导入Excel数据

using System;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Reflection;
using System.Web;
using System.Collections;
using System.Web.UI.WebControls;
using System.Collections.Generic;
using Microsoft.SharePoint.Administration;
using System.Data.OleDb;
using System.Data;
using System.Linq;
using System.Drawing;
using System.Data.SqlClient;

namespace MyDemo.Layouts.MyDemo
{
    public partial class Excel : LayoutsPageBase
    {
        string rootUrl = Common.rootUrl;//连接地址
        string strExcelConn;//Excel使用的Connction
            
        protected void Page_Load(object sender, EventArgs e)
        {
        }
        protected void ButImport_Click(object sender, EventArgs e)
        {
            if (FileUploadImport.HasFile)
            {
                string strLoginName = HttpContext.Current.User.Identity.Name.ToString();    //获取用户名
                string folderTemp = strLoginName.Substring(strLoginName.LastIndexOf('\') + 1);
                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    try
                    {
                        string FileException = System.IO.Path.GetExtension(FileUploadImport.FileName).ToLower();//选中文件的类型
                        //通过判断类型是否为xlsx和xls来判断是否为Excel文件
                        if (FileException == ".xlsx" || FileException == ".xls")
                        {
                            string FileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");//获取文件地址
                            if (!Directory.Exists(FileFolder))     //根目录 
                            {
                                Directory.CreateDirectory(FileFolder);//判断上传目录是否存在     自动创建 
                            }
                            string StrFilepath = FileFolder + FileUploadImport.FileName;//FileUpload文件路径
                            FileUploadImport.SaveAs(StrFilepath);//将导入文件保存在Web服务器上此路径
                            using (SPSite site = new SPSite(rootUrl))
                            {
                                //获取站点
                                SPWeb web = site.RootWeb;
                                SPList list = web.GetList(rootUrl + "/Lists/HomePage/AllItems.aspx");
                                //允许站点在GET请求上进行更新
                                web.AllowUnsafeUpdates = true;
                                //添加列表项                     
                                string strExcel = ExcelSheetName(StrFilepath)[0].ToString();//获取Excel表文件名
                                int ExcelRow = ExcelDataSource(StrFilepath, strExcel).Tables[0].Rows.Count;//获取Excel表中的行数
                                int ExcelColumn = ExcelDataSource(StrFilepath, strExcel).Tables[0].Columns.Count;//获取Excel表中的列数
                                try
                                {
                                    for (int i = 0; i < ExcelRow; i++)
                                    {
                                        SPListItem newItem = list.AddItem();
                                        for (int j = 0; j < ExcelColumn; j++)
                                        {
                                            newItem[ChangeRowName(list, ExcelDataSource(StrFilepath, strExcel).Tables[0].Columns[j].ColumnName)] = ExcelDataSource(StrFilepath, strExcel).Tables[0].Rows[i][j].ToString();
                                        }
                                        newItem.Update();
                                    }
                                }
                                catch (Exception ex)
                                {
                                    Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('Excel表列名与系统不符合，请检查Excel表列名！');</script>");
                                }                           
                            }
                        }
                        else
                        {
                            Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('您选择的文件不是Excel格式！');</script>");
                        }
                    }
                    catch (Exception ex)
                    {
                        throw ex;
                    }
                    finally
                    {
                        string strFileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");
                        if (Directory.Exists(strFileFolder))     //根目录 
                        {
                            //Directory.CreateDirectory(strFileFolder);//判断上传目录是否存在     自动创建 
                            Directory.Delete(strFileFolder, true);//删除临时文件
                        }
                    }
                });
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('上传失败！');</script>");
            }
            
