有效地将excel导入sqlserver的方法

using System; 
using System.Data; 
using System.Windows.Forms; 
using System.Data.OleDb; 
namespace WindowsApplication2 
{ 
public partial class Form1 : Form 
{ 
public Form1() 
{ 
InitializeComponent(); 
} 

private void button1_Click(object sender, EventArgs e) 
{ 
//测试，将excel中的sheet1导入到sqlserver中 
string connString = "server=localhost;uid=sa;pwd=sqlgis;database=master"; 
System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog(); 
if (fd.ShowDialog() == DialogResult.OK) 
{ 
TransferData(fd.FileName, "sheet1", 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 
string strSql = string.Format("if object_id('{0}') is null create table {0}(", sheetName); 
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 
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(); 
} 


} 
}