添加项目文件。

GroupLine.App/ModelDto/ComboBoxModel.cs

@@ -0,0 +1,30 @@
+using GalaSoft.MvvmLight;
+using System;
+
+namespace GroupLine.App.ModelDto
+{
+    public class ComboBoxModel : ObservableObject
+    {
+        private String key;
+        /// <summary>
+        /// Key值
+        /// </summary>
+        public String Key
+        {
+            get { return key; }
+            set { key = value; RaisePropertyChanged(() => Key); }
+        }
+
+
+        private String text;
+        /// <summary>
+        /// Text值
+        /// </summary>
+        public String Text
+        {
+            get { return text; }
+            set { text = value; RaisePropertyChanged(() => Text); }
+        }
+    }
+
+}