C#-WPF ProgressBar进度条-阿里云开发者社区

进度条常用在加载，下载，导出一些比较耗时的地方，利用进度条能让用户看到实时进展，能有更好的用户体验……

直接开始

新建一个wpf项目，然后在主窗口添加一个按钮，用来控制进度的开始。加一个进度条控件progressbar。双击按钮，为按钮添加事件，代码直接循环模仿进度的进行……

privatevoidbutton4_Click(objectsender, RoutedEventArgse){    
for (inti=0; i<=100; i++)
        {            
//当前进度，最大值默认100progressBar1.Value=i;
Thread.Sleep(10);
        }
}

最简单的进度条已经完成，好的，这里运行程序执行，你会发现一个问题，点开始之后，界面直接卡住，回过神来，进度条已经满了，这和我们想像有点也不一样啊。你在ui线程里面执行了耗时的操作，就会让界面进入假死状态，这时候我们就要改进一下，使用多线程。

多线程开始

我们重新开启一个线程来模仿进度条进度，在按钮的点击事件下进行调用。好了，这次在点击按钮，我们可以看到进度条正常的显示进度情况了，不错，不错，是这种效果。

privatevoidProgressBegin() {
Threadthread=newThread(newThreadStart(() =>    {         
for (inti=0; i<=100; i++)
        {            
this.progressBar1.Dispatcher.BeginInvoke((ThreadStart)delegate{ this.progressBar1.Value=i; });
Thread.Sleep(100);
        }
    }));
thread.Start();
}

新窗口来一个

这个写法是一样的，只不过在新窗口弄一个，用弹窗的方式来显示，有时候还是会用到的。新建一个wpf窗口，同样加入一个进度条控件，在主窗口的按钮点击事件中写入新窗口的创建和显示，在新窗口的构造函数中调用，进度条开始进度的方法。

//window1.xaml<Windowx:Class="progressbartest.Window1"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="Window1"Height="217"Width="300"><Grid><ProgressBarHeight="24"HorizontalAlignment="Left"Margin="12,72,0,0"Name="progressBar1"VerticalAlignment="Top"Width="254"Foreground="#FF2EAFF1"/></Grid></Window>//window1.xaml.csusingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Windows;usingSystem.Windows.Controls;usingSystem.Windows.Data;usingSystem.Windows.Documents;usingSystem.Windows.Input;usingSystem.Windows.Media;usingSystem.Windows.Media.Imaging;usingSystem.Windows.Shapes;usingSystem.Threading;namespaceprogressbartest{    
/// <summary>/// Window1.xaml 的交互逻辑/// </summary>publicpartialclassWindow1 : Window    {        
publicWindow1()
        {
InitializeComponent();
ProgressBegin();
        }        
privatevoidProgressBegin()
        {
Threadthread=newThread(newThreadStart(() =>            {                
for (inti=0; i<=100; i++)
                {                    
this.progressBar1.Dispatcher.BeginInvoke((ThreadStart)delegate { this.progressBar1.Value=i; });
Thread.Sleep(100);
                }
            }));
thread.Start();
        }
    }
}

BackgroundWork方式

BackgroundWorker类允许您在单独的线程上执行某个可能导致用户界面（UI）停止响应的耗时操作（比如文件下载数据库事务等），并且想要一个响应式的UI来反应当前耗时操作的进度。那岂不是用来做进度条再合适不过了，可以利用单独线程来执行耗时操作，还能反应操作的进度。

当然，如果你要使用它提供的方法，必须要先设置一下它的某些属性，不然就没法使用，比如：要使用ReportProgress()（报告进度）的方法，先要设置WorkerReportsProgress=true。其他的设置，可以查官方文档哦。

privateBackgroundWorkerbgworker=newBackgroundWorker();
privatevoidbutton3_Click(objectsender, RoutedEventArgse)
{
InitWork();
bgworker.RunWorkerAsync();
}
/// <summary>/// 初始化bgwork/// </summary>privatevoidInitWork()
{
bgworker.WorkerReportsProgress=true;
bgworker.DoWork+=newDoWorkEventHandler(DoWork);
bgworker.ProgressChanged+=newProgressChangedEventHandler(BgworkChange);
}
privatevoidDoWork(objectsender, DoWorkEventArgse)
{    
for (inti=0; i<=100; i++)
    {
bgworker.ReportProgress(i);
Thread.Sleep(100);
    }
}
/// <summary>///改变进度条的值/// </summary>privatevoidBgworkChange(objectsender, ProgressChangedEventArgse) 
{    
this.progressBar1.Value=e.ProgressPercentage;
}

