如何在C#中的setupform中使用progressbarcontrol? [英] How to use progressbarcontrol in setupform in c#?

问题描述

请回答上述问题，并提供示例代码.

Please reply to the above question and give me the sample code.

推荐答案

将ProgressBar拖到Form上.当您需要设置新的进度百分比时，请设置ProgressBar的Value属性.

您可能会发现，使用BackgroundWorker在其DoWork事件处理程序中进行设置"会更好.将其WorkerReportsProgress属性设置为true并处理其ProgressChanged事件.

当您需要更新进度时，请调用BackgroundWorker的ReportProgress方法，并在处理程序中更新ProgressBar

Drag a ProgressBar onto the Form. When you need to set a new progress percentage, set the ProgressBar''s Value property.

You may find it better to use a BackgroundWorker to do the ''set up'' in it''s DoWork event handler. Set it''s WorkerReportsProgress property to true and handle it''s ProgressChanged event.

When you need to update the progress, call the BackgroundWorker''s ReportProgress method and in the handler update the ProgressBar

using System;
using System.ComponentModel;
using System.Threading;
using System.Windows.Forms;
public partial class FormSetUp : Form
{
    BackgroundWorker backgroundWorker;
    ProgressBar progressBar;
    public FormSetUp()
    {
        InitializeComponent();
        Shown += new EventHandler(FormSetUp_Shown);
        backgroundWorker = new BackgroundWorker();
        backgroundWorker.WorkerReportsProgress = true;
        backgroundWorker.DoWork += new DoWorkEventHandler(
            backgroundWorker_DoWork);
        backgroundWorker.ProgressChanged += new ProgressChangedEventHandler(
            backgroundWorker_ProgressChanged);
        backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(
            backgroundWorker_RunWorkerCompleted);
        progressBar = new ProgressBar();
        Controls.Add(progressBar);
    }
    void FormSetUp_Shown(object sender, EventArgs e)
    {
        backgroundWorker.RunWorkerAsync();
    }
    void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        int percentage = 0;
        backgroundWorker.ReportProgress(percentage);
        // Do something
        Thread.Sleep(1000); // Simulate work
        percentage += 50;
        backgroundWorker.ReportProgress(percentage);
        // Do something else
        Thread.Sleep(1000); // Simulate work
        percentage += 50;
        backgroundWorker.ReportProgress(percentage);
        Thread.Sleep(1000);
    }
    void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar.Value = e.ProgressPercentage;
    }
    void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        Close();
    }
}

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