c#中子线程控制进度条的一个简单例子 2008-05-15 12:22

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这个问题来自社区提问,代码保留一份用来以后回答

using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace WindowsApplication4
...{
    
/**//// <summary>
    
/// gui 类
    
/// </summary>

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

        
private void button1_Click(object sender, EventArgs e)
        
...{
            
//用子线程工作
            new System.Threading.Thread(new System.Threading.ThreadStart(StartDownload)).Start();
        }

        
//开始下载
        public void StartDownload()
        
...{
            Downloader downloader 
= new Downloader();
            downloader.onDownLoadProgress 
+= new Downloader.dDownloadProgress(downloader_onDownLoadProgress);
            downloader.Start();
        }

        
//同步更新ui
        void downloader_onDownLoadProgress(long total, long current)
        
...{
            
if (this.InvokeRequired)
            
...{
                
this.Invoke(new Downloader.dDownloadProgress(downloader_onDownLoadProgress), new object[] ...{ total, current });
            }

            
else
            
...{
                
this.progressBar1.Maximum = (int)total;
                
this.progressBar1.Value = (int)current;
            }

        }

    }


    
/**//// <summary>
    
/// 下载类
    
/// </summary>

    public class Downloader
    
...{
        
//委托
        public delegate void dDownloadProgress(long total,long current);
        
//事件
        public event dDownloadProgress onDownLoadProgress;
        
//开始模拟工作
        public void Start()
        
...{
            
for (int i = 0; i < 100; i++)
            
...{
                
if (onDownLoadProgress != null)
                    onDownLoadProgress(
100, i);
                System.Threading.Thread.Sleep(
100);
            }

        }

    }

}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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