   
    223.             writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");  
    224.   
    225.             writer.WriteLine("  </WorksheetOptions>");  
    226.   
    227.             writer.WriteLine(" </Worksheet>");  
    228.   
    229.             writer.WriteLine(" <Worksheet ss:Name="Sheet3">");  
    230.   
    231.             writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");  
    232.   
    233.             writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");  
    234.   
    235.             writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");  
    236.   
    237.             writer.WriteLine("  </WorksheetOptions>");  
    238.   
    239.             writer.WriteLine(" </Worksheet>");  
    240.   
    241.             writer.WriteLine("</Workbook>");  
    242.   
    243.             writer.Close();  
    244.   
    245.             Response.Write("<script language="javascript">" + "alert('" + "转换成功! 转换后的Excel文件名为: kfcccer.xls')" + "</script>");  
    246.   
    247.         }  
    248.   
    249.         catch (Exception ex)  
    250.   
    251.         {  
    252.   
    253.             Response.Write("<script language="javascript">" + "alert('" + "操作失败! 出错信息: " + ex.Message + "')" + "</script>");  
    254.   
    255.         }  
    256.   
    257.     }  
    258.   
    259. }  

    6.以模版形式导出为EXCEL文件 最近在项目中看到同事的一个导出的解决方案，感觉很不错，以前我如果碰到有些客户要按某些格式把数据导出为EXCEL时，就会感觉很麻烦，有段时间会用水 晶报表导出EXCEL的形式来做，但效果很不好，有些控件会提供对应的方法，但这不是我们这些人所喜欢的，我喜欢能自己编，而不喜欢给人已经封装好的东 西，除非他提供原代码也可以，呵呵。其实这个方案说起来很简单，就是先做好一个EXCEL模版，然后用代码把对应的数据填进去，这样就可以很好的满足客户 的按格式导出的需求，而且还可以让客户来提供模版，这样效果更佳，下面就贴些关键代码：

      

    [csharp] view plaincopy
    1.     ApplicationClass oExcel = null;  
    2.   
    3.       Workbook wb = null;  
    4.   
    5.       Sheets sheets = null;  
    6.   
    7.       _Worksheet worksheet = null;  
    8.   
    9.       Range range = null;  
    10.   
    11.   
    12.   
    13. 。。。  
    14.   
    15. public void showBookingData(DataSet ds)  
    16.   
    17.       {  
    18.   
    19.           showBrHeard(ds.Tables["BR_HEAD"]);  
    20.   
    21.           showReference(ds.Tables["BR_REFERENCE"]);  
    22.   
    23.           showBrConta(ds.Tables["BR_CONTAINER"]);  
    24.   
    25.           showBrCargo(ds.Tables["BR_CARGO"]);  
    26.   
    27.           showBrParties(ds.Tables["BR_PARTIES"]);  
    28.   
    29.           showBrLocation(ds.Tables["BR_LOCATION"]);  
    30.   
    31.           showBrDoor(ds.Tables["BR_DOOR"]);  
    32.   
    33.       }  
    34.  
    35.  
    36.  
    37.       #region 显示Booking数据  
    38.   
    39.       private void showBrHeard(System.Data.DataTable dt)  
    40.   
    41.       {  
    42.   
    43.           if (dt.Rows.Count > 0)  
    44.   
    45.           {  
    46.   
    47.               DataRow dRow = dt.Rows[0];  
    48.   
    49.               if (bkType != "temp")  
    50.   
    51.               {  
    52.   
    53.                   this.range = this.worksheet.get_Range("A2", Type.Missing);  
    54.   
    55.                   this.range.Value2 = "'"+dRow["CMC_BR_NUMBER"].ToString();  
    56.   
    57.               }  
    58.   
    59.               this.range = this.worksheet.get_Range("G2", Type.Missing);  
    60.   
    61.               this.range.Value2 = Utility.GetCarrier(dRow["SCAC_CODE"].ToString());  
    62.   
    63.               this.range = this.worksheet.get_Range("F11", Type.Missing);  
    64.   
    65.               String tfc = dRow["TRAFFIC_MODE"].ToString();  
    66.   
    67.               this.range.Value2 = Utility.GetTrafficById(Convert.ToDecimal(tfc));  
    68.   
    69.               String drm = dRow["PICKUP_DELIVERY"].ToString();  
    70.   
    71.               this.range = this.worksheet.get_Range("H11", Type.Missing);  
    72.   
    73.               this.range.Value2 = Utility.GetDragModeById(Convert.ToDecimal(drm)).ToUpper();  
    74.   
    75.   
    76.   
    77.               if (dRow["VESSEL_NAME"].ToString().Trim().Length != 0)  
    78.   
    79.               {  
    80.   
    81.                   this.range = this.worksheet.get_Range("A23", Type.Missing);  
    82.   
    83.                   this.range.Value2 = dRow["VESSEL_NAME"].ToString() + "/" + dRow["VESSEL_VOYAGE"].ToString();  
    84.   
    85.               }  
    86.   
    87.               else  
    88.   
    89.               {  
    90.   
    91.                   if (dRow["EST_DEPARTDATE"].ToString().Trim().Length != 0)  
    92.   
    93.                   {  
    94.   
    95.                       this.range = this.worksheet.get_Range("D23", Type.Missing);  
    96.   
    97.                       this.range.Value2 = Convert.ToDateTime(dRow["EST_DEPARTDATE"]).ToString("yyyy-MM-dd");  
    98.   
    99.                   }  
    100.   
    101.                   else if (dRow["EST_ARRIVDATE"].ToString().Trim().Length != 0)  
    102.   
    103.                   {  
    104.   
    105.                       this.range = this.worksheet.get_Range("C23", Type.Missing);  
    106.   
    107.                       this.range.Value2 = Convert.ToDateTime(dRow["EST_ARRIVDATE"]).ToString("yyyy-MM-dd");  
    108.   
    109.                   }  
    110.   
    111.               }  
    112.   
    113.               writeStrDate("A", 41, dRow["REMARK"].ToString() + "/n");  
    114.   
    115.               if (bkType != "temp")  
    116.   
    117.               {  
    118.   
    119.                   if (dRow["BR_NUMBER"] != null && dRow["BR_NUMBER"].ToString() != "")  
    120.   
    121.                   {  
    122.   
    123.                       strRN += "Booking No." + dRow["BR_NUMBER"].ToString() + "/n";  
    124.   
    125.                   }  
    126.   
    127.               }  
    128.   
    129.               if (dRow["RATE_REFNO"] != null && dRow["RATE_REFNO"].ToString() != "")  
    130.   
    131.               {  
    132.   
    133.                   strRN += "Contact No." + dRow["RATE_REFNO"].ToString() + "/n";  
    134.   
    135.               }  
    136.   
    137.           }  
    138.   
    139.       }  
    140.   
    141.   
    142.   
    143. 。。。。。。  

