重新优化了NodeModel类；从硬编码类型改为“注册/获取”的方式，为下一步解耦Workbench与节点UI做准备。

新增了“全局数据节点”；保存项目文件时，不同节点可以使用自定义数据保存自身独特的数据，不再借用“方法参数”。
重新设计了运行时的环境输出；增量式生成器现在可以选择在属性变更的前后时间点插入自定义代码；重写了加载项目、保存项目的方法。

NodeFlow/Model/SingleGlobalDataNode.cs

@@ -1,30 +1,140 @@
-using Serein.Library;
+using Newtonsoft.Json.Linq;
+using Serein.Library;
 using Serein.Library.Api;
+using Serein.Library.Utils;
 using System;
 using System.Collections.Generic;
+using System.Dynamic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace Serein.NodeFlow.Model
 {
+
+    
+        /// <summary>
+    /// Expression Operation - 表达式操作
+    /// </summary>
+    [NodeProperty(ValuePath = NodeValuePath.Node)]
+    public partial class SingleGlobalDataNode : NodeModelBase
+    {
+        /// <summary>
+        /// 表达式
+        /// </summary>
+        [PropertyInfo(IsNotification = true, CustomCodeAtStart = "ChangeName(value);")] 
+        private string _keyName;
+
+    }
+     
     /// <summary>
     /// 全局数据节点
     /// </summary>
-    public class SingleGlobalDataNode : NodeModelBase
+    public partial class SingleGlobalDataNode : NodeModelBase
     {
         public SingleGlobalDataNode(IFlowEnvironment environment) : base(environment)
         {
         }
 
-        public override ParameterData[] GetParameterdatas()
+        /// <summary>
+        /// 数据节点
+        /// </summary>
+        private string? DataNodeGuid;
+
+        /// <summary>
+        /// 设置数据节点
+        /// </summary>
+        /// <param name="dataNode"></param>
+        public void SetDataNode(NodeModelBase dataNode)
         {
-            throw new NotImplementedException();
+            DataNodeGuid = dataNode.Guid;
         }
 
-        public override void OnCreating()
+        private void ChangeName(string newName)
         {
-            throw new NotImplementedException();
+            if(SereinEnv.GetFlowGlobalData(_keyName) == null)
+            {
+                return;
+            }
+            SereinEnv.ChangeNameFlowGlobalData(_keyName, newName);
         }
+
+        /// <summary>
+        /// 设置全局数据
+        /// </summary>
+        /// <param name="context"></param>
+        /// <returns></returns>
+        public override async Task<object> ExecutingAsync(IDynamicContext context)
+        {
+            if (string.IsNullOrEmpty(KeyName))
+            {
+                context.NextOrientation = ConnectionInvokeType.IsError;
+                SereinEnv.WriteLine(InfoType.ERROR, $"全局数据的KeyName不能为空[{this.Guid}]");
+                return null;
+            }
+            if (DataNodeGuid == null)
+            {
+                context.NextOrientation = ConnectionInvokeType.IsError;
+                SereinEnv.WriteLine(InfoType.ERROR, $"全局数据节点没有数据[{this.Guid}]");
+                return null;
+            }
+
+            try
+            {
+                var result = await context.Env.InvokeNodeAsync(context, DataNodeGuid);
+                SereinEnv.AddOrUpdateFlowGlobalData(KeyName, result);
+                return result;
+            }
+            catch (Exception ex)
+            {
+                context.NextOrientation = ConnectionInvokeType.IsError;
+                context.ExceptionOfRuning = ex;
+                return null;
+            }
+        }
+        
+        /// <summary>
+        /// 保存全局变量的数据
+        /// </summary>
+        /// <param name="nodeInfo"></param>
+        /// <returns></returns>
+        public override NodeInfo SaveCustomData(NodeInfo nodeInfo)
+        {
+            dynamic data = new ExpandoObject();
+            nodeInfo.CustomData = data;
+
+            data.KeyName = KeyName; // 变量名称
+
+            if (string.IsNullOrEmpty(DataNodeGuid))
+            {
+                return nodeInfo;
+            }
+            
+            data.DataNodeGuid = DataNodeGuid; // 数据节点Guid
+            
+            nodeInfo.ChildNodeGuids = [DataNodeGuid];
+            return nodeInfo;
+        }
+
+        /// <summary>
+        /// 加载全局变量的数据
+        /// </summary>
+        /// <param name="nodeInfo"></param>
+        public override void LoadCustomData(NodeInfo nodeInfo)
+        {
+            KeyName = nodeInfo.CustomData?.KeyName;
+            DataNodeGuid = nodeInfo.CustomData?.DataNodeGuid;
+        }
+
+        /// <summary>
+        /// 需要移除数据节点
+        /// </summary>
+        public override void Remove()
+        {
+            // 移除数据节点
+            _ = this.Env.RemoveNodeAsync(DataNodeGuid);
+        }
+
     }
 }