点击按钮进入按钮给出不同的结果

时间:2013-05-24 09:36:58

标签: asp.net vb.net button datagrid onclick

我有功能从datagridview导出到Excel,我通过按下选项卡尝试点击界面上的每个按钮,找到每个按钮的指示器。但是当出口按钮时。它给我一个错误

DataGrid with id '' could not automatically generate any columns from the selected data source.

但是当我用指针/鼠标点击它时,它可以正常工作。

这是我导出到Excel代码:

Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExport.Click

        Dim dt As New DataTable
        If CInquiry.SearchInquiry(txtAccount.Text, txtCustName.Text, txtAmount.Text, dropResponse.SelectedValue.ToString, txtInquiryDate.Text) Then
            dt = CInquiry.DT
        Else
            eMessage(CInquiry.eMsg)
        End If
        Dim DataGrd As New DataGrid()
        DataGrd.DataSource = dt.DefaultView
        DataGrd.DataBind()

        Dim attachment As String
        attachment = "attachment; filename=Inquiry_Report" & Format(Now, "ddMMMyyyy") & ".xls"
        Response.Buffer = True
        Response.ClearContent()
        Response.ClearHeaders()
        Response.AddHeader("content-disposition", attachment)
        Response.ContentType = "application/ms-excel"
        Dim sw As New StringWriter()
        Dim htw As New HtmlTextWriter(sw)
        DataGrd.RenderControl(htw)
        Response.Write(sw.ToString())
        Response.End()
    End Sub

错误是当datagrid尝试绑定数据时,只有当我按上述方式执行操作时才会引发错误。怎么了?它只是通过指针/鼠标点击它的平均点击吗?

1 个答案:

答案 0 :(得分:0)

嗨,实际上我现在不用VB代码,但我可以发布可以帮助你的c#代码

 protected void lnkfiledownload_Click(object sender, EventArgs e)
    {

        string attachment = "attachment; filename=notification.xls";

        Response.ClearContent();

        Response.AddHeader("content-disposition", attachment);

        Response.ContentType = "application/ms-excel";

        StringWriter sw = new StringWriter();

        HtmlTextWriter htw = new HtmlTextWriter(sw);

        // Create a form to contain the grid

        HtmlForm frm = new HtmlForm();

        gvBranchNotification.Parent.Controls.Add(frm);

        frm.Attributes["runat"] = "server";

        frm.Controls.Add(gvBranchNotification);

        frm.RenderControl(htw);



        Response.Write(sw.ToString());

        Response.End();

    }