Ｃ# SQL与EXCLE数据互导

EXCEL表里的数据导入SQL中，简化代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Collections;
using System.IO;

namespace SqlExcel
{
    publicpartialclass Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        SqlHelper sqlhelper =new SqlHelper();

        ///<summary>
        /// 选择excle路径
        ///</summary>
        ///<param name="sender"></param>
        ///<param name="e"></param>
privatevoid button1_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog =new OpenFileDialog())
            {
                dialog.Multiselect =true;
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    try
                    {
                        textBox1.Text = dialog.FileName;
                    }
                    catch { }
                }
            }

        }
        ///<summary>
        /// 先把excle读到Dataset里
        ///</summary>
        ///<param name="filenameurl">文件路径名</param>
        ///<returns></returns>
public DataSet ExecleDs(string filenameurl)
        {

            string strConn ="Provider=Microsoft.Jet.OleDb.4.0;"+"data source="+ filenameurl +";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";
            OleDbConnection conn =new OleDbConnection(strConn);
            OleDbCommand cmd =new OleDbCommand("select * from [Sheet1$]",conn);
            OleDbDataAdapter odda =new OleDbDataAdapter(cmd);
            DataSet ds =new DataSet();
            odda.Fill(ds);
            return ds;
        }

        ///<summary>
        /// 把Dataset里的数据一行一行的插入到数据表里
        ///</summary>
        ///<param name="sender"></param>
        ///<param name="e"></param>
privatevoid button2_Click(object sender, EventArgs e)
        {
            int ii =0;
            DataSet ds = ExecleDs(textBox1.Text);
            System.Data.DataTable dt = ds.Tables[0];

            try
            {
                string strInsertComm;
                for (int i =0; i < dt.Rows.Count; i++)
                {
                    strInsertComm ="";
                    strInsertComm ="Insert INTO T_Student(F_Num,F_Name,F_Sex,F_Dept)";
                    strInsertComm +=" values(";
                    for (int j =0; j < dt.Columns.Count; j++)
                    {
                        if (j >0)
                        {
                            strInsertComm +=",'"+ dt.Rows[i][j].ToString().Trim() +"'";
                        }
                        else
                        {
                            strInsertComm +="'"+ dt.Rows[i][j].ToString().Trim() +"'";
                        }
                    }
                    strInsertComm +=")";
                    ii = sqlhelper.getcomnum(strInsertComm);//执行SQL语句
                }
                if (ii >0)
                {
                    MessageBox.Show("导入成功！");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

EXCEL表里的数据导入SQL中，完整代码（代码是从EXCEL2007导入到数据库的，如果想从2003中导入，则将Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FilePath + ";Extended Properties='Excel 12.0; HDR=YES; IMEX=1'　改为Provider=Microsoft.ACE.OLEDB.4.0;Data Source=" + FilePath + ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Collections;
using System.IO;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Interop.Excel;




namespace SqlExcel
{
    publicpartialclass Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        SqlHelper sqlhelper =new SqlHelper();
        privatevoid Form1_Load(object sender, EventArgs e)
        {

        }

        #region Excel导入SQL数据库
        ///<summary>
        /// 选择要向SQL数据库中导入数据的Excel文件
        ///</summary>
privatevoid btnChoose_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog =new OpenFileDialog())
            {
                dialog.Multiselect =true;
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    try
                    {
                        txtPath.Text = dialog.FileName;
                    }
                    catch { }
                }
            }
        }

        ///<summary>
        /// 获取Excel数据表列表
        ///</summary>
        ///<returns></returns>
publicstatic ArrayList GetExcelTables(string FilePath)
        {
            //将Excel架构存入数据里
            System.Data.DataTable dt =new System.Data.DataTable();
            ArrayList TablesList =new ArrayList();

            if (File.Exists(FilePath))
            {
                using (OleDbConnection conn =new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties=\"Excel 8.0; HDR=YES; IMEX=1\";Data Source="+ FilePath))
                {
                    try
                    {
                        conn.Open();
                        dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, newobject[] { null, null, null, "TABLE" });
                    }
                    catch (Exception exp)
                    {
                        MessageBox.Show(exp.Message);
                    }

                    //获取数据表个数
int tablecount = dt.Rows.Count;
                    for (int i =0; i < tablecount; i = i +2)
                    {
                        string tablename = dt.Rows[i][2].ToString().Trim().TrimEnd('$');
                        if (TablesList.IndexOf(tablename) <0)
                        {
                            TablesList.Add(tablename);
                        }

                    }
                }
            }
            return TablesList;
        }

        ///<summary>
        /// 导入Excel数据表至DataTable（第一行作为表头）
        ///</summary>
        ///<returns></returns>
publicstatic System.Data.DataSet FillDataSet(string FilePath)
        {
            if (!File.Exists(FilePath))
            {
                thrownew Exception("Excel文件不存在！");
            }

            ArrayList TableList =new ArrayList();
            TableList = GetExcelTables(FilePath);
            if (TableList.Count <=0)
            {
                returnnull;
            }

