C#进度条

http://hi.baidu.com/zzh_my/blog/item/701bb61f1a03d703314e156d.html

进度条是一个软件人性化考虑之一，他给用户的感觉就是程序内部在不停的动作，执行到了什么程度，而不是整个界面僵死，以至于用户不知道程序在做什么！

　　看了好几个WinForm程序了，发现他们对进度条的处理完全失去了进度条的作用。他们都是采用Timer来处理，在线程结束的时候，直接赋值进度条达到100%。和我以前做WebForm程序的时候完全不一样，做WebForm程序的时候，进度条是根据总体数据和每步执行后而计算和更新的。在看了这几个WinForm程序后，我在想：是否所有WinForm程序，在进度条的处理上都不能保证实时进度显示？

　　其实用Timer来处理，不停的更新进度条只是程序作者偷懒的方法。当然这样的好处就是可以简单化处理进度条，代码量少，不易出错，调试方便。

　　还有一种方法，就是可以及时更新进度条的数据的。那就是采用事件驱动机制，在子线程中监视复杂处理过程中的设定的事件，及时更新！直接看代码：
程序代码using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace WindowsApplication1
{
     /// <summary>
     /// Form1 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（您的复杂处理类）
     /// </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);
             }
         }
     }
}=================================ling========================================
delegate object dlExecuteQuery();
private void button1_Click(object sender, EventArgs e)
{
dlExecuteQuery de=new dlExecuteQuery(this.Query());
IAsyncResult ir = de.BeginInvoke(null, null);

Form f=new Form()
f.ShowDialog(this);
Application.DoEvents();
while (!ir.IsCompleted)
{
Application.DoEvents();
}
object obj = de.EndInvoke(ir);
f.Close();
}

private object Query()
{
//长时间的操作
}

_______________________________________________________________________________________________________________________________________

private void btnCount_Click(object sender, EventArgs e)
{
label1.Visible=true;
progressBar.Visible = true;
progressBar.Minimum = 0;
progressBar.Maximum = ds.Tables["表"].Rows.Count;
progressBar.BackColor = Color.Green;
for (int i = 0; i < ds.Tables["表"].Rows.Count; i++)
{
progressBar.Value++;
Application.DoEvents();
this.label1.Text = Convert.ToString(progressBar.Value);
}
}

或者

private void btnCount_Click(object sender, EventArgs e)
        {
            label1.Visible=true;
            progressBar.Visible = true;
            progressBar.Minimum = 0;
            progressBar.Maximum = ds.Tables["表"].Rows.Count;
            progressBar.BackColor = Color.Green;
            for (int i = 0; i  < ds.Tables["表"].Rows.Count; i++)
            {
               progressBar.Value++;
               Application.DoEvents();
                this.label1.Text = Convert.ToString(progressBar.Value);this.label1.Refresh();
            }

        }
http://blog.163.com/light_warm/blog/static/3168104200861710226745/





另：



 建立一个listBox将进程名称遍历进去

this.listBox1.Items.Clear();
Process[] MyProcesses=Process.GetProcesses();
foreach(Process MyProcess in MyProcesses)
{
this.listBox1.Items.Add(MyProcess.ProcessName);
}
this.listBox1.SelectedIndex=0;
 
 选中listBox里面的项后将进程详细信息显示在右面的Label中
try
{
string ProcessName=this.listBox1.Text;
this.groupBox1.Text=ProcessName+"进程的详细信息";
Process[] MyProcess=Process.GetProcessesByName(ProcessName);
this.label1.Text="进程影象名："+MyProcess[0].ProcessName;
this.label2.Text="进程ID："+MyProcess[0].Id;
this.label3.Text="启动线程树："+MyProcess[0].Threads.Count.ToString();
this.label4.Text="CPU占用时间："+MyProcess[0].TotalProcessorTime.ToString();
this.label5.Text="线程优先级："+MyProcess[0].PriorityClass.ToString();
this.label6.Text="启动时间："+MyProcess[0].StartTime.ToLongTimeString();
this.label7.Text="专用内存："+(MyProcess[0].PrivateMemorySize/1024).ToString()+"K";
this.label8.Text="峰值虚拟内存："+(MyProcess[0].PeakVirtualMemorySize/1024).ToString()+"K";
this.label9.Text="峰值分页内存："+(MyProcess[0].PeakPagedMemorySize/1024).ToString()+"K";
this.label10.Text="分页系统内存："+(MyProcess[0].PagedSystemMemorySize/1024).ToString()+"K";
this.label11.Text="分页内存："+(MyProcess[0].PagedMemorySize/1024).ToString()+"K";
this.label12.Text="未分页系统内存："+(MyProcess[0].NonpagedSystemMemorySize/1024).ToString()+"K";
this.label13.Text="物理内存："+(MyProcess[0].WorkingSet/1024).ToString()+"K";
this.label14.Text="虚拟内存："+(MyProcess[0].VirtualMemorySize/1024).ToString()+"K";
}
catch(Exception Err)
{
MessageBox.Show("没有此进程，无法获取信息！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
//不处理异常
            }