ExpressionBindingCollection Class

A collection of ExpressionBinding objects.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v21.2.dll

NuGet Package: DevExpress.Reporting.Core

Declaration

C#
VB.NET

public class ExpressionBindingCollection :
    ExpressionBindingCollectionBase<ExpressionBinding>

Public Class ExpressionBindingCollection
    Inherits ExpressionBindingCollectionBase(Of ExpressionBinding)

Remarks

An ExpressionBindingCollection object is returned by the XRControl.ExpressionBindings property.

You can create a binding expression to specify a control or parameter property. Create a ExpressionBinding object and set its properties:

EventName - the event handler that evaluates the expression. Set this property to BeforePrint or PrintOnPage. If you omit this property, the expression is evaluated in the BeforePrint event.
PropertyName - the property that the expression applies to.
Expression - the expression.

See Data Binding Modes for more information.

The following code example illustrates how to specify an expression to a control’s property:

C#
VB.NET

// Create a label control.
XRLabel label = new XRLabel();
// Specify an expression that sets the label's Text to the current date. The expression is rendered within the BeforePrint event.
XRLabel.ExpressionBindings.Add (new ExpressionBinding("Text", "TODAY()"));
// Specify an expression that is rendered within the PrintOnPage event.
XRLabel.ExpressionBindings.Add (new ExpressionBinding("PrintOnPage","Font.Bold","true"));

' Create a label control.
Dim label As New XRLabel()
' Specify an expression that sets the label's Text to the current date. The expression is rendered within the BeforePrint event.
XRLabel.ExpressionBindings.Add(New ExpressionBinding("Text", "TODAY()"))
' Specify an expression that is rendered within the PrintOnPage event.
XRLabel.ExpressionBindings.Add(New ExpressionBinding("PrintOnPage","Font.Bold","true"))