Response.ContentType or Response.AddHeader Issue

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ASP.NET

Gridview

AlertDialog

Dear All,

I have a label named "lblExportStatus" that is hidden with no text. I want to display the label during Gridview export to excel.

The label is being displayed after below 3 statements

Response.Clear();
                Response.Buffer = true;
                Response.Charset = "";
                lblExportStatus.Visible = true;
                lblExportStatus.Text = "Export Successful";

But when I write Response.ContentType, Response.AddHeader as below,

Response.Clear();
               Response.Buffer = true;
               Response.Charset = "";
               Response.ContentType = "application/vnd.ms-excel";
               Response.AddHeader("content-disposition", "attachment;filename=Test.xls");
               lblExportStatus.Visible = true;
               lblExportStatus.Text = "Export Successful";

Label is not getting displayed on the page. Any help or suggestion would be appreciable.

Regards,