fixed a bug of demo

src/Shared/HandyControlDemo_Shared/Service/Data/DataService.cs

@@ -69,7 +69,7 @@ namespace HandyControlDemo.Service
                     Index = i,
                     IsSelected = i % 2 == 0,
                     Name = $"Name{i}",
-                    Type = (DemoType) i,
+                    Type = (DemoType) (i % 6 + 1),
                     DataList = dataList,
                     ImgPath = $"/HandyControlDemo;component/Resources/Img/Avatar/avatar{i % 6 + 1}.png",
                     Remark = new string(i.ToString()[0], 10)

src/Shared/HandyControl_Shared/Data/Enum/EnumDataProvider.cs

@@ -10,7 +10,6 @@ namespace HandyControl.Data
         public EnumDataProvider()
         {
             MethodName = nameof(GetValues);
-            ObjectType = typeof(System.Enum);
         }
 
         private Type _type;
@@ -21,6 +20,7 @@ namespace HandyControl.Data
             {
                 _type = value;
                 MethodParameters.Add(value);
+                ObjectType = typeof(System.Enum);
             }
         }