源代码

//mainwindow.xaml<Windowx:Class="progressbartest.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="MainWindow"Height="350"Width="525"><Grid><ProgressBarHeight="23"HorizontalAlignment="Left"Margin="32,124,0,0"Name="progressBar1"VerticalAlignment="Top"Width="432"/><ButtonContent="多线程开始"Height="23"HorizontalAlignment="Left"Margin="123,54,0,0"Name="button1"VerticalAlignment="Top"Width="75"Click="button1_Click"/><ButtonContent="新窗口开始"Height="23"HorizontalAlignment="Left"Margin="219,54,0,0"Name="button2"VerticalAlignment="Top"Width="75"Click="button2_Click"/><ButtonContent="BackgroundWorker方式"Height="23"HorizontalAlignment="Left"Margin="310,54,0,0"Name="button3"VerticalAlignment="Top"Width="154"Click="button3_Click"/><ButtonContent="开始"Height="23"HorizontalAlignment="Left"Margin="32,54,0,0"Name="button4"VerticalAlignment="Top"Width="75"Click="button4_Click"/></Grid></Window>//mainwindow.xaml.csusingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows;
usingSystem.Windows.Controls;
usingSystem.Windows.Data;
usingSystem.Windows.Documents;
usingSystem.Windows.Input;
usingSystem.Windows.Media;
usingSystem.Windows.Media.Imaging;
usingSystem.Windows.Navigation;
usingSystem.Windows.Shapes;
usingSystem.Threading;
usingSystem.ComponentModel;
namespaceprogressbartest{    
/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>publicpartialclassMainWindow : Window    {        
privateBackgroundWorkerbgworker=newBackgroundWorker();        
publicMainWindow()
        {
InitializeComponent();
        }        
privatevoidbutton1_Click(objectsender, RoutedEventArgse)
        {
ProgressBegin();
        }
privatevoidProgressBegin() 
        {
Threadthread=newThread(newThreadStart(() =>            {                
for (inti=0; i<=100; i++)
                {           
this.progressBar1.Dispatcher.BeginInvoke((ThreadStart)delegate{ this.progressBar1.Value=i; });
Thread.Sleep(100);
                }
            }));
thread.Start();
        }        
privatevoidbutton2_Click(objectsender, RoutedEventArgse)
        {
Window1window=newWindow1();
window.Show();
        }       
/// <summary>/// 初始化bgwork/// </summary>privatevoidInitWork()
        {
bgworker.WorkerReportsProgress=true;
bgworker.DoWork+=newDoWorkEventHandler(DoWork);
bgworker.ProgressChanged+=newProgressChangedEventHandler(BgworkChange);
        }
privatevoidDoWork(objectsender, DoWorkEventArgse)
        {            
for (inti=0; i<=100; i++)
            {
bgworker.ReportProgress(i);
Thread.Sleep(100);
            }
        }
/// <summary>///改变进度条的值/// </summary>privatevoidBgworkChange(objectsender, ProgressChangedEventArgse) 
        {            
this.progressBar1.Value=e.ProgressPercentage;
        }        
privatevoidbutton3_Click(objectsender, RoutedEventArgse)
        {
InitWork();
bgworker.RunWorkerAsync();
        } 
privatevoidbutton4_Click(objectsender, RoutedEventArgse)
        {            
for (inti=0; i<=100; i++)
            {
progressBar1.Value=i;
Thread.Sleep(10);
            }
        }
    }
}
//window1.xaml<Windowx:Class="progressbartest.Window1"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="Window1"Height="217"Width="300"><Grid><ProgressBarHeight="24"HorizontalAlignment="Left"Margin="12,72,0,0"Name="progressBar1"VerticalAlignment="Top"Width="254"Foreground="#FF2EAFF1"/></Grid></Window>//window1.xaml.csusingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Windows;usingSystem.Windows.Controls;usingSystem.Windows.Data;usingSystem.Windows.Documents;usingSystem.Windows.Input;usingSystem.Windows.Media;usingSystem.Windows.Media.Imaging;usingSystem.Windows.Shapes;usingSystem.Threading;namespaceprogressbartest{    
/// <summary>/// Window1.xaml 的交互逻辑/// </summary>publicpartialclassWindow1 : Window    {        
publicWindow1()
        {
InitializeComponent();
ProgressBegin();
        }        
privatevoidProgressBegin()
        {
Threadthread=newThread(newThreadStart(() =>            {                
for (inti=0; i<=100; i++)
                {
this.progressBar1.Dispatcher.BeginInvoke((ThreadStart)delegate { this.progressBar1.Value=i; });
Thread.Sleep(100);
                }
            }));
thread.Start();
        }
    }
}

参考资料

BackgroundWorker使用总结

https://blog.csdn.net/coderookieguo/article/details/72723310

C#-WPF ProgressBar进度条

直接开始

多线程开始

新窗口来一个

BackgroundWork方式

源代码

参考资料

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