添加项目文件。

SamplePre.Models/Ext/config_role_ext.cs

@@ -0,0 +1,16 @@
+using SamplePre.Models.Tables;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SamplePre.Models.Ext
+{
+    public class config_role_ext : config_role
+    {
+
+        public bool IsSelected { get; set; }
+
+    }
+}