DataAdapter执行批量更新的实例代码

    protected void btnUpdateAddress_Click（object sender, EventArgs e）
    {
    SqlDataAdapter EmpAdapter = new SqlDataAdapter（）；
    DataTable EmpDT = new DataTable（）；
    SqlConnection DBConSelect = new SqlConnection（）；
    SqlConnection DBConUpdate = new SqlConnection（）；
    SqlCommand SelectCommand = new SqlCommand（）；
    SqlCommand UpdateCommand = new SqlCommand（）；
    // Using different connection objects for select and updates from the
    // Northwind database.
    DBConSelect.ConnectionString =
    ConfigurationManager.ConnectionStrings["DSN_NorthWind"].ConnectionString;
    DBConUpdate.ConnectionString =
    ConfigurationManager.ConnectionStrings["DSN_NorthWind"].ConnectionString;
    // Reading all records from the Employees table
    SelectCommand.CommandText = "SELECT 500 FROM EMPLOYEES";
    SelectCommand.CommandType = CommandType.Text;
    SelectCommand.Connection = DBConSelect;

 UpdateCommand.CommandText = " UPDATE EMPLOYEES SET Address=@Address, " +
    "City=@City, Region=@Region, Country=@Country";
    UpdateCommand.CommandType = CommandType.Text;
    UpdateCommand.Connection = DBConUpdate;
    SqlParameter AddressParam;
    AddressParam = new SqlParameter（"@Address",
    SqlDbType.VarChar, 15, "Address"）；
    SqlParameter CityParam;
    CityParam = new SqlParameter（"@City", SqlDbType.VarChar, 15, "City"）；
    SqlParameter RegionParam;
    RegionParam = new SqlParameter（"@Region", SqlDbType.VarChar, 15, "Region"）；
    SqlParameter CountryParam;
    CountryParam = new SqlParameter（"@Country",
    SqlDbType.VarChar, 15, "Country"）；
    UpdateCommand.Parameters.Add（AddressParam）；
    UpdateCommand.Parameters.Add（CityParam）；
    UpdateCommand.Parameters.Add（RegionParam）；
    UpdateCommand.Parameters.Add（CountryParam）；
    // Setting up Data Adapter with the Select and Update Commands
    // The Select mand will be used to retrieve all employee
    // information from the Northwind database and the Update mand
    // will be used to save changes back to the database
    EmpAdapter.SelectCommand = SelectCommand;
    EmpAdapter.UpdateCommand = UpdateCommand;
    EmpAdapter.Fill（EmpDT）；
    DBConSelect.Close（）；
    // Looping through all employee records and assigning them the new
    // address
    foreach （DataRow DR in EmpDT.Rows）
    {
    DR["Address"] = "4445 W 77th Street, Suite 140";
    DR["City"] = "Edina";
    DR["Region"] = "Minnesota";
    DR["Country"] = "USA";
    }
    // Adding an event handler to listen to the RowUpdated event.
    // This event will will fire after each batch is executed
    EmpAdapter.RowUpdated +=  new SqlRowUpdatedEventHandler（OnRowUpdated）；
    lblCounter.Text = "";
    EmpAdapter.UpdateBatchSize = 100;
    // It is important to set this property for batch processing of
    // updated records since batch updates are incapable of
    // updating the source with changes from the database
    UpdateCommand.UpdatedRowSource = UpdateRowSource.None;
    try
    {
    DBConUpdate.Open（）；
    EmpAdapter.Update（EmpDT）；
    }
    catch （Exception ex）
    {
    lblCounter.Text += ex.Message + "<Br>";
    }
    finally
    {
    if （DBConUpdate.State == ConnectionState.Open）
    {
    DBConUpdate.Close（）；
    }
    }
    }
    private void OnRowUpdated（object sender, SqlRowUpdatedEventArgs args）
    {
    lblCounter.Text += "Batch is processed till row number = " +
    args.RowCount.ToString（） + "<br>";
    }