Gridview CommandField验证工作，但没有触发Delete方法

我有一个gridview，我试图从后面的代码验证。在这种情况下，确认记录删除。我的删除方法工作正常，直到我添加验证，当我执行它时，它不会触发删除。Gridview CommandField验证工作，但没有触发Delete方法

要清楚，删除方法正常工作，直到我添加RowDataBound验证。

<asp:CommandField 
     ButtonType="Image" 
     ShowEditButton="true" 
     ShowDeleteButton="true" 
     ShowCancelButton="true" 
     EditImageUrl="~/Images/edit-icon.gif" 
     UpdateImageUrl="~/Images/save-icon.png" 
     CancelImageUrl="~/Images/cancel-icon.png" 
     DeleteImageUrl="~/Images/delete-icon.png" 
     />

以下是相关的方法。

Protected Sub usersGrid_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) 
For Each control As Control In e.Row.Cells(0).Controls 
     Dim DeleteButton As ImageButton = TryCast(control, ImageButton) 
     If DeleteButton IsNot Nothing AndAlso DeleteButton.CommandName = "Delete" Then 
      DeleteButton.OnClientClick = "return(confirm('Are you sure you want to delete this user?\nThis cannot be undone!'))" 
     End If 
    Next 
End Sub 

Protected Sub usersGrid_RowDeleting(ByVal sender As Object, ByVal e As GridViewDeleteEventArgs) 
    Dim userID As Integer = DirectCast(usersGrid.DataKeys(e.RowIndex).Value, Integer) 

    usersGrid_Delete(userID) 
    BindData() 
End Sub 

Protected Sub usersGrid_Delete(ByVal userID As Integer) 
    Dim con As New SqlConnection(connectionString) 
    Dim cmd As New SqlCommand("MAINT_DIST_DELETE_USER", con) 
    cmd.CommandType = CommandType.StoredProcedure 
    cmd.Parameters.AddWithValue("@userID", userID) 

    Try 
     con.Open() 
     cmd.ExecuteNonQuery() 
    Catch Ex As Exception 
     Throw Ex 
    Finally 
     con.Close() 
    End Try 
End Sub

来源

2011-11-21 John Kinane

这个问题不是很清楚。当你说“它不会触发删除”时，会发生错误吗？ RowDeleting或RowDataBound事件不会触发吗？ – jadarnel27

不，没有发生错误。如果我省去了RowDataBound中使用的验证，则会按预期进行删除。如果我离开这个方法，没有任何反应。没有错误，但删除不会发生。 –

您可以使用下面的代码（我希望你知道C＃足以将其翻译成VB.NET）：

void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    if (e.Row.RowType == DataControlRowType.DataRow) 
    { 
     var deleteButton = e.Row.Cells[0].Controls.OfType<ImageButton>().FirstOrDefault(btn => btn.CommandName == "Delete"); 
     if (deleteButton != null) 
     { 
      deleteButton.OnClientClick = 
       string.Format("javascript:if(confirm('Are you sure you want to delete this user? This cannot be undone!')){{ __doPostBack('{0}', 'Delete${1}');}} return false;", GridView1.UniqueID, e.Row.RowIndex); 
     } 
    } 
}

的原因是，ImageButton控件使用onclick属性火回传，而你代码完全删除它的默认值，回发没有发生。

来源

2011-11-21 16:14:35

其实我是一个C＃人被迫使用VB，所以谢谢;-) –

Gridview CommandField验证工作，但没有触发Delete方法

回答

相关问题