bug修复

AIStudio.Wpf.DiagramDesigner/Models/Serializables/Container/ConstParameterItem.cs

@@ -0,0 +1,31 @@
+using AIStudio.Wpf.DiagramDesigner;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Serialization;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    [XmlInclude(typeof(ConstParameterItem))]
+    public class ConstParameterItem
+    {
+        [XmlAttribute]
+        public string Text { get; set; }
+
+        [XmlAttribute]
+        public virtual string Value { get; set; }     
+
+        public ConstParameterItem()
+        {
+
+        }
+
+        public ConstParameterItem(ConstParameter viewmodel) 
+        {
+            Text = viewmodel.Text;
+            Value = viewmodel.Value?.ToString();
+        }
+    }
+}