    做法简单，但效果很好。唯一缺点就是速度比较慢，而且受限制比较多。

    参考地址:http://www.cnblogs.com/kfcccer/archive/2007/05/20/753441.html

    7.按XML定义格式把DATASET导出EXCEL    这个方法我没用过,是在CSDN上看到的,主要需求是说在DATESET导出为EXCEL时,需要对其中的数据进行定义,不然导出后与现有格式对不上,比 如时间的,导出后会和原来的数据有出入等等一类的问题.   我感觉其实和第五个比较相近,但因为最近比较忙.我也没时间要验证,如果谁用了希望可以反馈给我,谢谢了.下面是代码:

     private static void DataSetExportToExcel(DataSet source, string fileName)

        {

            System.IO.StreamWriter excelDoc;

            excelDoc = new System.IO.StreamWriter(fileName);

            const string startExcelXML = @"<xml version> <Workbook " +

                  "xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/" " +

                  " xmlns:o=/"urn:schemas-microsoft-com:office:office/"  " +

                  "xmlns:x=/"urn:schemas-    microsoft-com:office:" +

                  "excel/"  xmlns:ss=/"urn:schemas-microsoft-com:" +

                  "office:spreadsheet/">  <Styles>  " +

                  "<Style ss:ID=/"Default/" ss:Name=/"Normal/">  " +

                  "<Alignment ss:Vertical=/"Bottom/"/>  <Borders/>" +

                  "  <Font/>  <Interior/>  <NumberFormat/>" +

                  "  <Protection/>  </Style>  " +

                  "<Style ss:ID=/"BoldColumn/">  <Font " +

                  "x:Family=/"Swiss/" ss:Bold=/"1/"/>  </Style>  " +

                  "<Style     ss:ID=/"StringLiteral/">  <NumberFormat" +

                  " ss:Format=/"@/"/>  </Style>  <Style " +

                  "ss:ID=/"Decimal/">  <NumberFormat " +

                  "ss:Format=/"0.0000/"/>  </Style>  " +

                  "<Style ss:ID=/"Integer/">  <NumberFormat " +

                  "ss:Format=/"0/"/>  </Style>  <Style " +

                  "ss:ID=/"DateLiteral/">  <NumberFormat " +

                  "ss:Format=/"mm/dd/yyyy;@/"/>  </Style>  " +

                  "</Styles>  ";

            const string endExcelXML = "</Workbook>";

            int rowCount = 0;

            int sheetCount = 1;

