可以使用SQL Server中的連接操作更新兩個表嗎？

Question

在我的web應用程序中使用asp.net我有一個帶編輯按鈕的gridview。這個gridview是通過連接兩個表而創建的。當我點擊這些編輯按鈕時，我需要更新這兩個表格。 我的gridview包含3個字段 - 名稱，nric和status.where表1中的名稱和nric以及來自table2的狀態。查詢如何更新兩個表？ 請幫忙

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) 
{ 
    GridView1.EditIndex = -1; 
} 
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
{ 
    GridView1.EditIndex = e.NewEditIndex; 
} 
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) 
{ 
    GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex]; 

    TextBox id = (TextBox)row.FindControl("s_id"); 
    TextBox name = (TextBox)row.FindControl("s_name"); 
    TextBox nric = (TextBox)row.FindControl("s_nric"); 
    TextBox status = (TextBox)row.FindControl("s_status"); 
    SqlConnection con = obj.getcon(); 
    con.Open(); 
    SqlCommand cmd = new SqlCommand("update e.student_details ,f.student_vs_testsession_details set e.student_id='" + id.Text+ "',e.student_name='" + name.Text + "',e.student_nric='" + nric.Text + "',f.testsession_status='" + status.Text + "' where e.student_id=f.student_id", con); 
    cmd.ExecuteNonQuery(); 
    con.Close(); 


} 

Answer 1

您的連接查詢將會與它相同。 [根據您的數據庫表結構，你沒有指定]對於GridView的編輯操作有如下的事情：

你必須處理3個事件：

RowEditing，RowCancelingEdit，RowUpdating

以下是代碼：

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
{ 
    GridView1.EditIndex = e.NewEditIndex; 

} 


protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) 
{ 
    e.Cancel = true; 
    GridView1.EditIndex = -1; 

} 

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) 
{ 
    GridViewRow row = GridView1.Rows[e.RowIndex]; 

    TextBox txtProductName = (TextBox)row.FindControl("txtProductName"); 
    TextBox txtUnitPrice = (TextBox)row.FindControl("txtUnitPrice"); 

    //From here you can fire Update query on database. 

} 

參考鏈接：

http://www.ezzylearning.com/tutorial.aspx?tid=1993146

希望它有幫助。

Answer 2

Divya，這是可能的。當你點擊更新按鈕時，你的網格變量將更新的數據傳遞給數據庫，但在這裏你需要激發不同的更新語句。讓我知道如果你有進一步的查詢....只是試試這個....！

Answer 3

@Divya Hari：您可以通過存儲過程來完成此任務。

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) 
{ 
    GridViewRow row = GridView1.Rows[e.RowIndex]; 

    TextBox txtName = (TextBox)row.FindControl("txtName"); 
    TextBox txtstatus = (TextBox)row.FindControl("txtstatus"); 

    //  From here you can fire Update query on database. 
    // Here you write code for store procedure. 


} 

存儲過程。

in SP you need to write update query for both table. Something like this. 


SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE PROCEDURE UpdateBothTable 
    @ID int, 
    @Name varchar(50), 
    @Status varchar(10) 
AS 
BEGIN 
    -- SET NOCOUNT ON added to prevent extra result sets from 
    -- interfering with SELECT statements. 
    SET NOCOUNT ON; 

    -- Insert statements for procedure here 
    Update table1 set Name=@Name where ID=@ID 

    Update Table2 set Status=@Status where ID=@ID 


END 
GO 

希望這將幫助你.... :)