Protect Excel Cell When I Export Griddata Using C#

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C#

ASP.NET

hi,

When i export griddata to excel at that time some column values need to uneditable.
how can i do it??


My code for export is below,

grdExport.DataSource = ds.Tables[0];
grdExport.DataBind();


Response.ClearContent();
Response.ContentType = "application/excel";
Response.AddHeader("content-disposition", "attachment; filename=out.xls");
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
grdExport.RenderControl(htw);
Response.Write(sw.ToString());
Response.Flush();
Response.End();