Vb.net 導出 gridview 到 excel

Question

我無法將我的 gridview 導出到 excel 文件。 一切正常，除了當我點擊導出按鈕時，應該導出到 excel 文件的數據顯示在網頁上。 我懷疑這是 Response.ContentType 和我指定的文件名的問題。 但是，我已經閱讀了多個文檔和示例，在我的案例中，這兩個似乎不是根本問題。 任何人都可以幫忙嗎？

<asp:Button ID="btnExport" runat="server" Text="Export To MS Excel File" CssClass="btnMain" OnClick="btnExport_Click" />    




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

        Dim filename As String = "PerformanceEval Status Report" & Date.Now.Year.ToString & "-" & _
                                    formatNumberTo2Digits(DateTime.Now.Month) & "-" & formatNumberTo2Digits(DateTime.Now.Day) & ".xls"

        With Page.Response

            .Clear()
            .Buffer = True
            .AddHeader("content_disposition", "attachment;filename" & filename)
            .Charset = ""

            '--to open the Excel file without saving then comment out the line below
            '.Cache.SetCacheability(HttpCacheability.NoCache)

            '.ContentType = "application/vnd.xls"   'data appears on web page 
            '.ContentType = "application/vnd.ms-excel"  'try to download .aspx document NOT .xml
            .ContentType = "application/ms-excel"  'data appears on web page 

        End With


        Dim strWriter As New System.IO.StringWriter
        Dim htmlWriter As System.Web.UI.HtmlTextWriter = New HtmlTextWriter(strWriter)

        Dim gvexport As GridView = New GridView
        gvexport.AutoGenerateColumns = False
        gvexport.CssClass = "gridData"
        gvexport.GridLines = GridLines.Horizontal
        gvexport.HeaderStyle.CssClass = "gridHeader"
        gvexport.RowStyle.CssClass = "gridRow"
        gvexport.AlternatingRowStyle.CssClass = "gridRow_Alt"
        gvexport.FooterStyle.CssClass = "gridFooter"

        Dim dv As DataView = New DataView(Me.ds.Tables(0))  'default is sorted by last name
        'Dim dv As DataView = New DataView(Me.ds.Tables(0))
        dv.RowFilter = GetFilter()

        '-- add columns for report
        addGVcolumn("Employee Name", "EmployeeName", gvexport, -1, HorizontalAlign.Left)
        addGVcolumn("Employee ID", "SID", gvexport, -1, HorizontalAlign.Left)
        addGVcolumn("Email", "WorkEmail", gvexport, -1, HorizontalAlign.Left)
        addGVcolumn("StatusID", "StatusID", gvexport, 50, HorizontalAlign.Center)

        gvexport.DataSource = dv
        gvexport.DataBind()

        gvexport.RenderControl(htmlWriter)

        Response.Output.Write(strWriter.ToString())

        Response.Flush()
        Response.End()

同樣，我能夠生成內容，但無法將我的數據導出到 excel。 非常感謝！

Answer 1

你給出了錯誤的標題：

.AddHeader "content-disposition", "attachment; filename="& filename &";"