Hello,

   does anybody know how I can add an additional row above
the datagrid header?

Here's some code to show two headers:

   <asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False"
ShowHeader="False">
    <Columns>
     <asp:BoundColumn DataField="Subject"></asp:BoundColumn>
     <asp:BoundColumn DataField="Day"></asp:BoundColumn>
    </Columns>
   </asp:DataGrid>


    Dim dt As DataTable
    Private Sub Page_Load _
    (ByVal sender As System.Object, _
    ByVal e As System.EventArgs) _
    Handles MyBase.Load
        DataGrid1.ShowHeader = True
        DataGrid1.DataSource = CreateDataSource()
        DataGrid1.DataBind()
    End Sub
    Private Sub DataGrid1_ItemDataBound _
    (ByVal sender As Object, _
    ByVal e As _
    System.Web.UI.WebControls.DataGridItemEventArgs) _
    Handles DataGrid1.ItemDataBound
        ' Add a second header with a flag button in it
        ' by Ken Cox Microsoft MVP [ASP.NET]
        If e.Item.ItemType = ListItemType.Header Then
            ' Get the collection of cells from the grid
            Dim tcells As TableCellCollection
            ' Create an imagebutton
            Dim imgBtn As New ImageButton
            ' Assign the URL
            imgBtn.ImageUrl = "http://www.gc.ca/images/flag.gif"
            ' Get the collection of existing cells so we can get a count
            tcells = e.Item.Cells
            ' Create a new cell
            Dim fcell As New TableCell
            ' Add the image button to the new table cell
            fcell.Controls.Add(imgBtn)
            ' Span the cell to however many columns there are
            fcell.ColumnSpan = tcells.Count
            ' Create a new header object
            Dim dgItemHeader As New DataGridItem _
            (0, 0, ListItemType.Header)
            ' Add the cell to the header
            dgItemHeader.Cells.Add(fcell)
            dgItemHeader.Visible = True
            ' Add the header to the datagrid
            DataGrid1.Controls(0).Controls.Add(dgItemHeader)
        End If
    End Sub
    Function CreateDataSource() As ICollection
        ' Create sample data for the DataList control.
        dt = New DataTable
        Dim dr As DataRow

        ' Define the columns of the table.
        dt.Columns.Add(New DataColumn("Student", GetType(String)))
        dt.Columns.Add(New DataColumn("Subject", GetType(String)))
        dt.Columns.Add(New DataColumn("Day", GetType(String)))

        ' Populate the table with sample values.
        dr = dt.NewRow
        dr(0) = "Ben"
        dr(1) = "English"
        dr(2) = "Thursday"
        dt.Rows.Add(dr)
        dr = dt.NewRow
        dr(0) = "Ben"
        dr(1) = "Geology"
        dr(2) = "Monday"
        dt.Rows.Add(dr)
        dr = dt.NewRow
        dr(0) = "Ben"
        dr(1) = "Physics"
        dr(2) = "Tuesday"
        dt.Rows.Add(dr)
        Dim dv As DataView = New DataView(dt)
        Return dv
    End Function

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Many thanks Ken,

   how about if I want to add an additional row beneath
each exising row?

Any Idea how I can do that? I tried it, but it showed me
that the message:

Server Error in '/intranet' Application.

Thanks

DataField="Subject"></asp:BoundColumn>
Show quoteHide quote= "http://www.gc.ca/images/flag.gif"
can get a count
Show quoteHide quote

I mean it was showing me the error:

Specified argument was out of the range of valid values.
Parameter name: index

Controls(0).Controls.AddAt(2, dgItem)

Sorry, pasted the wrong statement in the previous messahe.

DataField="Subject"></asp:BoundColumn>
Show quoteHide quote= "http://www.gc.ca/images/flag.gif"
can get a count
Show quoteHide quote

Check out this article
http://www.extremeexperts.com/Net/Articles/ExtendingDataGrid.aspx

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