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最近我在做一個項目,遇到了跨線程要去訪問頁面控件.但是總是提示出錯,不能在其它線程中修改創(chuàng)建控件的線程的控件的值,后來采用了匿名代理,結果很輕松地解決了.解決過程如下:
首先在窗體上,創(chuàng)建一個listbox,lable.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace AccessControl
{
    public partial class Form1 : Form
    {     
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {  
            Thread newthread = new Thread(new ThreadStart(BackgroundProcess));
            newthread.Start();         

        }

        /// <summary>
        /// 定義一個代理
        /// </summary>
        private delegate void CrossThreadOperationControl();

        private void BackgroundProcess()
        {
            // 將代理實例化為一個匿名代理
            CrossThreadOperationControl CrossDelete = delegate()         
            {           
                int i = 1;
                while (i<5)
                {
                   // 向列表框增加一個項目
                    listBox1.Items.Add("Item " + i.ToString());                   
                    i++;
                }
                label1.Text = "我在新線程里訪問這個lable!";
                listBox1.Items.Add(label1.Text);
            }  ;
            listBox1.Invoke(CrossDelete);           
        }