关于网友提出的“progressbar c# progressBar使用”问题疑问，本网通过在网上对“progressbar c# progressBar使用”有关的相关答案进行了整理，供用户进行参考，详细问题解答如下：
问题：progressbar c# progressBar使用
描述: 我要上传一个大文件，由于时间很长，不知道什么时候结束。C#中怎么样使用progressBar能够知道现在上传文件的进度呢？
解决方案1: 前几天刚用过,修改了一下,参考了一位前辈的例子
http://blog.mylover.cn/2009/02/post-3.html
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 TestProgressBar
{
public partial class TestForm : Form
{
//线程开始的时候调用的委托
private delegate void maxValueDelegate(WordEventArgs e);
//线程执行中调用的委托
private delegate void nowValueDelegate(WordEventArgs e);
//线程执行结束调用的委托
private delegate void endValueDelegate(WordEventArgs e);
public TestForm()
{
InitializeComponent();
}
private void btn_Test_Click(object sender, EventArgs e)
{
Worker worker = new Worker();
/// 订阅事件
worker.OnStartWorkEvent += new WorkEventHandler(this.OnStartWorkEventHandler);
worker.OnDoWorkEvent += new WorkEventHandler(this.OnDoWorkEventHandler);
worker.OnEndWorkEvent += new WorkEventHandler(this.OnEndWorkEventHandler);
Thread thread = new Thread(new ThreadStart(worker.Work));
thread.Start();
}
///
/// 线程开始事件,设置进度条最大值,需要一个委托来替我完成
///
///
///
void OnStartWorkEventHandler(object sender, WordEventArgs e)
{
maxValueDelegate max = new maxValueDelegate(SetMaxValue);
this.Invoke(max, e);
}
///
/// 线程执行中的事件,设置进度条当前进度,需要一个委托来替我完成
///
///
///
void OnDoWorkEventHandler(object sender, WordEventArgs e)
{
nowValueDelegate now = new nowValueDelegate(SetNowValue);
this.Invoke(now, e);
}
///
/// 线程完成事件
///
///
///
void OnEndWorkEventHandler(object sender, WordEventArgs e)
{
endValueDelegate end = new endValueDelegate(SetEndValue);
this.Invoke(end, e);
}
///
/// 被委托调用,专门设置进度条最大值的
///
///
private void SetMaxValue(WordEventArgs e)
{
this.probar_Test.Maximum = e.Position;
lbl_Info.Text = e.Info;
}
///
/// 被委托调用,专门设置进度条当前值的
///
///
private void SetNowValue(WordEventArgs e)
{
this.probar_Test.Value = e.Position;
lbl_Info.Text = e.Info;
}
///
/// 被委托调用,专门设置进度条结束后的处理
///
///
private void SetEndValue(WordEventArgs e)
{
this.probar_Test.Value = e.Position; ;
lbl_Info.Text = e.Info;
MessageBox.Show(e.Info);
}
}
}
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
namespace TestProgressBar
{
public delegate void WorkEventHandler(object sender, WordEventArgs e);
class Worker
{
///
/// 开始事件
///
public event WorkEventHandler OnStartWorkEvent;
///
/// 执行时事件
///
public event WorkEventHandler OnDoWorkEvent;
///
/// 结束事件
///
public event WorkEventHandler OnEndWorkEvent;
public Worker()
{ }
private void SendEvents(WordEventArgs e)
{
switch (e.Stage)
{
case WorkStage.BeginWork:
if (OnStartWorkEvent != null) OnStartWorkEvent(this, e);
break;
case WorkStage.DoWork:
if (OnDoWorkEvent != null) OnDoWorkEvent(this, e);
break;
case WorkStage.EndWork:
if (OnEndWorkEvent != null) OnEndWorkEvent(this, e);
break;
default:
if (OnDoWorkEvent != null) OnDoWorkEvent(this, e);
break;
}
}
public void Work()
{
int iTotal = 100;//计算工作量，这里是设置为100，如果是上传，或者下载，就是文件的大小，循环遍历的话，这就是最大的那个循环数
SendEvents(new WordEventArgs(WorkStage.BeginWork, "开始工作！", iTotal));
int iCount = 0;
for (int i = 0; i < iTotal; i++)
{
Thread.Sleep(50);//休息50毫秒,模拟执行大数据量操作,
iCount = i; // 此处计算所处的位置，如果是上传或者下载了多少了，
SendEvents(new WordEventArgs(WorkStage.DoWork, "正在工作ing " + iCount.ToString(), iCount));
}
SendEvents(new WordEventArgs(WorkStage.EndWork, "结束工作！", iTotal));
}
}
class WordEventArgs : EventArgs
{
//主要是用来往外传递信息的
public WorkStage Stage;
public string Info = "";
public int Position = 0;
public WordEventArgs(WorkStage Stage, string Info, int Position)
{
this.Stage = Stage;
this.Info = Info;
this.Position = Position;
}
}
public enum WorkStage
{
BeginWork, //准备工作
DoWork, //正在工作
EndWork, //工作结束
}
}
解决方案2:
//一个模拟.....也可能不适合你,不知道你的发送文件代码是怎么写的
private void button3_Click(object sender, EventArgs e)
{
Thread thread = new Thread(new ThreadStart(Send));
thread.Start();
}
private void Send()
{
int i = 0;
while (i <= 100)
{
//显示进度 信息
this.ShowPro(i);
//循环发生文件
//模拟的
i++; //模拟发送多少
Thread.Sleep(100);
}
Thread.CurrentThread.Abort();
}
private void ShowPro(int value)
{
if (this.InvokeRequired)
{
this.Invoke(new ProgressBarShow(ShowPro), value);
}
else
{
this.progressBar1.Value = value;
this.label1.Text = value + "%";
}
}
以上介绍了“progressbar c# progressBar使用”的问题解答，希望对有需要的网友有所帮助。
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