AIChatControl.MessageSending Event

Fires when a user submits a message to the chat.

Namespace: DevExpress.AIIntegration.Wpf.Chat

Assembly: DevExpress.AIIntegration.Wpf.Chat.v26.1.dll

NuGet Package: DevExpress.AIIntegration.Wpf.Chat

Declaration

C#

public event EventHandler<AIChatControlMessageSendingEventArgs> MessageSending

VB.NET

Public Event MessageSending As EventHandler(Of AIChatControlMessageSendingEventArgs)

Event Data

The MessageSending event's data class is DevExpress.AIIntegration.Blazor.Chat.WebView.AIChatControlMessageSendingEventArgs.

Remarks

To manually process messages sent to an AI service, handle the MessageSending event. For example, you can manually call the AI client or service of choice, and return its responses to the chat. The following example adds responses to user questions:

XAML

<dxaichat:AIChatControl x:Name="aiChatControl"
                MessageSending="AiChatControl_MessageSending"
                HorizontalAlignment="Stretch" 
                VerticalAlignment="Stretch" 
                Margin="10">
</dxaichat:AIChatControl>

C#

async void AiChatControl_MessageSending(object sender, AIChatControlMessageSendingEventArgs e) {
    e.Cancel = true; 
    await e.Chat.SendMessageAsync($"Processed: {e.Content}", ChatRole.User);
}

Note

Set the e.Cancel event parameter to true to block automatic message delivery and use the AIChatControl.SendMessageAsync method to send the message to the AI service manually.

Refer to the following help topic for additional information: AI Chat Control