Export To Excel(Gridview): Result of 1-4 or 1/4 changes to month in excel Why?

See more:

ASP.NET

MS-Excel

Gridview

hy
Q1: i am exporting data from gridview .Its working fine
I use the code from here only .
But on a text value of 1/4 or 1-3 results in Month result
If its 1/14 or 1-15 its remain same.

So how to Control this ...... I have to use 1/4 or 1-6.. type as some specific value and meaning
I know that 1/14 is not a month value so it remains same but i have to make 1/4 to be same ?

Plz Give a look on This question?

Q2: Another question In Excel sheet its come under in white background ? How to give it a Excel look?

By Export function here

public class GridViewExportUtil
{
       public static void Export(string fileName, GridView gv)
    {
       HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", fileName));
        HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
        string data ;
        using (StringWriter sw = new StringWriter())
        {
            using (HtmlTextWriter htw = new HtmlTextWriter(sw))
            {
                //  Create a form to contain the grid
                Table table = new Table();
                table.GridLines = GridLines.Both;

                //  add the header row to the table
                if (gv.HeaderRow != null)
                {
                    GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                    table.Rows.Add(gv.HeaderRow);
                }
                //  add each of the data rows to the table
                foreach (GridViewRow row in gv.Rows)
                {
                    GridViewExportUtil.PrepareControlForExport(row);
                    table.Rows.Add(row);
                }
                //  add the footer row to the table
                if (gv.FooterRow != null)
                {
                  GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                    table.Rows.Add(gv.FooterRow);
                }

                //  render the table into the htmlwriter
                table.RenderControl(htw);

                //  render the htmlwriter into the response
                HttpContext.Current.Response.Write(sw.ToString());
                HttpContext.Current.Response.End();
            }
        }
    }
  
    private static void PrepareControlForExport(Control control)
    {
        for (int i = 0; i < control.Controls.Count; i++)
        {
            Control current = control.Controls[i];
            if (current is LinkButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
            }
            else if (current is ImageButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
            }
            else if (current is Label )
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as Label).Text ));
            }
            else if (current is HyperLink)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
            }
            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 Image)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i, new LiteralControl((current as Image ).AlternateText ));
            }


            if (current.HasControls())
            {
                GridViewExportUtil.PrepareControlForExport(current);
            }
        }
    }
}