Use `AbpDaprEventData ` to pass `CorrelationId`.

framework/src/Volo.Abp.AspNetCore.Mvc.Dapr.EventBus/Volo/Abp/AspNetCore/Mvc/Dapr/EventBus/Controllers/AbpAspNetCoreMvcDaprEventsController.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
@@ -32,9 +33,19 @@ public class AbpAspNetCoreMvcDaprEventsController : AbpController
         }
 
         var distributedEventBus = HttpContext.RequestServices.GetRequiredService<DaprDistributedEventBus>();
-        var eventData = daprSerializer.Deserialize(data, distributedEventBus.GetEventType(topic));
+
-        string correlationId = null;
+        if (data.Contains("Data") && data.Contains("CorrelationId")) //TODO: Check the json with JSON Schema.
-        await distributedEventBus.TriggerHandlersAsync(id, distributedEventBus.GetEventType(topic), eventData, correlationId);
+        {
+            var abpDaprEventData = daprSerializer.Deserialize(data, typeof(AbpDaprEventData<>).MakeGenericType(distributedEventBus.GetEventType(topic)));
+            var eventData = abpDaprEventData.GetType().GetProperties().First(x => x.Name == "Data").GetValue(abpDaprEventData);
+            var correlationId = abpDaprEventData.GetType().GetProperties().First(x => x.Name == "CorrelationId").GetValue(abpDaprEventData) as string;
+            await distributedEventBus.TriggerHandlersAsync(id, distributedEventBus.GetEventType(topic), eventData, correlationId);
+        }
+        else
+        {
+            var eventData = daprSerializer.Deserialize(data, distributedEventBus.GetEventType(topic));
+            await distributedEventBus.TriggerHandlersAsync(id, distributedEventBus.GetEventType(topic), eventData, null);
+        }
         return Ok();
     }
 }

framework/src/Volo.Abp.EventBus.Dapr/Volo/Abp/EventBus/Dapr/AbpDaprEventData.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Reflection;
+
+namespace Volo.Abp.EventBus.Dapr;
+
+public class AbpDaprEventData<TData>
+{
+    public TData Data { get; set; }
+
+    public string CorrelationId { get; set; }
+
+    public AbpDaprEventData(TData data, string correlationId)
+    {
+        Data = data;
+        CorrelationId = correlationId;
+    }
+
+    public static object Create(object data, string correlationId)
+    {
+        return Activator.CreateInstance(
+            typeof(AbpDaprEventData<>).MakeGenericType(data.GetType()),
+            BindingFlags.Instance | BindingFlags.Public,
+            binder: null,
+            new object[] { data, correlationId },
+            culture: null)!;
+    }
+}

framework/src/Volo.Abp.EventBus.Dapr/Volo/Abp/EventBus/Dapr/DaprDistributedEventBus.cs

@@ -256,7 +256,8 @@ public class DaprDistributedEventBus : DistributedEventBusBase, ISingletonDepend
     protected virtual async Task PublishToDaprAsync(string eventName, object eventData, string correlationId)
     {
         var client = DaprClientFactory.Create();
-        await client.PublishEventAsync(pubsubName: DaprEventBusOptions.PubSubName, topicName: eventName, data: eventData);
+        var data = AbpDaprEventData<object>.Create(eventData, correlationId);
+        await client.PublishEventAsync(pubsubName: DaprEventBusOptions.PubSubName, topicName: eventName, data: data);
     }
 
     private static bool ShouldTriggerEventForHandler(Type targetEventType, Type handlerEventType)