问基于C#桌面的应用程序的加载器动画
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Stack Overflow用户

提问于 2012-11-15 02:33:56

回答 3查看 2.4K关注 0票数 0

有没有一种在jquery ajax beforeSend中类似并在C#中完成的方法？

因为在网页中，我通常会像按下add按钮一样设置beforendSend:，这是一个在complete:中显示图像和隐藏图像的函数

现在我要做的是在C#桌面应用程序中。有没有类似的东西？就像使用进度条一样

.net

desktop-application

loader

回答 3

Stack Overflow用户

发布于 2012-11-15 02:44:27

这是winforms应用程序吗？它有一个可以使用的ProgressBar控件。也有一个用于WPF的。但您可能希望在后台线程上进行处理，以便您的UI保持响应并更新您的进度条。

票数 1

Stack Overflow用户

发布于 2012-11-15 03:12:15

您需要执行后台处理和UI回调。下面是一个非常简单的例子：

private void button3_Click(object sender, EventArgs e)
    {
        ProcessingEvent += AnEventOccurred;

        ThreadStart threadStart = new ThreadStart(LongRunningProcess);
        Thread thread = new Thread(threadStart);
        thread.Start();
    }

    private void LongRunningProcess()
    {
        RaiseEvent("Start");

        for (int i = 0; i < 10; i++)
        {
            RaiseEvent("Processing " + i);
            Thread.Sleep(1000);
        }

        if (ProcessingEvent != null)
        {
            ProcessingEvent("Complete");
        }
    }

    private void RaiseEvent(string whatOccurred)
    {
        if (ProcessingEvent != null)
        {
            ProcessingEvent(whatOccurred);
        }
    }

    private void AnEventOccurred(string whatOccurred)
    {
        if (this.InvokeRequired)
        {
            this.Invoke(new Processing(AnEventOccurred), new object[] { whatOccurred });
        }
        else
        {
            this.label1.Text = whatOccurred;
        }
    }

    delegate void Processing(string whatOccurred);

    event Processing ProcessingEvent;

票数 1

Stack Overflow用户

发布于 2016-11-24 09:24:03

您需要实现如下所示：

    FrmLoading f2 = new FrmLoading();   // Sample form whose Load event takes a long time
    using (new PleaseWait(this.Location, () => Fill("a")))  // Here you can pass method with parameters
          { f2.Show(); }

PleaseWait.cs

public class PleaseWait : IDisposable
{
    private FrmLoading mSplash;

    //public delegate double PrdMastSearch(string pMastType);
    public PleaseWait(Point location, Action methodWithParameters)
    {
        //mLocation = location;
        Thread t = new Thread(workerThread);
        t.IsBackground = true;
        t.SetApartmentState(ApartmentState.STA);
        t.Start();
        methodWithParameters();
    }
    public void Dispose()
    {
        mSplash.Invoke(new MethodInvoker(stopThread));
    }
    private void stopThread()
    {
        mSplash.Close();
    }
    private void workerThread()
    {
        mSplash = new FrmLoading();   // Substitute this with your own
        mSplash.StartPosition = FormStartPosition.CenterScreen;
        //mSplash.Location = mLocation;
        mSplash.TopMost = true;
        Application.Run(mSplash);
    }
}