进度条用线程处理怎么还是不好用啊?
老大们,我郁闷了,救救我啊.

using   System.Threading;
private   Boolean   bTasking   =   false;
private   Thread   tr_Task;


public   void   UF_Task(Boolean   bstart)
{
bTasking   =   bstart;
if   (bstart)   sBarP2.Value   =   0;
if   (tr_Task   ==   null)
{
tr_Task   =   new   Thread(new   ThreadStart(UF_DoProcess));
tr_Task.IsBackground   =   true;
tr_Task.Name   =   "QBSProcess ";
tr_Task.Start();
}
if   (!bstart)   sBarP2.Value   =   100;
}

private   void   UF_DoProcess()
{
try
{
MethodInvoker   mip   =   new   MethodInvoker(this.UF_ProcStep);
while   (bTasking)
{
this.BeginInvoke(mip);
Thread.Sleep(100);
}
}
catch   {   }
}

private   void   UF_ProcStep()
{
if   (!bTasking)   return;
if   (sBarP2.Value   ==   100)   sBarP2.Value   =   0;
else   sBarP2.PerformStep();
}


假设我在调用一个任务A时   ,大约需要1秒,调用

UF_Task(true);
A任务;
UF_Task(false);

可是进度条没有中间状态啊,进度条只有0和100....
怎么回事啊???
在线等,老大门!!!!




------解决方案--------------------
用timer不好么。。。
------解决方案--------------------
只有UI线程才能操作UI控件,将对进度条value副值的操作交给UI线程来做

------解决方案--------------------
可是进度条没有中间状态啊,进度条只有0和100....
怎么回事啊???

－－－－－－－－－－－－－－－－－－－－－－－

你没有在public void UF_Task(Boolean bstart)方法中去变更sBarP2.Value ，当然不会有进度条滚动的效果了。先不说你没有进度条渐进的过程，你的程序现在连进度条从0到100的过程都没有，根本不会变化。
------解决方案--------------------
如果是.net 2.0可以使用BackgroundWorker类，它可以用于与UI线程交互
下面是一段代码，可以参考一下。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace BackGroundThread
{
public partial class Form1 : Form
{
private BackgroundWorker workThread;
public Form1()
{
InitializeComponent();
workThread = new BackgroundWorker();
workThread.WorkerReportsProgress = true;
workThread.WorkerSupportsCancellation = true;

workThread.DoWork += new DoWorkEventHandler(workThread_DoWork);
workThread.ProgressChanged += new ProgressChangedEventHandler(workThread_ProgressChanged);
workThread.RunWorkerCompleted += new RunWorkerCompletedEventHandler(workThread_RunWorkerCompleted);

this.FormClosed += new FormClosedEventHandler(Form1_FormClosed);
}

void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
workThread.Dispose();
}

void workThread_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
MessageBox.Show(e.Error.Message);
}
else if (e.Cancelled)
{
// Next, handle the case where the user canceled
// the operation.
// Note that due to a race condition in
// the DoWork event handler, the Cancelled