2 /// <summary>
3 /// 编辑Session
4 /// </summary>
5 public class EditSession {
6 private IWorkspaceEdit workspaceEdit;
7 private IWorkspace workspace;
8
9 /// <summary>
10 /// 设置编辑对象所在工作空间
11 /// </summary>
12 public IWorkspace Workspace {
13 get { return workspace; }
14 set {
15 workspace = value;
16 CheckValid();
17 workspaceEdit = workspace as IWorkspaceEdit;
18 }
19 }
20 /// <summary>
21 /// 开启编辑Session，并设置是否启用回退功能
22 /// </summary>
23 /// <param name="withUndoRedo"></param>
24 public void StartEdit(bool withUndoRedo) {
25 if (workspaceEdit.IsBeingEdited())
26 return;
27 workspaceEdit.StartEditing(withUndoRedo);
28 workspaceEdit.StartEditOperation();
29 workspaceEdit.EnableUndoRedo();
30 }
31 /// <summary>
32 /// 停止编辑Session，并设置是否保存编辑结果
33 /// </summary>
34 /// <param name="saveEdits"></param>
35 public void StopEdit(bool saveEdits) {
36 if (!workspaceEdit.IsBeingEdited())
37 return;
38 workspaceEdit.StopEditOperation();
39 workspaceEdit.StopEditing(saveEdits);
40 }
41 /// <summary>
42 /// 重做编辑
43 /// </summary>
44 public void Redo() {
45 bool hasRedos = false;
46 workspaceEdit.HasRedos(ref hasRedos);
47 if (hasRedos) {
48 workspaceEdit.RedoEditOperation();
49 }
50 }
51 /// <summary>
52 /// 撤销编辑
53 /// </summary>
54 public void Undo() {
55 bool hasUndos = false;
56 workspaceEdit.HasUndos(ref hasUndos);
57 if (hasUndos) {
58 workspaceEdit.UndoEditOperation();
59 }
60 }
61 /// <summary>
62 /// 验证数据是否合法
63 /// </summary>
64 private void CheckValid() {
65 if (workspace == null)
66 throw new ArgumentNullException();
67 }
68 }
转载于:https://www.cnblogs.com/xgyb12458/archive/2010/06/02/1749982.html