Default RichContent

Author: Yanan Wang

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs

@@ -1,4 +1,5 @@
 using BotSharp.Abstraction.Agents.Models;
+using BotSharp.Abstraction.Messaging.Models.RichContent;
 using BotSharp.Abstraction.Routing;
 using BotSharp.Abstraction.Routing.Settings;
 using System.Drawing;
@@ -100,6 +101,15 @@ private async Task HandleAssistantMessage(RoleDialogModel message, Func<RoleDial
         _logger.LogInformation(text);
 #endif
 
+        // Only read content from RichContent for UI rendering. When richContent is null, create a basic text message for richContent.
+        var state = _services.GetRequiredService<IConversationStateService>();
+        message.RichContent = message.RichContent ?? new RichContent<TextMessage>
+        {
+            Recipient = new Recipient { Id = state.GetConversationId() },
+            MessageingType = "RESPONSE",
+            Message = new TextMessage { Text = message.Content }
+        };
+
         var hooks = _services.GetServices<IConversationHook>().ToList();
         foreach (var hook in hooks)
         {