AlertControl.CustomizeHtmlTemplate Event

Allows you to dynamically customize elements of alert windows rendered from HTML-CSS templates.

Namespace: DevExpress.XtraBars.Alerter

Assembly: DevExpress.XtraBars.v23.2.dll

NuGet Package: DevExpress.Win.Navigation

Declaration

C#

[DXCategory("Events")]
public event CustomizeAlertHtmlTemplateEventHandler CustomizeHtmlTemplate

VB.NET

<DXCategory("Events")>
Public Event CustomizeHtmlTemplate As CustomizeAlertHtmlTemplateEventHandler

Event Data

The CustomizeHtmlTemplate event's data class is DevExpress.XtraBars.Alerter.CustomizeAlertHtmlTemplateEventArgs.

Remarks

AlertControl can render alert windows from HTML-CSS templates. Use the HtmlTemplate property to specify the template. You can also handle the AlertControl.BeforeFormShow event to assign templates to alert windows dynamically.

The CustomizeHtmlTemplate event fires before a template-based alert window is displayed.

Use the event’s RootInfo property to access individual HTML elements of the currently processed alert window. The following methods allow you to retrieve HTML elements by tag, class, and ID:

• RootInfo.FindElementsByTag — Returns a list of HTML elements that have the specified tag.
• RootInfo.FindElementsByClass — Returns a list of HTML elements that are of the specified class.
• RootInfo.FindElementById — Returns an HTML element with the specified ID.

The elements returned by these methods expose properties to change element display settings. The main properties include:

• element.Hidden — Allows you to hide the element.
• element.Style — Allows you to modify CSS style properties applied to the element. This object exposes the SetBackgroundColor, SetForeColor, and SetProperty methods for this purpose.

C#

private void alertControl1_CustomizeHtmlTemplate(object sender, DevExpress.XtraBars.Alerter.CustomizeAlertHtmlTemplateEventArgs e) {
    //...
    var photo = e.RootInfo.FindElementById("photo");
    if (photo != null) photo.Hidden = true;
}

VB.NET

Private Sub AlertControl1_CustomizeHtmlTemplate(sender As Object, e As CustomizeAlertHtmlTemplateEventArgs) Handles AlertControl1.CustomizeHtmlTemplate
    '...
    Dim photo = e.RootInfo.FindElementById("photo")
    If photo IsNot Nothing Then
        photo.Hidden = True
    End If
End Sub