Print selected data of gridview using javascript

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ASP.NET

I am working in ASP.Net project.
I have one gridview and data is bound from codebehind cs file. In some of the columns I am showing them links to open popup & also data.
Now my task is to print the gridview but i dont want to show those licks in print. It should print only data that is available otherwise blank cell.
My code is as below:

protected void btnPrint_Click(object sender, EventArgs e) 
    { 
  
        using (StringWriter sw = new StringWriter()) 
        { 
            using (HtmlTextWriter htw = new HtmlTextWriter(sw)) 
            { 
                // Create a form to contain the grid                 
                Table table = new Table(); 
                grdAudit.GridLines = GridLines.Both; 
                table.GridLines = grdAudit.GridLines; 
  
                // add the header row to the table                  
                if (grdAudit.HeaderRow != null) 
                { 
                    PrepareControlForExport(grdAudit.HeaderRow); 
                    table.Rows.Add(grdAudit.HeaderRow); 
                } 
                //add each of the data rows to the table           
                foreach (GridViewRow row in grdAudit.Rows) 
                { 
                    row.BorderColor = System.Drawing.Color.Black; 
                    row.BorderWidth = 1; 
                    int cnt = row.Cells.Count; 
  
                    PrepareControlForExport(row); 
                    for (int i = 0; i < cnt; i++) 
                    { 
                        row.Cells[i].BorderColor = System.Drawing.Color.Black; 
                        row.Cells[i].BorderWidth = 1; 
                    } 
                    table.Rows.Add(row); 
                } 
                // add the footer row to the table  
  
                if (grdAudit.FooterRow != null) 
                { 
                    PrepareControlForExport(grdAudit.FooterRow); 
                    table.Rows.Add(grdAudit.FooterRow); 
                } 
  
                // render the table into the htmlwriter                   
                table.RenderControl(htw); 
                string data = sw.ToString(); 
  
                table.Attributes["runat"] = "server"; 
                table.Attributes["class"] = "print"; 
                table.Attributes["rule"] = "all"; 
                table.BorderColor = System.Drawing.Color.Black; 
                table.GridLines = GridLines.Both; 
  
                table.ID = "grdTable"; 
  
                ContentPlaceHolder pageContent = Page.Master.FindControl("ContentPlaceHolder1") as ContentPlaceHolder; 
                HtmlControl pageC = pageContent.FindControl("divPrint") as HtmlControl; 
                pageC.Controls.Add(table); 
  
  
                StringBuilder sb = new StringBuilder(); 
                sb.Append("<script type = 'text/javascript'>"); 
                sb.Append("window.onload = new function(){");                
                sb.Append("var prtContent = document.getElementById('" + table.ClientID + "');"); 
                sb.Append("prtContent.border = \"1px solid #000\";"); 
                sb.Append("var printWin = window.open('', '','left=0,top=0,width=1000,height=600,status=0,scrollbars=1');");                
                sb.Append("printWin.document.write(prtContent.outerHTML);"); 
                sb.Append("printWin.document.close();"); 
                sb.Append("printWin.focus();"); 
                sb.Append("printWin.print();"); 
                sb.Append("printWin.close();};"); 
                sb.Append("};"); 
                sb.Append("</script>"); 
  
                ScriptManager.RegisterStartupScript(btnPrint, this.GetType(), "PrintNewButton", sb.ToString(), false); 
  
  
            } 
        } 
  
    } 
  
  
  
private void PrepareControlForExport(Control control) 
    { 
        for (int i = 0; i < control.Controls.Count; i++) 
        { 
  
            Control current = control.Controls[i]; 
  
           if(current.Visible == false)  
               control.Controls.Remove(current); 
            else if (current is LinkButton) 
            { 
                control.Controls.Remove(current);   
            } 
           else if (current is HtmlAnchor ) 
           { 
               control.Controls.Remove(current);                              
           } 
            else if (current is ImageButton) 
            { 
                control.Controls.Remove(current); 
                control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText)); 
            } 
            else if (current is HyperLink) 
            { 
                control.Controls.Remove(current);                              
            } 
            else if (current is DropDownList) 
            { 
                control.Controls.Remove(current); 
                control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text)); 
            } 
            else if (current is CheckBox) 
            { 
                control.Controls.Remove(current); 
                control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False")); 
            } 
            else if (current is HiddenField) 
            {  
                control.Controls.Remove(current); 
                string text =(current as HiddenField).Value; 
                if(text != "Select Region") 
                    control.Controls.AddAt(i, new LiteralControl((current as HiddenField).Value ));                 
  
            } 
            if (current.HasControls()) 
            { 
                PrepareControlForExport(current); 
            } 
        }      
    } 

This code is working fine except below issues:
1. in print it shows the border for only those cells which have data otherwise it shows as plane paper w/o any gridlines
2.sometimes i get jaavscript error while registering the script in below line

ScriptManager.RegisterStartupScript(btnPrint, this.GetType(), "PrintNewButton", sb.ToString(), false);

It shows error in scriptresource.axd file at line (syntax may be wrong written here)

documnet.getelementbytag("HEAD")[0].appendshild(scriptelement)

Please help me.

Thanks & Regards,
Anu