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vb.netdevexpressxtrareport

DevExpress Xtra Report: How to display a label in group footer when the detail band does not have any data?

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.

Solution

  • 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