循环更改标签

本文关键字：标签 循环 | 更新日期: 2023-09-27 18:36:17

 public partial class Balloon : Form
    {
        public Balloon()
        {
            InitializeComponent();
            TopMost = true;
            Rectangle r = Screen.PrimaryScreen.WorkingArea;
            this.StartPosition = FormStartPosition.Manual;
            this.Location = new Point(Screen.PrimaryScreen.WorkingArea.Width - this.Width - 1, Screen.PrimaryScreen.WorkingArea.Height - this.Height - 8);

            InstallStart2();
        }
        private async void InstallStart2()
        {
            if (Dot35 == "Yes")
            {
                this.Titel.Text = "The Knowhow Installer is installing:";
                this.Action.Text = "Microsoft .Net Framework 2 & 3";
                if (File.Exists(root + Installfolder + "dotnetfx35.exe"))
                {
                    Process process = Process.Start(root + Installfolder + "dotnetfx35.exe", "/q /norestart");
                    while (!process.HasExited) ;
                    bool installFinished1 = false;
                    int k = -1;
                    string[] dots = new string[] { "Microsoft .Net Framework 2 & 3.", "Microsoft .Net Framework 2 & 3..", "Microsoft .Net Framework 2 & 3..." };
                    while (!installFinished1)
                    {
                        Action.Text = dots[++k % 3];
                        await Task.Delay(TimeSpan.FromSeconds(1.0));
                    }
                    process.WaitForExit();
                }
                else
                {
                    this.TopMost = false;
                    int num = (int)MessageBox.Show("dotnetfx35.exe not found", "Error");
                }
            }
            await Task.Delay(TimeSpan.FromSeconds(2.0));



            if (Dot45 == "Yes")
            {
                this.Titel.Text = "The Knowhow Installer is installing:";
                this.Action.Text = "Microsoft .Net Framework 4.5";
                if (File.Exists(root + Installfolder + "dotnetFx45.exe"))
                {
                    Process process = Process.Start(root + Installfolder + "dotnetFX45.exe", "/q");
                    bool installFinished = false;
                    int k = -1;
                    string[] dots = new string[] { "Microsoft .Net Framework 4.5.", "Microsoft .Net Framework 4.5..", "Microsoft .Net Framework 4.5..." };
                    while (!installFinished)
                    {
                        Action.Text = dots[++k % 3];
                        await Task.Delay(TimeSpan.FromSeconds(1.0));
                    }


                    while (!process.HasExited) ;
                }
                else
                {
                    this.TopMost = false;
                    int num = (int)MessageBox.Show("dotnetFx45.exe not found", "Error");
                }
            }
            await Task.Delay(TimeSpan.FromSeconds(2.0));

            this.Action.Text = "Done";
            new SoundPlayer(root + otherfolder + "Done.wav").Play();
            await Task.Delay(TimeSpan.FromSeconds(5.0));
            Environment.CurrentDirectory = dir;
            this.Close();
            new InstallDone().Show();


        }
    }

这是代码的一部分，它适用于第一次安装，但我找不到放在哪里bool installFinished1 = true;让它进入下一个安装。现在它只是停留在Microsoft.Net Framework 4.5...（它在一个循环中从 1 个点变为 3 个点）

循环更改标签

如果必须await，那么这是最简单的方法：

bool installFinished = false;
int k = -1;
string[] dots = new string[] { "Installing.", "Installing..", "Installing..." };
while (!installFinished)
{
    Action.Text = dots[++k % 3];
    await Task.Delay(TimeSpan.FromSeconds(1.0));
}
Action.Text = "Finished";

完成安装后，设置：

installFinished = true;

上面的循环将停止，Action.Text设置为 Finished 。

其他方式，您可以使用计时器。

编辑：

基于更新的代码：

using System.Threading;
bool installFinished = false;
void Install_net45()
{
    Process process = Process.Start(root + Installfolder + "dotnetFX45.exe", "/q");
    while (!process.WaitForExit(1000))
    {
    }
    installFinished = true;
    // Clean up
}
private async void InstallStart2()
{
    if (Dot45 == "Yes")
    {
        this.Titel.Text = "The Knowhow Installer is installing:";
        this.Action.Text = "Microsoft .Net Framework 4.5";
        if (File.Exists(root + Installfolder + "dotnetFx45.exe"))
        {
            installFinished = false;
            Thread t = new Thread(Install_net45);
            t.Start();
            int k = -1;
            string[] dots = new string[] { "Installing.", "Installing..", "Installing..." };
            while (!installFinished)
            {
                Action.Text = dots[++k % 3];
                await Task.Delay(TimeSpan.FromSeconds(1.0));
            }
            Action.Text = "Finished";
            MessageBox.Show("Test");
        }
        else
        {
            this.TopMost = false;
            int num = (int)MessageBox.Show("dotnetFx45.exe not found", "Error");
        }
    }
}

你可以执行以下操作：

Action.Text = "Installing.";
Process process = Process.Start(root + Installfolder + "dotnetFX45.exe", "/q");
while(!process.WaitForExit(1000)){
   Action.Text += ".";
}

但是，如果在 Windows 窗体应用程序的事件处理程序中执行此操作，则此操作将无法按预期工作。您将阻止 UI 线程，因此它永远没有机会重新绘制和显示更新的文本。在这种情况下，您应该使用 BackgroundWorker ，并在DoWork中显示以下内容：

Process process = Process.Start(root + Installfolder + "dotnetFX45.exe", "/q");
while(!process.WaitForExit(1000)){
   worker.ReportProgress(0.5);
}

然后通过在ProgressChanged中添加 . s 来更新 Text 属性。

使用 RxNet，示例代码

var interval = Observable.Interval(TimeSpan.FromMilliseconds(1000));
interval.Subscribe(
    () => Action.Text += ".", 
    () => Action.Text = "Completed");
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