Question

您好我正在使用gridview控件来显示数据。点击gridview特定行我想获得那行ID。

为此，我使用了这段代码：

 Protected Sub grdReport_SelectedIndexChanged(sender As Object, e As EventArgs) Handles grdReport.SelectedIndexChanged
             Dim row As GridViewRow = Me.grdReport.SelectedRow

        Dim InvoiceId As Integer = Convert.ToInt32(grdReport.DataKeys(row.RowIndex).Value)
        Session("InvoiceId") = InvoiceId


 End Sub

Protected Sub grdReport_RowCreated(sender As Object, e As GridViewRowEventArgs) Handles grdReport.RowCreated
        If e.Row.RowType = DataControlRowType.DataRow Then

            e.Row.Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(Me.grdReport, "Select$" + e.Row.RowIndex.ToString()))

        End If
    End Sub


Protected Overrides Sub Render(ByVal writer As HtmlTextWriter)
    Dim gvr As GridViewRow
    For Each gvr In grdReport.Rows
        gvr.Attributes("onclick") = ClientScript.GetPostBackClientHyperlink(
                grdReport,
                String.Concat("Select$", gvr.RowIndex),
                True)
    Next

    MyBase.Render(writer)
End Sub

上面的代码对我来说工作正常，但每当我点击gridview行然后再次加载页面并且页面变慢。

请让我知道我能做什么，这样整个页面就不会一次又一次地加载行。

Answer 1

首先，如果您想要对鼠标onClick事件做出反应，那么selectedindexchanged不是一个好事。

在填充数据

时，始终对网格中的每一行执行selectedindexchanged

所以如果你有100行，代码会在你看到网格之前被执行100次

我建议使用cellmousedown或cellmouseclick

Private Sub DataGridView_CellMouseDown(sender As System.Object, e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView.CellMouseDown

    If e.Button = Windows.Forms.MouseButtons.Left And e.RowIndex <> -1 And e.ColumnIndex <> -1 Then

Dim InvoiceId As Integer =  DataGridView.Rows(e.RowIndex).Cells("InvoiceId").value

End Sub

对于您的重新编码问题，我猜它与您的渲染子调用

有关

imho对于你想要完成的简单任务是不必要的

gridview行选择每次加载页面

1 个答案: