异步加载树节点

显示全部楼层 · 2019-12-26 09:06:18

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

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