如何将进度条添加到下面的进程

更新时间：2023-12-02 22:22:58

进度bar是一个UI组件。因此，它必须在主UI线程中执行。我假设您的UnZip方法非常耗时，并且您想要衡量其进度。

A progress bar is a UI component. As such it must execute in the main UI thread. I assume that your UnZip method is time consuming and that you want to measure its progress.

最简单的方法是将UnZip作为 BackgroundWorker 执行[ ^ ]。

The simplest way is to execute UnZip as a BackgroundWorker[^].

宣布UnZip为BackgroundWorker

Declare UnZip as a BackgroundWorker

private System.ComponentModel.BackgroundWorker UnZip_BW;

作为类变量。

在构造函数中，将事件处理程序附加到UnZip_BW

as a class variable.

In the constructor, attach event handlers to UnZip_BW

UnZip_BW.DoWork += new DoWorkEventHandler ( UnZip_DoWork );
UnZip_BW.ProgressChanged += 
    new ProgressChangedEventHandler ( UnZip_ProgressChanged );

你做的似乎不需要工人完成的事件处理程序，但如果你这样做，请使用

You do not appear to need a worker completed event handler, but if you do, use

UnZip_BW.RunWorkerCompleted += 
    new RunWorkerCompletedEventHandler ( UnZip_RunWorkerCompleted );

并将UnZip_RunWorkerCompleted事件处理程序声明为

and declare the UnZip_RunWorkerCompleted event handler as

private void UnZip_RunWorkerCompleted (
                                  object                      sender, 
                                  RunWorkerCompletedEventArgs e )
    {
    if ( e.Error != null )
        {
                                        // handle exception
        MessageBox.Show ( e.Error.Message );
        }
    else if ( e.Cancelled )
        {
                                        // report cancellation
        result_LAB.Text = "Canceled";
        }
    else
        {
                                        // report success
        result_LAB.Text = e.Result.ToString();
        }
    }

其中result_LAB在表格中声明。

声明UnZip_DoWork方法：

where result_LAB is declared in the Form.

Declare the UnZip_DoWork method:

private void UnZip_DoWork ( object          sender, 
                            DoWorkEventArgs e )
    {   
    BackgroundWorker worker = ( BackgroundWorker ) sender;

    :
    :
    }

将UnZip方法内容放入UnZip_DoWork方法。

声明UnZip_ProgressChanged方法。它已作为UnZip_ProgressChanged事件的事件处理程序连接。

Place your UnZip method contents into the UnZip_DoWork method.

Declare the UnZip_ProgressChanged method. It is already wired as the event handler for the UnZip_ProgressChanged event.

private void UnZip_ProgressChanged ( object                   sender,
                                     ProgressChangedEventArgs e )
    {
    this.progressBar1.Value = e.ProgressPercentage;
    }

progressBar1假定已在您的表格中声明。

这是困难的部分鉴于您提供的代码。在UnZip_DoWork方法的某个位置，当要报告进度时，计算已完成工作的百分比（percent_completed）并引发ReportProgress事件。

progressBar1 is assumed to have been declared in your Form.

Here's the hard part given the code you have provided. Somewhere in the UnZip_DoWork method, when progress is to be reported, compute the percentage of work completed (percent_completed) and raise the ReportProgress event.

int  percent_completed = 0;
:
:
worker.ReportProgress ( percent_completed );

问题是我在你提供的代码中没有看到钩子，你可以确定完成的百分比。 没有它，你就没有进度条。

在构造函数中，在你附加事件处理程序之后，添加代码

The problem is that I do not see a "hook" in your supplied code where you can determine the percent completed. Without that, you cannot have a progress bar.

In the constructor, after you've attached the event handlers, add the code

UnZip_BW.RunWorkerAsync ( );

希望有所帮助。

Hope that helps.

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如何将进度条添加到下面的进程

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