AlertControl.ButtonClick Event

Fires when a custom button within an alert window has been clicked.

Namespace: DevExpress.XtraBars.Alerter

Assembly: DevExpress.XtraBars.v18.2.dll

Declaration

C#

[DXCategory("Events")]
public event AlertButtonClickEventHandler ButtonClick

VB.NET

<DXCategory("Events")>
Public Event ButtonClick As AlertButtonClickEventHandler

Event Data

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

Property	Description
ActivateOwner	Gets or sets whether the owner (a form) of the current alert window is activated after executing your AlertControl.AlertClick event handler. Inherited from AlertClickEventArgs.
AlertForm	Gets the currently processed alert window. Inherited from AlertClickEventArgs.
Button	Provides access to the settings of the button that has been clicked.
ButtonName	Gets the name of the button that has been clicked.
Info	Gets an object that contains information displayed in the currently processed alert window. Inherited from AlertClickEventArgs.

Remarks

Use the ButtonClick event to respond to clicking custom regular buttons within alert windows. To respond to clicking custom check buttons, handle the AlertControl.ButtonDownChanged event instead. Custom regular and check buttons are stored in the AlertControl.Buttons collection.

To identify the button that has been clicked, use the event’s AlertButtonClickEventArgs.ButtonName parameter.

When displaying an alert window, it’s possible to associate custom data with this window and then use this data while handling the AlertControl.ButtonClick or AlertControl.ButtonDownChanged event. To provide data, you can do following:

• pass the data as the tag parameter of the AlertControl.Show method;
• if you call the AlertControl.Show method with an AlertInfo parameter, set the custom data to the AlertInfo.Tag property.

To access the custom data while handling the AlertControl.ButtonClick and AlertControl.ButtonDownChanged events, use the event’s Info.Tag parameter.

Example

The following example shows how to add custom buttons to an AlertControl.

It’s assumed that an AlertControl control has been added to the form at design time. In the example, two custom buttons are added to the control’s AlertControl.Buttons collection. The first button is a regular button, which when clicked, produces the AlertControl.ButtonClick event. The second button has checked and unchecked states. Clicking this button fires the AlertControl.ButtonDownChanged event.

The result is shown below:

C#

using DevExpress.XtraBars.Alerter;

// Create a regular custom button.
AlertButton btn1 = new AlertButton(Image.FromFile(@"c:\folder-16x16.png"));
btn1.Hint = "Open file";
btn1.Name = "buttonOpen";
// Create a check custom button.
AlertButton btn2 = new AlertButton(Image.FromFile(@"c:\clock-16x16.png"));
btn2.Style = AlertButtonStyle.CheckButton;
btn2.Down = true;
btn2.Hint = "Alert On";
btn2.Name = "buttonAlert";
// Add buttons to the AlertControl and subscribe to the events to process button clicks
alertControl1.Buttons.Add(btn1);
alertControl1.Buttons.Add(btn2);
alertControl1.ButtonClick += new AlertButtonClickEventHandler(alertControl1_ButtonClick);
alertControl1.ButtonDownChanged += 
    new AlertButtonDownChangedEventHandler(alertControl1_ButtonDownChanged);

// Show a sample alert window.
AlertInfo info = new AlertInfo("New Window", "Text");
alertControl1.Show(this, info);

void alertControl1_ButtonDownChanged(object sender, 
AlertButtonDownChangedEventArgs e) {
    if (e.ButtonName == "buttonOpen") {
        //...
    }
}

void alertControl1_ButtonClick(object sender, AlertButtonClickEventArgs e) {
    if (e.ButtonName == "buttonAlert") {
        //...
    }
}

VB.NET

Imports DevExpress.XtraBars.Alerter

' Create a regular custom button.
Dim btn1 As AlertButton = New AlertButton(Image.FromFile("c:\folder-16x16.png"))
btn1.Hint = "Open file"
btn1.Name = "buttonOpen"
' Create a check custom button.
Dim btn2 As AlertButton = New AlertButton(Image.FromFile("c:\clock-16x16.png"))
btn2.Style = AlertButtonStyle.CheckButton
btn2.Down = True
btn2.Hint = "Alert On"
btn2.Name = "buttonAlert"
' Add buttons to the AlertControl and subscribe to the events to process button clicks
alertControl1.Buttons.Add(btn1)
alertControl1.Buttons.Add(btn2)
AddHandler alertControl1.ButtonClick, AddressOf alertControl1_ButtonClick
AddHandler alertControl1.ButtonDownChanged, _ 
AddressOf alertControl1_ButtonDownChanged

' Show a sample alert window.
Dim info As AlertInfo = New AlertInfo("New Window", "Text")
alertControl1.Show(Me, info)

Private Sub alertControl1_ButtonDownChanged(ByVal sender As Object, _ 
ByVal e As AlertButtonDownChangedEventArgs)
    If e.ButtonName = "buttonOpen" Then
        '...
    End If
End Sub

Private Sub alertControl1_ButtonClick(ByVal sender As Object, _ 
ByVal e As AlertButtonClickEventArgs)
    If e.ButtonName = "buttonAlert" Then
        '...
    End If
End Sub