Question

If a have a lable called: lblWarning. I’d like to display it (Visible = True) when the detail band does not have any records. The label is in the group footer.

Answer 1

This event is attached to the report itself (in my example, it’s named XtraReport1). GetCurrentRow() is a method on XtraReportBase that returns the current data from the primary report binding source. If data does not exist, it returns null.

private void XtraReport1_BeforePrint(object sender, PrintEventArgs e)
{
    bool noDataFound = GetCurrentRow() == null;

    lblWarning.Visible = noDataFound;
}

The same handler in VB:

Private Sub XtraReport1_BeforePrint(ByVal sender As System.Object, ByVal e As PrintEventArgs) Handles MyBase.BeforePrint
    Dim noDataFound As Boolean = GetCurrentRow() Is Nothing

    lblWarning.Visible = noDataFound
End Sub