添加项目文件。

Test.DotNet.RevitUI (2016)/ViewModel/RibbonViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using DotNet.RevitUI;
+using DotNet.RevitUI.MVVM;
+using Test.DotNet.RevitUI.Command;
+
+namespace Test.DotNet.RevitUI.ViewModel
+{
+    public class RibbonViewModel : ObservableObject
+    {
+        /// <summary>
+        /// 删除元素 测试
+        /// </summary>
+
+        public RevitCommand DeleteElement { get; set; }
+
+        /// <summary>
+        /// 删除匹配元素 测试
+        /// </summary>
+        public RevitCommand DeleteMatchElement { get; set; }
+
+        /// <summary>
+        /// This is command test 
+        /// </summary>
+        public RevitCommand SplitButton1 { get; set; }
+
+        /// <summary>
+        /// This is command test 
+        /// </summary>
+        public RevitCommand SplitButton2 { get; set; }
+
+        /// <summary>
+        /// This is command test 
+        /// </summary>
+        public RevitCommand FlowButton1 { get; set; }
+
+        /// <summary>
+        /// This is command test 
+        /// </summary>
+        public RevitCommand FlowButton2 { get; set; }
+
+
+        public RibbonViewModel()
+        {
+            this.DeleteElement = new DeleteElementCommand();
+
+            this.DeleteMatchElement = new DeleteMatchElementCommand();
+
+            this.SplitButton1 = new SplitButton1Command();
+
+            this.SplitButton2 = new SplitButton1Command();
+
+            this.FlowButton1 = new FlowButton1Command();
+
+            this.FlowButton2 = new FlowButton1Command();
+        }
+    }
+}