LIN 值更新和LIN接受优化数据

CapMachine.Wpf/LinDrive/LinLdfModel.cs

@@ -1,4 +1,4 @@
-using Prism.Mvvm;
+using Prism.Mvvm;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -62,7 +62,7 @@ namespace CapMachine.Wpf.LinDrive
             }
         }
 
-        private StringBuilder _SignalRtValueSb = new StringBuilder(10);
+        private StringBuilder _SignalRtValueSb = new StringBuilder(16);
         /// <summary>
         /// 信号实时值 StringBuilder
         /// </summary>
@@ -71,12 +71,24 @@ namespace CapMachine.Wpf.LinDrive
             get { return _SignalRtValueSb; }
             set
             {
-                //if (_SignalRtValueSb != value)
-                //{
-                SignalRtValue = value.ToString();
-                _SignalRtValueSb = value;
-                //}
+                if (value == null)
+                {
+                    if (_SignalRtValue != string.Empty)
+                    {
+                        _SignalRtValueSb.Clear();
+                        SignalRtValue = string.Empty;
+                    }
+                    return;
+                }
 
+                // 复制内容到内部可变缓冲区，避免多个模型共享同一个 StringBuilder 实例
+                var str = value.ToString();
+                if (!string.Equals(_SignalRtValue, str, StringComparison.Ordinal))
+                {
+                    _SignalRtValueSb.Clear();
+                    _SignalRtValueSb.Append(str);
+                    SignalRtValue = str;
+                }
             }
         }