XRControl.BeforePrint Event

Occurs before an XRControl object creates its image in a report being generated.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v23.1.dll

NuGet Package: DevExpress.Reporting.Core

Declaration

C#

public virtual event BeforePrintEventHandler BeforePrint

VB.NET

Public Overridable Event BeforePrint As BeforePrintEventHandler

Event Data

The BeforePrint event's data class is CancelEventArgs. The following properties provide information specific to this event:

Property	Description
Cancel	Gets or sets a value indicating whether the event should be canceled.

Remarks

The BeforePrint event occurs when the report’s CreateDocument method is called (internally form other methods or explicitly).

You can handle this event to change the control’s properties. The event argument’s Cancel property allows you to cancel control rendering.

Note

This event does not have any relation to the actual printing process. To manage print settings, handle the PrintingSystemBase.StartPrint event instead.

The BeforePrint is not raised when you export the document to any available format because the export operation does not recreate the report document.

The BeforePrint event is raised with other events in the following order:

• BeforePrint
• XRControl.AfterPrint
• XRControl.PrintOnPage

See Report Events for more information.

Example

This example demonstrates how to handle a label’s XRControl.BeforePrint event, how to access an XRLabel object in this event handler, and how to customize its appearance based on a specific condition.

Tip

Online Example: How to change a label’s appearance in its BeforePrint event handler

C#

using System;
using System.ComponentModel;
using DevExpress.XtraReports.UI;
// ...

private void xrLabel_BeforePrint(object sender, CancelEventArgs e) {
    // Obtain the current label.
    XRLabel label = (XRLabel)sender;

    // Get the total value.
    double total = Convert.ToDouble(GetCurrentColumnValue("Total"));

    // Customize the label's appearance.
    if (total < 100) {
        label.ForeColor = Color.White;
        label.BackColor = Color.Red;
    }
    else if (total > 1000) {
        label.ForeColor = Color.White;
        label.BackColor = Color.Green;
    }
    else {
        label.ForeColor = Color.Black;
        label.BackColor = Color.Transparent;
    }
}

VB.NET

Imports System
Imports System.ComponentModel
Imports DevExpress.XtraReports.UI
' ...

Private Sub xrLabel_BeforePrint(ByVal sender As Object, ByVal e As CancelEventArgs)
    ' Obtain the current label.
    Dim label As XRLabel = DirectCast(sender, XRLabel)

    ' Get the total value.
    Dim total As Double = Convert.ToDouble(GetCurrentColumnValue("Total"))

    ' Customize the label's appearance.
    If total < 100 Then
        label.ForeColor = Color.White
        label.BackColor = Color.Red
    ElseIf total > 1000 Then
        label.ForeColor = Color.White
        label.BackColor = Color.Green
    Else
        label.ForeColor = Color.Black
        label.BackColor = Color.Transparent
    End If
End Sub