网格值删除异常

Question

我正在尝试使用以下代码从 VB.NET 中的网格中删除值：

 Protected Sub gv_RowDeleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles gv.RowDeleting

            Dim index As Integer = gv.EditIndex

            Dim row As GridViewRow = DirectCast(gv.Rows(e.RowIndex), GridViewRow)

            Dim id As Integer = Convert.ToInt32(gv.DataKeys(e.RowIndex).Value.ToString())

            'Dim Id As Integer = Integer.Parse(DirectCast(gv.Rows(e.RowIndex).FindControl("txtId"), TextBox).Text)

            gc.ExecuteCommand("delete from expence where id= '" & Id & "' ")

            Response.Write("<script type='text/javascript' language='javascript'>alert('Data Updated')</script>")

            gv.EditIndex = -1

            bindGrid()


        End Sub

Dim id As Integer = Convert.ToInt32(gv.DataKeys(e.RowIndex).Value.ToString()) 线上的例外情况如下：

Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

我不知道为什么会出现这个异常。

请帮帮我。

Answer 1

我认为你还没有在 gridview 中定义 DataKeys 属性，你应该在你的 gridview 中定义 DataKeys="id" ..