WebWindow.ControlsCreating Event

Occurs before creating controls for the WebWindow‘s Web Forms page.

Namespace: DevExpress.ExpressApp.Web

Assembly: DevExpress.ExpressApp.Web.v18.2.dll

Declaration

C#

public event EventHandler ControlsCreating

VB.NET

Public Event ControlsCreating As EventHandler

Event Data

The ControlsCreating event's data class is EventArgs.

Remarks

The ControlsCreating event is raised as a result of executing the WebWindow.CreateControls method. Handle this event to access the Window’s page, before its controls are created. The page is accessible via the sender parameter.

C#

using System.Web.UI;
using DevExpress.ExpressApp.Web;
// ...
public class MyController : WindowController {
    protected override void OnActivated() {
        base.OnActivated();
        ((WebWindow)Window).ControlsCreating += ControlsCreating;
    }
    protected override void OnDeactivated() {
        ((WebWindow)Window).ControlsCreating -= ControlsCreating;
        base.OnDeactivated();
    }
    private void ControlsCreating(object sender, EventArgs e) {
        // Access the page via the sender parameter:
        string currentPageTheme = ((Page)sender).Theme;
        // ...
    }
}

VB.NET

Imports System.Web.UI
Imports DevExpress.ExpressApp.Web
'...
Public Class MyController
    Inherits WindowController
    Protected Overrides Sub OnActivated()
        MyBase.OnActivated()
        AddHandler (CType(Window, WebWindow)).ControlsCreating, AddressOf ControlsCreating
    End Sub
    Protected Overrides Sub OnDeactivated()
        RemoveHandler (CType(Window, WebWindow)).ControlsCreating, AddressOf ControlsCreating
        MyBase.OnDeactivated()
    End Sub
    Private Sub ControlsCreating(ByVal sender As Object, ByVal e As EventArgs)
        ' Access the page via the sender parameter:
        Dim currentPageTheme As String = (CType(sender, Page)).Theme
        ' ...
    End Sub
End Class