引自http://blog.csdn.net/JonesVale/archive/2009/07.aspx

 

大部分人都知道用oledb來讀取數(shù)據(jù)到dataset,，但是讀取之后怎么處理dataset就千奇百怪了,。很多人通過循環(huán)來拼接sql,，這樣做不但容易出錯而且效率低下,，System.Data.SqlClient.SqlBulkCopy 對于新手來說還是比較陌生的,，這個就是傳說中效率極高的bcp,，6萬多數(shù)據(jù)從excel導入到sql只需要4.5秒,。
Code:
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)
{
//測試，將excel中的sheet1導入到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
{
//獲取全部數(shù)據(jù)
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);

//如果目標表不存在則創(chuàng)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導入數(shù)據(jù)
using (System.Data.SqlClient.SqlBulkCopy bcp = new System.Data.SqlClient.SqlBulkCopy(connectionString))
{
bcp.SqlRowsCopied += new System.Data.SqlClient.SqlRowsCopiedEventHandler(bcp_SqlRowsCopied);
bcp.BatchSize = 100;//每次傳輸?shù)男袛?shù)
bcp.NotifyAfter = 100;//進度提示的行數(shù)
bcp.DestinationTableName = sheetName;//目標表
bcp.WriteToServer(ds.Tables[0]);
}
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show(ex.Message);
}

}

//進度顯示
void bcp_SqlRowsCopied(object sender, System.Data.SqlClient.SqlRowsCopiedEventArgs e)
{
this.Text = e.RowsCopied.ToString();
this.Update();
}
}
}
上面的TransferData基本可以直接使用,，如果要考慮周全的話,，可以用oledb來獲取excel的表結構，并且加入ColumnMappings來設置對照字段,，這樣效果就完全可以做到和sqlserver的dts相同的效果了,。

本文來自CSDN博客，轉載請標明出處：http://blog.csdn.net/JonesVale/archive/2009/07/13/4343247.aspx