            System.Data.DataTable table;
            System.Data.DataSet ds =new DataSet();
            OleDbConnection dbcon =new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+ FilePath +";Extended Properties='Excel 12.0; HDR=YES; IMEX=1'");
            try
            {
                if (dbcon.State == ConnectionState.Closed)
                {
                    dbcon.Open();
                }
                for (int i =0; i < TableList.Count; i++)
                {
                    string dtname = TableList[i].ToString();
                    try
                    {
                        OleDbCommand cmd =new OleDbCommand("select * from [Sheet1$]", dbcon);
                        OleDbDataAdapter adapter =new OleDbDataAdapter(cmd);
                        table =new System.Data.DataTable();
                        adapter.Fill(table);
                        ds.Tables.Add(table);
                    }
                    catch (Exception exp)
                    {
                        MessageBox.Show(exp.Message);
                    }
                }
            }
            finally
            {
                if (dbcon.State == ConnectionState.Open)
                {
                    dbcon.Close();
                }
            }
            return ds;
        }

        ///<summary>
        /// Excel导入数据库
        ///</summary>
        ///<returns></returns>
publicstatic DataSet ImportFromExcel(string FilePath)
        {
            return FillDataSet(FilePath);
        }

        ///<summary>
        /// 将Excel中的数据导入到SQL数据库中
        ///</summary>
privatevoid btnExcelToSql_Click(object sender, EventArgs e)
        {
            int ii =0;
            DataSet ds = ImportFromExcel(txtPath.Text);
           System.Data.DataTable dt = ds.Tables[0];

            try
            {
                string strInsertComm;
                for (int i =0; i < dt.Rows.Count; i++)
                {
                    strInsertComm ="";
                    strInsertComm ="Insert INTO T_Student(F_Num,F_Name,F_Sex,F_Dept)";
                    strInsertComm +=" values(";
                    for (int j =0; j < dt.Columns.Count; j++)
                    {
                        if (j >0)
                        {
                            strInsertComm +=",'"+ dt.Rows[i][j].ToString().Trim() +"'";
                        }
                        else
                        {
                            strInsertComm +="'"+ dt.Rows[i][j].ToString().Trim() +"'";
                        }
                    }
                    strInsertComm +=")";
                    ii = sqlhelper.getcomnum(strInsertComm);
                }
                if (ii >0)
                {
                    MessageBox.Show("导入成功！");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        #endregion

下面为SQL2005里的数据导出到EXCEL中，先添加excel引用，再加上using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Interop.Excel;这两个命名空间，代码如下：

#region sql数据库导出Excel
        publicvoid Export(string tableName)
        {

            DataSet ds1 = sqlhelper.getds("select F_Num as '学 号',F_Name as '姓 名',F_Sex as '性 别',F_Dept as '所有系院' from "+ tableName, tableName);
            if (ds1 ==null)
            {
                MessageBox.Show("系统内部错误！请联系系统开发者！", "出错了：", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            string saveFileName ="";
            SaveFileDialog saveDialog =new SaveFileDialog();
            saveDialog.DefaultExt ="xls";
            saveDialog.Filter ="Excel文件|*.xls";
            saveDialog.FileName ="";
            saveDialog.ShowDialog();
            saveFileName = saveDialog.FileName;
            if (saveFileName.IndexOf(":") <0)
            {
                MessageBox.Show("您取消了导出操作！", "提示信息：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                return;
            }

            Microsoft.Office.Interop.Excel.Application xlApp =new Microsoft.Office.Interop.Excel.Application();
            object miss = System.Reflection.Missing.Value;

            if (xlApp ==null)
            {
                MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel！", "出错了：", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }


            Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
            Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
            Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
            Microsoft.Office.Interop.Excel.Range range;


            //总行数和总列数
long totalRowCount = ds1.Tables[0].Rows.Count;
            long totalColCount = ds1.Tables[0].Columns.Count;

            //写入第一行表头    
for (int i =0; i < totalColCount; i++)
            {
                worksheet.Cells[1, i +1] = ds1.Tables[0].Columns[i].ColumnName;
                range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i +1];
                range.Interior.ColorIndex =15;
                range.Font.Size =15;//设定标题的大小
                range.Columns.AutoFit();//自动调整报表表格宽度为最适合宽度
                range.Font.Bold =true;
            }


            //写入数值          
for (int r =0; r < totalRowCount; r++)
            {
                for (int i =0; i < totalColCount; i++)
                {
                    worksheet.Cells[r +2, i +1] = ds1.Tables[0].Rows[r][i].ToString();
                    range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r +2, 1];//设置第一列为自动调整宽度
                    range.Columns.AutoFit();
                }

            }

            range = worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[ds1.Tables[0].Rows.Count +1, ds1.Tables[0].Columns.Count]);

            if (totalRowCount >0)
            {
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic;
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous;
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;

            }

            if (totalColCount >1)
            {
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].ColorIndex = Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic;
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous;
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;

            }

            if (range !=null)
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(range);
                range =null;
            }

            if (worksheet !=null)
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
                worksheet =null;
            }
            if (saveFileName !="")
            {
                try
                {
                    workbook.Saved =true;
                    System.Reflection.Missing missing = System.Reflection.Missing.Value;
                    workbook.SaveAs(saveFileName, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, miss, miss, miss, miss,
                    Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss, miss, miss);
                    MessageBox.Show("导出成功！", "提示信息：", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("导出文件错误！请重试！", "出错了：", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }

            }

            if (workbook !=null)
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
                workbook =null;

            }

            if (workbooks !=null)
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);
                workbooks =null;

            }

            xlApp.Application.Workbooks.Close();

            xlApp.Quit();
            GC.Collect();
        }
        
        privatevoid button1_Click(object sender, EventArgs e)
        {
            Export("T_Student");
        }
        #endregion