C# 进度条开始和停止按钮单击使用线程

Progress bar Start and Stop on Button Click using thread

提问by coolprarun

I have created a C# windows application in that I inserted the progress bar.

我创建了一个 C# windows 应用程序，其中插入了进度条。

When a button is clicked the progress bar should appear and then it should start the process for some 2 to 3 seconds and when the process bar is completed it should be hidden.

当一个按钮被点击时，进度条应该会出现，然后它应该开始这个过程大约 2 到 3 秒，当过程条完成时它应该被隐藏。

I have used this code to solve this but its not working.

我已经使用此代码来解决这个问题，但它不起作用。

While the Progress bar is running, the label box that should be like "Generating... 45%" and after completing the label box should be "Generated 100%..", but when I insert the label its showing some errors.

当进度条运行时，标签框应该是“生成... 45%”，完成标签框后应该是“生成 100% ..”，但是当我插入标签时，它显示了一些错误。

Here is the picture before clicking the Generate button..

这是单击“生成”按钮之前的图片..

On Processing I Should get like this..

On Final Process id should be like this and the progress bar should hidden..

在处理时，我应该像这样..

在最终进程中，id 应该像这样，进度条应该隐藏..

        ProgressBar1.Visible = true;

        if (isProcessRunning)
        {
            MessageBox.Show("A process is already running.");
            return;
        }

        Thread backgroundThread = new Thread(
            new ThreadStart(() =>
            {
                isProcessRunning = true;
                for (int n = 0; n < 100; n++)
                {
                    Thread.Sleep(1);
                    progressBar1.BeginInvoke(new Action(() => progressBar1.Value = n));
                }
                MessageBox.Show("Generated!!!");


                if (progressBar1.InvokeRequired)
                    progressBar1.BeginInvoke(new Action(() => progressBar1.Value = 0));
                isProcessRunning = false;
            }

        ));

        // Start the background process thread
        backgroundThread.Start();

采纳答案by zey

I suggest you to use BackgroundWorkerto show progress bar in C# winform .
Here is an example ,

我建议您使用BackgroundWorker在 C# winform 中显示进度条。
这是一个例子，

    public partial class Form1 : Form
{
    BackgroundWorker bgw = new BackgroundWorker();       
    public Form1()
    {
        InitializeComponent();
        label1.Text = "";
        label2.Text = "";
    }

    private void button1_Click_1(object sender, EventArgs e)
    {
        bgw.DoWork += new DoWorkEventHandler(bgw_DoWork);
        bgw.ProgressChanged += new ProgressChangedEventHandler(bgw_ProgressChanged);
        bgw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgw_RunWorkerCompleted);
        bgw.WorkerReportsProgress = true;
        bgw.RunWorkerAsync();
    }

    void bgw_DoWork(object sender, DoWorkEventArgs e)
    {
        int total = 57; //some number (this is your variable to change)!!

        for (int i = 0; i <= total; i++) //some number (total)
        {
            System.Threading.Thread.Sleep(100);
            int percents = (i * 100) / total;
            bgw.ReportProgress(percents, i);
            //2 arguments:
            //1. procenteges (from 0 t0 100) - i do a calcumation 
            //2. some current value!
        }
    }

    void bgw_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
        label1.Text = String.Format("Progress: {0} %", e.ProgressPercentage);
        label2.Text = String.Format("Total items transfered: {0}", e.UserState);
    }

    void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
         //do the code when bgv completes its work
    }
}

You can set your progress bar's visible to false in bgw_RunWorkerCompleted.
The following links will show how to use backgroundworker
DotNetPerls
MSDN Reference
CodeProject
Good Luck :)

您可以在 中将进度条的可见性设置为 false bgw_RunWorkerCompleted。
以下链接将展示如何使用backgroundworker
DotNetPerls
MSDN 参考
代码项目
祝你好运:)

回答by coolprarun

This is the Code i am using backgroundWorker..

这是我正在使用 backgroundWorker 的代码。

    public partial class Form1 : Form
{

    BackgroundWorker bgw = new BackgroundWorker();      
    public Form1()
    {
        InitializeComponent();
        label3.Text = "";


        this.StartPosition = FormStartPosition.CenterScreen;
    }

    private void button2_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }


    private void btn_generate_Click(object sender, EventArgs e)
    {
        progressBar1.Visible = true;
        bgw.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
        bgw.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
        bgw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
        bgw.WorkerReportsProgress = true;
        bgw.RunWorkerAsync();
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
       int total = 100; //some number (this is your variable to change)!!

        for (int i = 0; i <= total; i++) //some number (total)
        {
            System.Threading.Thread.Sleep(10);
            int percents = (i * 100) / 100;
            bgw.ReportProgress(percents, i);

        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
        label3.Text = String.Format("Progress: {0} %", e.ProgressPercentage);
        if (e.ProgressPercentage == 100)
        {
            label3.Text = String.Format("Generated.. {0} %", e.ProgressPercentage);

        }
       // label2.Text = String.Format("Total items transfered: {0}", e.UserState);
    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        progressBar1.Visible = false;
    }



}`

In this There is a problem in the below code when i click the button for first time the progress bar runs one time and if i clicked second time it runs for 2 times and so on.. other wise the code is perfectly working..

在这个下面的代码中有一个问题，当我第一次点击按钮时，进度条运行一次，如果我第二次点击它运行两次，依此类推..否则代码完美运行..