How to Add multiple Headers to gridview in Asp.Net using C#

Hear i am going to explain how to add multiple Headers to Gridview in ASp.Net using C#
as shown below two examples...

Ex 1:

       protected void ExpGvToPDFControl_RowCreated(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.Header)

            {

                GridView HeaderGrid = (GridView)sender;

                GridViewRow HeaderGridRow = new

               GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Insert);

                TableCell HeaderCell = new TableCell();

                HeaderCell.HorizontalAlign = HorizontalAlign.Center;

                HeaderCell.Text = "Sample Heading When Exporting";

                HeaderCell.ColumnSpan = 8;

                HeaderGridRow.Cells.Add(HeaderCell);

                ExpGvToPDFControl.Controls[0].Controls.AddAt(0, HeaderGridRow);

            }

        }

Ex 2 :

 

       protected void ExpGvToPDFControl_RowCreated(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.Header)

            {

                GridView HeaderGrid = (GridView)sender;

                GridViewRow HeaderGridRow = new

              GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Insert);

                TableCell HeaderCell = new TableCell();

                HeaderCell.HorizontalAlign = HorizontalAlign.Center;

                HeaderCell.Text = "Half Part 1";

                HeaderCell.ColumnSpan = 4;

                HeaderGridRow.Cells.Add(HeaderCell);

                HeaderCell = new TableCell();

                HeaderCell.HorizontalAlign = HorizontalAlign.Center;

                HeaderCell.Text = "Half Part 2";

                HeaderCell.ColumnSpan = 4;

                HeaderGridRow.Cells.Add(HeaderCell);

                ExpGvToPDFControl.Controls[0].Controls.AddAt(0, HeaderGridRow);

            }

       }