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ASP.NET WebForms - How to set colspan for header row in the GridView?

Answer 1

A:

Take a look at: http://aspnet.4guysfromrolla.com/articles/072603-1.aspx
I think that's what you're looking for.
UPDATE: Found some other sources.
http://netindonesia.net/blogs/irwansyah/archive/2007/06/05/Merge-GridView-Header.aspx
http://netindonesia.net/blogs/irwansyah/archive/2007/06/05/Merge-GridView-Header.aspx
This post explains exactly what you're trying to achieve. (and more)

Kamyar 2010-10-19 07:27:47

Answer 2

A:

Following code help you to

  protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
        {

            //Build custom header.
            GridView oGridView = (GridView)sender;
            GridViewRow oGridViewRow = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Insert);


            TableHeaderCell oTableCell = new TableHeaderCell();
            oTableCell.Text = "Agent Id/ Outcome";
            oTableCell.ColumnSpan = 1;
            oGridViewRow.Cells.Add(oTableCell);


            for (int j = 0; j < totalOutcome; j++)
            {
                oTableCell = new TableHeaderCell();

                oTableCell.Text = dsOutcome.Tables[0].Rows[j]["outcome"].ToString();
                oTableCell.ColumnSpan = 2;
                oGridViewRow.Cells.Add(oTableCell);
            }
            oGridView.Controls[0].Controls.AddAt(0, oGridViewRow);

            for (int i = 0; i < e.Row.Cells.Count; i++)
            {
                if (i == 0)
                    e.Row.Cells[i].Text = "";
                else if (i % 2 == 0)
                    e.Row.Cells[i].Text = "%";
                else
                    e.Row.Cells[i].Text = "Calls";
            }
        }
    }

Pranay Rana 2010-10-19 07:32:12

Answer 3

A:

I attached to the PreRender event:

protected void GridView1_PreRender(object sender, EventArgs e)
{
    var gridView = (GridView) sender;
    var header = (GridViewRow) gridView.Controls[0].Controls[0];

    header.Cells[0].Visible = false;
    header.Cells[1].ColumnSpan = 2;
    header.Cells[1].Text = "Header";
}

šljaker 2010-10-22 09:03:26

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ASP.NET WebForms - How to set colspan for header row in the GridView?

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