XRControl.ExpressionBindings Property

Provides access to a control’s collection of expression bindings.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v19.1.dll

NuGet Packages: DevExpress.Reporting.Core, DevExpress.WindowsDesktop.Core

Declaration

C#

[Browsable(false)]
public virtual ExpressionBindingCollection ExpressionBindings { get; }

VB.NET

<Browsable(False)>
Public Overridable ReadOnly Property ExpressionBindings As ExpressionBindingCollection

Property Value

Type	Description
ExpressionBindingCollection	An ExpressionBindingCollection object.

Remarks

When the UserDesignerOptions.DataBindingMode property is set to DataBindingMode.Expressions or DataBindingMode.ExpressionsAdvanced, you can assign a binding expression to a report control:

• Use the ExpressionBinding.EventName property to specify the event handler in which the expression is evaluated.
• Use the ExpressionBinding.PropertyName property to specify the property to which the binding expression is applied.
• Use the ExpressionBinding.Expression to specify a binding expression for the specified property in the selected event handler.

See Data Binding Modes to learn more about using this feature.

The following code snippet demonstrates how to specify a custom expression for a label’s XRControl.Text property. This code assumes that a report is bound to a data source containing the UnitPrice and UnitsInStock fields.

C#

using DevExpress.XtraReports.UI;

public XtraReport1() {
    // ...
    ExpressionBinding expressionBinding = new ExpressionBinding("BeforePrint", "Text", "[UnitPrice]*[UnitsInStock]");
    xrLabel1.ExpressionBindings.Add(expressionBinding);
}

VB.NET

Imports DevExpress.XtraReports.UI

Public Sub New()
    ' ...
    Dim expressionBinding As New ExpressionBinding("BeforePrint", "Text", "[UnitPrice]*[UnitsInStock]")
    xrLabel1.ExpressionBindings.Add(expressionBinding)
End Sub