ViewModelBase新增方法

huuhghhgyg · Sep 4, 2022 · 040f40d · 040f40d
1 parent 72b065d
commit 040f40d
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/Chamberlain_UWP/Backup/ViewModel/ViewModelBase.cs b/Chamberlain_UWP/Backup/ViewModel/ViewModelBase.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -15,5 +16,15 @@ protected virtual void OnPropertyChanged(string propertyName)
             PropertyChangedEventHandler handler = this. PropertyChanged;
             if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
         }
+        public bool Set<T>(ref T target, T value, [CallerMemberName] string propertyName = null)
+        {
+            //如果value无变化
+            if(EqualityComparer<T>.Default.Equals(target, value)) return false;
+
+            //目标值与value不同
+            target = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
     }
 }