ASP.NET DataGrid to Excel File or Word File

EXCEL

Response.Clear()
        Dim DosyaAdi As String = "Blog"
        Response.AddHeader("content-disposition", "attachment;filename=" & DosyaAdi & ".xls")
        Response.ContentType = "application/vnd.xls"
        Response.Charset = "1254"
        Dim stringWrite As New System.IO.StringWriter()
        Dim htmlWrite As New HtmlTextWriter(stringWrite)
        DWGunlukAyrinti.RenderControl(htmlWrite)
        Response.Write(stringWrite.ToString())
        Response.End()

WORD

Response.Clear()
        Dim DosyaAdi As String = "Blog"
        Response.AddHeader("content-disposition", "attachment;filename=" & DosyaAdi & ".doc")
        Response.ContentType = "application/vnd.doc"
        Response.Charset = "1254"
        Dim stringWrite As New System.IO.StringWriter()
        Dim htmlWrite As New HtmlTextWriter(stringWrite)
        DWGunlukAyrinti.RenderControl(htmlWrite)
        Response.Write(stringWrite.ToString())
        Response.End()

Buarada asagidaki olayida eklememiz gerekiyor

  Public Overrides Sub VerifyRenderingInServerForm(ByVal control As System.Web.UI.Control)
    End Sub