TextFormatEventArgs Class

Provides data for the XRLabel.SummaryCalculated event.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v19.2.dll

NuGet Package: DevExpress.Reporting.Core

Declaration

C#

public class TextFormatEventArgs :
    EventArgs

VB.NET

Public Class TextFormatEventArgs
    Inherits EventArgs

Related API Members

TextFormatEventArgs is the data class for the following events:

• XRLabel.SummaryCalculated

Remarks

The XRLabel.SummaryCalculated event occurs when the automatic summary value of a label has been calculated. A TextFormatEventArgs specifies the calculated summary TextFormatEventArgs.Value, and its TextFormatEventArgs.Text representation with the string TextFormatEventArgs.Format applied.

Example

This example demonstrates how to use the XRLabel.SummaryCalculated event for a label control. In this example, the report’s dataset contains two related tables. The Categories table is bound to the main report, and the Products table is used as the DetailReport’s data source, which gives a list of products by categories.

The detail report calculates the sum of the UnitPrice column for each product. This summary is calculated automatically. The grand total of the UnitPrice summaries must be displayed in the main report. You have to write your own code to calculate this kind of summary. It cannot be calculated automatically, because the UnitPrice column does not belong to the main report’s data source.

You should handle the SummaryCalculated event of summary labels in your detail report. Please note that when the BeforePrint event is fired, a summary value has not yet been calculated; you should use SummaryCalculated to obtain a calculated summary value. The summaries of individual detail reports are incremented in a global variable (GrandTotals), which is then printed in the main report’s footer.

C#

using System.Drawing.Printing;
using DevExpress.XtraReports.UI;
// ...

// Grand total value.
double GrandTotals = 0;

// Add the summary value to the grand total.
private void lbUnitPriceTotal_SummaryCalculated(object sender, TextFormatEventArgs e) {
   if(e.Value != null)
      GrandTotals += Convert.ToDouble(e.Value);
}

// Set the grand total value to the label's text.
private void lbUnitPriceGrandTotal_BeforePrint(object sender, PrintEventArgs e) {
   ((XRLabel)sender).Text = GrandTotals.ToString();
}

VB.NET

Imports System.Drawing.Printing
Imports DevExpress.XtraReports.UI
' ...

' Grand total value.
Dim GrandTotals As Double = 0

' Add the summary value to the grand total.
Private Sub OnSummaryCalculated(sender As Object, e As TextFormatEventArgs) _ 
Handles lbUnitPriceTotal.SummaryCalculated

   If Not (e.Value Is Nothing) Then
      GrandTotals += Convert.ToDouble(e.Value)
   End If
End Sub

' Set the grand total value to the label's text.
Private Sub OnBeforePrint(sender As Object, e As PrintEventArgs) _ 
Handles lbUnitPriceGrandTotal.BeforePrint

   sender.Text = GrandTotals.ToString()
End Sub

Inheritance

Object

EventArgs

TextFormatEventArgs