添加项目文件。

VisionFrame.Base/Converter/NodeJsonConverter.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+
+namespace VisionFrame.Base.Converter
+{
+    public class NodeJsonConverter : JsonConverter<NodeModelBase>
+    {
+        class TypeInfoTemp
+        {
+            public string TypeInfo { get; set; }
+        }
+        // 字符串到对象实例的转换过程
+        public override NodeModelBase? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            string json = reader.GetString();// 包含程序信息
+
+            TypeInfoTemp ti = System.Text.Json.JsonSerializer.Deserialize<TypeInfoTemp>(json);
+            string[] type_info = ti.TypeInfo.Split(";");
+            Assembly assembly = Assembly.GetEntryAssembly();// 取当前执行的程序集
+            if (assembly.GetName().Name != type_info[0])
+            {
+                assembly = Assembly.LoadFile(Environment.CurrentDirectory + "/Activities/" + type_info[0] + ".dll");
+            }
+            // 最终要执的节点Model
+            Type type = assembly.GetType(type_info[1]);
+
+            NodeModelBase node = (NodeModelBase)System.Text.Json.JsonSerializer.Deserialize(json, type);
+            return node;
+        }
+
+        // 对象到Json字符串的转换过程
+        public override void Write(Utf8JsonWriter writer, NodeModelBase value, JsonSerializerOptions options)
+        {
+            // value--->Json
+            // writer--写
+            // 准备类型的记录
+            string type = value.GetType().FullName;
+            string assembly = value.GetType().Assembly.GetName().Name;
+            value.TypeInfo = assembly + ";" + type;
+
+            // 如果直接放value  会循环触发这个方法
+            // 用一个动态变量接收，
+            dynamic temp = value;
+            string json = System.Text.Json.JsonSerializer.Serialize(temp);
+            writer.WriteStringValue(json);
+        }
+    }
+}