添加了@Dtc（数据类型转换）、@Data（获取全局数据）表达式

Workbench/Node/ViewModel/ExpOpNodeControlViewModel.cs

@@ -0,0 +1,26 @@
+using Serein.NodeFlow.Model;
+using Serein.Workbench.Node.View;
+
+namespace Serein.Workbench.Node.ViewModel
+{
+    public class ExpOpNodeControlViewModel: NodeControlViewModelBase
+    {
+        public  new SingleExpOpNode NodeModel { get; }
+
+        //public string Expression
+        //{
+        //    get => node.Expression;
+        //    set
+        //    {
+        //        node.Expression = value;
+        //        OnPropertyChanged();
+        //    }
+        //}
+
+
+        public ExpOpNodeControlViewModel(SingleExpOpNode nodeModel) : base(nodeModel)
+        { 
+            this.NodeModel = nodeModel;
+        }
+    }
+}

Workbench/Node/ViewModel/GlobalDataNodeControlViewModel.cs

@@ -0,0 +1,18 @@
+using Serein.NodeFlow.Model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Node.ViewModel
+{
+    public class GlobalDataNodeControlViewModel : NodeControlViewModelBase
+    {
+        public new SingleGlobalDataNode NodelModel { get; }
+        public GlobalDataNodeControlViewModel(SingleGlobalDataNode node) : base(node)
+        {
+            this.NodelModel = node;
+        }
+    }
+}