C＃进度条 - 不能换我的头周围 [英] C# Progress bar - can't wrap my head around it

问题描述

我有一个程序，通过文件需要循环的文件夹中，与该文件的名称在其他地方创建一个新的文件夹，然后提出一个共同文件文件夹中。直到我们有什么该文件夹中（在列表框列出）进行冲洗重复。

I have a program that takes loops through files in a folder, creates a new folder elsewhere with that file name, then puts a common file in that folder. rinse repeat until we are done with whats in that folder (listed in a listbox).

我决定我要成为看中，并有进度条。我从概念上理解，我是一个单位计数（在 listbox.items.count ）每次迭代..我所编码的和行之有效的。

I decided I want to be fancy and have a progress bar. I conceptually understand that I am increment the count by one (to the listbox.items.count) for each iteration.. which I have coded and works well.

我也明白了的DoWork 事件是进度条才算数，我怎么拿到两网？难道我传递一个专柜的DoWork 每次迭代？

I also understand that the DoWork event is what counts for the progress bar, how do I get the two to mesh? Do I pass a counter to the DoWork for each iteration?

我只是缺少从我的主代码循环到柜台的DoEvents的桥梁。

I am just missing the bridge from my main code loop to the DoEvents counter.

推荐答案

使用一个如图所示的BackgroundWorker：

Use a backgroundworker as shown:

 BackgroundWorker worker = new BackgroundWorker();
 worker.WorkerReportsProgress = true;
 worker.DoWork += new DoWorkEventHandler(update_DoWork);
 worker.ProgressChanged += new ProgressChangedEventHandler(update_ProgressChanged);
 worker.RunWorkerAsync();

您需要一个ProgressChangedEventHandler。然后你需要，当你想更新进度条（这将是在DoWork的方法）来使用ReportProgress。此方法将调用ProgressChangedEventHandler

You need a ProgressChangedEventHandler. Then you will need to use ReportProgress when you want to update the progress bar (this will be in the DoWork method). This method will call the ProgressChangedEventHandler.

int percentProgress = 10;
worker.ReportProgress(percentProgress)

一ProgressChangedEventHandler的一个例子：

An example of a ProgressChangedEventHandler:

 private void update_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
           progressBar.Value = (e.ProgressPercentage);
        }

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