isError in RecordCollection is alway false

WSDDBBrower/WSDDBBrower/Core/RecordCollection.cs

@@ -104,7 +104,20 @@ namespace WSDDBBrowser.Core
         /// <summary>
         /// 超过限制了
         /// </summary>
-        public bool IsError { get; set; }
+        public bool IsError
+        {
+            get {
+                if (Average > ToleranceMax)
+                    return true;
+                else if (Average < ToleranceMin)
+                {
+                    return true;
+                }
+                else {
+                    return false;
+                }
+            }
+        }
 
         public object Mapper { get; private set; }
         public Func<double, string> XFormatter { get; set; }

WSDDBBrower/WSDDBBrower/PgMonitorChartConfig.xaml.cs

@@ -105,7 +105,7 @@ namespace WSDDBBrowser
             };
 
             RecordCollections = new List<RecordCollection>() {
-                new RecordCollection(){ DeviceID = "101", DeviceName = "温度1", Target=100, Tolerance=2, Average = 100.1, Min=99, Max = 101, Sigma3 = 1, IsError = false }
+                new RecordCollection(){ DeviceID = "101", DeviceName = "温度1", Target=100, Tolerance=2, Average = 100.1, Min=99, Max = 101, Sigma3 = 1 }
             };
         }
     }