异步加载树节点

1. 1 using System;
2. 2 using System.Collections.Generic;
3. 3 using System.ComponentModel;
4. 4 using System.Data;
5. 5 using System.Drawing;
6. 6 using System.Text;
7. 7 using System.Threading;
8. 8 using System.Windows.Forms;
9. 9
10. 10 namespace FormCallBackTest
11. 11 {
12. 12 public partial class Form1 : Form
13. 13 {
14. 14 //声明委托已实现回调机制
15. 15 private delegate void CallBackTest();
16. 16 private CallBackTest callBackTest;
17. 17
18. 18 public delegate void DelegateDone();//界说一个委托
19. 19 public DelegateDone GetDelegateHandler; //声明委托
20. 20
21. 21 public Form1()
22. 22 {
23. 23 InitializeComponent();
24. 24
25. 25 //初始化回调
26. 26 GetDelegateHandler = new DelegateDone(ThdFunc); //绑定须要回调的函数
27. 27 }
28. 28 private void button1_Click(object sender, EventArgs e)
29. 29 {
30. 30 Thread th1 = new Thread(new ThreadStart(DoWork));//创建线程
31. 31 th1.IsBackground = true;//背景线程
32. 32 th1.Start();//启动线程
33. 33 }
34. 34
35. 35 private void ThdFunc()
36. 36 {
37. 37 List<string> listTest = new List<string>();
38. 38
39. 39 GetData(ref listTest);//获取数据
40. 40 InitTreeInfo(listTest);//构建立节点
41. 41 }
42. 42 private void GetData(ref List<string> listTest)
43. 43 {
44. 44 listTest.Clear();
45. 45 for (int i = 0; i < 1000000; i++)
46. 46 {
47. 47 listTest.Add("测试数据" + i);
48. 48 }
49. 49 }
50. 50 private void InitTreeInfo(List<string> listTest)
51. 51 {
52. 52 for (int i = 0; i < listTest.Count; i++)
53. 53 {
54. 54 TreeNode SubNode = new TreeNode();
55. 55 SubNode.Name = Convert.ToString(i + 1);
56. 56 SubNode.Text = listTest[i];
57. 57 this.Invoke((MethodInvoker)delegate()
58. 58 {
59. 59 treeView1.Nodes.Add(SubNode);
60. 60 });//防止跨线程
61. 61 }
62. 62 }
63. 63 void DoWork()
64. 64 {
65. 65 callBackTest = new CallBackTest(GetDelegateHandler);
66. 66 CallBack(callBackTest);
67. 67 }
68. 68 //使用委托
69. 69 private void CallBack(CallBackTest Delegate)
70. 70 {
71. 71 Delegate();
72. 72 }
73. 73
74. 74 }
75. 75 }<br /> 源码下载地点：https://files-cdn.cnblogs.com/files/yc1224/%E5%BC%82%E6%AD%A5%E5%8A%A0%E8%BD%BD%E6%A0%91%E8%8A%82%E7%82%B9.zip

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