        }

        protected void ButExport_Click(object sender, EventArgs e)
        {
            string strLoginName = HttpContext.Current.User.Identity.Name.ToString();    //获取用户名
            string folderTemp = strLoginName.Substring(strLoginName.LastIndexOf('\') + 1);
            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                try
                {
                    string FileName = DateTime.Now.ToString("yyyy.MM.dd HH.mm.ss") + ".xlsx";//以日期定义要导出的文件名
                    string FileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");
                    if (!Directory.Exists(FileFolder))     //根目录 
                    {
                        Directory.CreateDirectory(FileFolder);//判断上传目录是否存在     自动创建 
                    }
                    string strFilePath = FileFolder + FileName;
                    System.Data.DataTable dt = new System.Data.DataTable();

                    using (SPWeb spweb = new SPSite(rootUrl).OpenWeb())
                    {
                        SPList spList = spweb.GetList(rootUrl + "/Lists/ProjectList/AllItems.aspx");
                        dt.Columns.Add("", typeof(string));
                        dt.Columns.Add("标题", typeof(string));
                        dt.Columns.Add("项目标题", typeof(string));
                        dt.Columns.Add("用户名", typeof(string));
                        SPListItemCollection itemColl = spList.Items;
                        foreach (SPListItem item in itemColl)
                        {
                            string strTitle = item["标题"].ToString();
                            string strManager = item["项目标题"].ToString();
                            string strSchedule = item["用户名"].ToString();
                            dt.Rows.Add("", strTitle, strManager, strSchedule);
                        }
                    }
                    //创建一个Excel应用程序对象，如果未创建成功则推出。
                    Application excel1 = new Application();
                    if (excel1 == null)
                    {
                        System.Web.HttpContext.Current.Response.Write("无法创建Excel对象，可能你的电脑未装Excel");
                    }
                    Workbooks workBooks1 = excel1.Workbooks;
                    Workbook workBook1 = workBooks1.Add(XlWBATemplate.xlWBATWorksheet);
                    Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)excel1.Worksheets[1];   //取得sheet1          

                    for (int i = 0; i < dt.Columns.Count; i++)
                    {

                        worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName.ToString();
                    }
                    //把DataTable的数据导入到Excel中（这里用的是两个for循环，当表中行，列比较少时       还 可以，但是比较多时，速度就会很慢，我电脑两万五千条用了尽量分钟）
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        for (int j = 0; j < dt.Columns.Count; j++)
                        {
                            worksheet.Cells[i + 2, j + 1] = dt.Rows[i][j].ToString();
                        }
                    }
                    try
                    {
                        //保存Excel
                        workBook1.Saved = true;
                        workBook1.SaveCopyAs(FileFolder+FileName);
                    }
                    catch (Exception ex)
                    {
                        System.Web.HttpContext.Current.Response.Write("导出文件时出错，文件可能正被打开!
" + ex.ToString());
                    }
                    workBook1.Close();
                    excel1.Visible = true;
                    if (excel1 != null)
                    {
                        excel1.Workbooks.Close();
                        excel1.Quit();

                        int generation = System.GC.GetGeneration(excel1);
                        System.Runtime.InteropServices.Marshal.ReleaseComObject(excel1);

                        excel1 = null;
                        System.GC.Collect(generation);
                    }

                }
                catch (Exception ex)
                {
                    throw ex;
                } 
            });
        }
        //连接到Excel
         public DataSet ExcelDataSource( string filepath , string sheetname )
        {
            strExcelConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;HDR=YES'";
            OleDbConnection conn = new OleDbConnection(strExcelConn);
            OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + sheetname + "]", strExcelConn);
            DataSet ds = new DataSet();
            oada.Fill(ds);
            return ds;
        }

        //获得Excel中的所有sheetname。
        public ArrayList ExcelSheetName( string filepath )
        {
            strExcelConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;HDR=YES'";
            ArrayList al = new ArrayList();
            OleDbConnection conn = new OleDbConnection(strExcelConn);
            conn.Open();
            System.Data.DataTable sheetNames = conn.GetOleDbSchemaTable( System.Data.OleDb.OleDbSchemaGuid.Tables,new object[]{null,null,null,"TABLE"} );
            conn.Close();
            foreach ( DataRow dr in sheetNames.Rows )
            {
                al.Add(dr[2]);
            }
            return al;
        }
        public string ChangeRowName(SPList splist, string rowName)
        {
            try
            {
                return splist.Fields[rowName].InternalName;
            }
            catch (Exception)
            {
                return "";
            }
        }
    }
}