          

            excelDoc.Write(startExcelXML);

            excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");

            excelDoc.Write("<Table>");

            excelDoc.Write("<Row>");

            for (int x = 0; x < source.Tables[0].Columns.Count; x++)

            {

                excelDoc.Write("<Cell ss:StyleID=/"BoldColumn/"><Data ss:Type=/"String/">");

                excelDoc.Write(source.Tables[0].Columns[x].ColumnName);

                excelDoc.Write("</Data></Cell>");

            }

            excelDoc.Write("</Row>");

            foreach (DataRow x in source.Tables[0].Rows)

            {

                rowCount++;

                //if the number of rows is > 64000 create a new page to continue output

                if (rowCount == 64000)

                {

                    rowCount = 0;

                    sheetCount++;

                    excelDoc.Write("</Table>");

                    excelDoc.Write(" </Worksheet>");

                    excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");

                    excelDoc.Write("<Table>");

                }

                excelDoc.Write("<Row>"); //ID=" + rowCount + "

                for (int y = 0; y < source.Tables[0].Columns.Count; y++)

                {

                    System.Type rowType;

                    rowType = x[y].GetType();

                    switch (rowType.ToString())

                   {

                        case "System.String":

                            string XMLstring = x[y].ToString();

                            XMLstring = XMLstring.Trim();

                            XMLstring = XMLstring.Replace("&", "&");

                            XMLstring = XMLstring.Replace(">", ">");

                            XMLstring = XMLstring.Replace("<", "<");

                            excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

                                           "<Data ss:Type=/"String/">");

                            excelDoc.Write(XMLstring);

                            excelDoc.Write("</Data></Cell>");

                            break;

                        case "System.DateTime":

                            //Excel has a specific Date Format of YYYY-MM-DD followed by 

                            //the letter 'T' then hh:mm:sss.lll Example 2005-01-31T24:01:21.000

                            //The Following Code puts the date stored in XMLDate

                            //to the format above

                            DateTime XMLDate = (DateTime)x[y];

                            string XMLDatetoString = ""; //Excel Converted Date

                            XMLDatetoString = XMLDate.Year.ToString() +

                                 "-" +

                                 (XMLDate.Month < 10 ? "0" +

                                 XMLDate.Month.ToString() : XMLDate.Month.ToString()) +

                                 "-" +

                                 (XMLDate.Day < 10 ? "0" +

                                 XMLDate.Day.ToString() : XMLDate.Day.ToString()) +

                                 "T" +

                                 (XMLDate.Hour < 10 ? "0" +

                                 XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) +

                                 ":" +

                                 (XMLDate.Minute < 10 ? "0" +

                                 XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) +

                                 ":" +

                                 (XMLDate.Second < 10 ? "0" +

                                 XMLDate.Second.ToString() : XMLDate.Second.ToString()) +

                                 ".000";

                            excelDoc.Write("<Cell ss:StyleID=/"DateLiteral/">" +

                                         "<Data ss:Type=/"DateTime/">");

                            excelDoc.Write(XMLDatetoString);

                            excelDoc.Write("</Data></Cell>");

                            break;

                        case "System.Boolean":

                            excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

                                        "<Data ss:Type=/"String/">");

                            excelDoc.Write(x[y].ToString());

                            excelDoc.Write("</Data></Cell>");

                            break;

                        case "System.Int16":

                        case "System.Int32":

                        case "System.Int64":

                        case "System.Byte":

                            excelDoc.Write("<Cell ss:StyleID=/"Integer/">" +

                                    "<Data ss:Type=/"Number/">");

                            excelDoc.Write(x[y].ToString());

                            excelDoc.Write("</Data></Cell>");

                            break;

                        case "System.Decimal":

                        case "System.Double":

                            excelDoc.Write("<Cell ss:StyleID=/"Decimal/">" +

                                  "<Data ss:Type=/"Number/">");

                            excelDoc.Write(x[y].ToString());

                            excelDoc.Write("</Data></Cell>");

                            break;

                        case "System.DBNull":

                            excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

                                  "<Data ss:Type=/"String/">");

                            excelDoc.Write("");

                            excelDoc.Write("</Data></Cell>");

                            break;

                        default:

                            throw (new Exception(rowType.ToString() + " not handled."));

                    }

                }

                excelDoc.Write("</Row>");

            }

            excelDoc.Write("</Table>");

            excelDoc.Write(" </Worksheet>");

            excelDoc.Write(endExcelXML);

            excelDoc.Close();

        }

    原文转自：http://blog.csdn.net/simonllf/article/details/1441672
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  • 原文地址：https://www.cnblogs.com/yubufan/p/3552184.html
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