C#将Excel数据表导入SQL数据库

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.OleDb;

namespace ExcelToSQL
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //测试，将excel中的student导入到sqlserver的db_test中，如果sql中的数据表不存在则创建   
            string connString = "server = (local); uid = sa; pwd = sa; database = db_test";
            System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();   
            if (fd.ShowDialog() == DialogResult.OK)   
            {
                TransferData(fd.FileName, "student", connString);
            }   
        }   

        public void TransferData(string excelFile, string sheetName, string connectionString)   
        {   
            DataSet ds = new DataSet();
            try  
            {
                //获取全部数据
                string strConn = "Provider = Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelFile + ";" + "Extended Properties = Excel 8.0;";   
                OleDbConnection conn = new OleDbConnection(strConn);
                conn.Open();
                string strExcel = "";
                OleDbDataAdapter myCommand = null;   
                strExcel = string.Format("select * from [{0}$]", sheetName);
                myCommand = new OleDbDataAdapter(strExcel, strConn);
                myCommand.Fill(ds, sheetName);
  
                //如果目标表不存在则创建,excel文件的第一行为列标题,从第二行开始全部都是数据记录
                string strSql = string.Format("if not exists(select * from sysobjects where name = '{0}') create table {0}(", sheetName);   //以sheetName为表名

                foreach (System.Data.DataColumn c in ds.Tables[0].Columns)
                {   
                    strSql += string.Format("[{0}] varchar(255),", c.ColumnName);   
                }   
                strSql = strSql.Trim(',') + ")";   
  
                using (System.Data.SqlClient.SqlConnection sqlconn = new System.Data.SqlClient.SqlConnection(connectionString))   
                {
                    sqlconn.Open();   
                    System.Data.SqlClient.SqlCommand command = sqlconn.CreateCommand();   
                    command.CommandText = strSql;   
                    command.ExecuteNonQuery();   
                    sqlconn.Close();
                }   
                //用bcp导入数据   
                //excel文件中列的顺序必须和数据表的列顺序一致，因为数据导入时，是从excel文件的第二行数据开始，不管数据表的结构是什么样的，反正就是第一列的数据会插入到数据表的第一列字段中，第二列的数据插入到数据表的第二列字段中，以此类推，它本身不会去判断要插入的数据是对应数据表中哪一个字段的
                using (System.Data.SqlClient.SqlBulkCopy bcp = new System.Data.SqlClient.SqlBulkCopy(connectionString))   
                {   
                    bcp.SqlRowsCopied += new System.Data.SqlClient.SqlRowsCopiedEventHandler(bcp_SqlRowsCopied);   
                    bcp.BatchSize = 100;//每次传输的行数   
                    bcp.NotifyAfter = 100;//进度提示的行数   
                    bcp.DestinationTableName = sheetName;//目标表   
                    bcp.WriteToServer(ds.Tables[0]);
                }   
            }   
            catch (Exception ex)   
            {   
                System.Windows.Forms.MessageBox.Show(ex.Message);   
            } 
        }   
  
        //进度显示   
        void bcp_SqlRowsCopied(object sender, System.Data.SqlClient.SqlRowsCopiedEventArgs e)   
        {   
            this.Text = e.RowsCopied.ToString();   
            this.Update();   
        }  
    }   
}