有什么不对的ASP.NET code ....？ （数据网格+的ImageButton） [英] What's wrong with this ASP.NET code.... ? (Datagrid + Imagebutton)

问题描述

Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
    If e.CommandName = "Hold" Then
        Dim gvRow As GridViewRow = CType(CType(sender, Control).Parent.Parent, GridViewRow)
        Dim index As Integer = gvRow.RowIndex
        Dim myRow As GridViewRow = GridView1.Rows(index)
        'Find the checkbox
        Dim lab5 As Label = DirectCast(myRow.FindControl("Label5"), Label)
        Dim label2 As Label = DirectCast(myRow.FindControl("Label2"), Label)
        Dim label4 As Label = DirectCast(myRow.FindControl("Label4"), Label)
        Dim label22 As Label = DirectCast(myRow.FindControl("Label22"), Label)
        Me.Response.Redirect("Select_seats.aspx?s_no=" & label22.Text.ToString & "&" & "journey=" & Label6.Text & "&" & "seater=" & label4.Text & "&" & "sleeper=" & label2.Text & "&" & "service=" & lab5.Text.ToString)
    End If
End Sub

这code给错误：

在此行

IM gvRow作为GridViewRow = CTYPE（CTYPE（发件人，控制）.Parent.Parent，GridViewRow）

im gvRow As GridViewRow = CType(CType(sender, Control).Parent.Parent, GridViewRow)

错误：

无法转换类型'ASP.vendors_select_service_aspx对象键入'System.Web.UI.WebControls.GridViewRow。

Unable to cast object of type 'ASP.vendors_select_service_aspx' to type 'System.Web.UI.WebControls.GridViewRow'.

推荐答案

为什么你遍历网格中所有行？因此要重定向的第一行，而不是导致该保留命令的行。在任何控制的 NamingContainer GridViewRow是GridViewRow本身，这就是的FindControl 需要获得关于你的标签。

Why do you iterate all rows in Grid? Therefore you are redirecting on the first row and not on the row that causes the "Hold-Command". The NamingContainer of any control in the GridViewRow is the GridViewRow itself and this is what FindControl needs to get the reference to your labels.

    If e.CommandName = "Hold" Then
        Dim row As GridViewRow = DirectCast(DirectCast(e.CommandSource, Control).NamingContainer, GridViewRow)
        Dim lab5 As Label = DirectCast(row.FindControl("Label5"), Label)
        Dim label2 As Label = DirectCast(row.FindControl("Label2"), Label)
        Dim label4 As Label = DirectCast(row.FindControl("Label4"), Label)
        Dim label6 As Label = DirectCast(row.FindControl("label6"), Label)
        Dim label22 As Label = DirectCast(row.FindControl("Label22"), Label)
        Me.Response.Redirect("Select_seats.aspx?s_no=" & label22.Text.ToString & "&" & "journey=" & label6.Text & "&" & "seater=" & label4.Text & "&" & "sleeper=" & label2.Text & "&" & "service=" & lab5.Text.ToString)
    End If

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