Add session name to Response.Add header filename

|The below code outputs my gridview to excel.

This works fine but I'd like to know how can I add my session variable to the filename.

E.g

Session("Name") gets added to  filename=CaseloadOutput.xls

so it might say filename=Edj_CaseloadOutput.xls



 

  Protected Sub gtnOExcelOutput_Click(sender As Object, e As EventArgs)
        Response.ClearContent()
        Response.AddHeader("content-disposition", "attachment; filename=CaseloadOutput.xls")
        Response.ContentType = "application/excel"
        Dim sw As New System.IO.StringWriter()
        Dim htw As New HtmlTextWriter(sw)
        gvCaseloadExcel.RenderControl(htw)
        Response.Write(sw.ToString())
        Response.[End]()
    End Sub

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