Row Numbers

By default, RadGridView displays a current row indicator in the row header represented by an arrow image. A common requirement is to display the row number in the row header as well. This can be easily achieved by handling the ViewCellFormatting event. You can find below a sample code snippet.

Figure 1: Row numbers

gridview-cells-formatting-row-numbers 001

Handling the ViewCellFormatting event

private void radGridView1_ViewCellFormatting(object sender, CellFormattingEventArgs e)
    if (e.CellElement is GridRowHeaderCellElement && e.Row is GridViewDataRowInfo)
        e.CellElement.Text = (e.CellElement.RowIndex + 1).ToString();
        e.CellElement.TextImageRelation = TextImageRelation.ImageBeforeText;
        e.CellElement.ResetValue(LightVisualElement.TextImageRelationProperty, ValueResetFlags.Local);

Private Sub radGridView1_ViewCellFormatting(sender As Object, e As CellFormattingEventArgs)
    If TypeOf e.CellElement Is GridRowHeaderCellElement AndAlso TypeOf e.Row Is GridViewDataRowInfo Then
        e.CellElement.Text = (e.CellElement.RowIndex + 1).ToString()
        e.CellElement.TextImageRelation = TextImageRelation.ImageBeforeText
        e.CellElement.ResetValue(LightVisualElement.TextImageRelationProperty, ValueResetFlags.Local)
    End If
End Sub

It is necessary to increase the header row's width in order to have enough space to display the row number and the current row indicator. This can be accomplished by setting the TableElement.RowHeaderColumnWidth property.

Adjust the RowHeaderColumnWidth

this.radGridView1.TableElement.RowHeaderColumnWidth = 50;

Me.RadGridView1.TableElement.RowHeaderColumnWidth = 50

See Also

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