Question

我有一个code从文件中读取信息并将其显示给用户....现在我想在向用户显示信息后STOP code WAIT以buttonpress为event启动我的textbox，因为按钮会清除button并返回用户/管理员的一些信息......

但我不知道如何打破我的代码运行并等待StringBuilder strbuildsection = new StringBuilder(); StringBuilder strbuildbetreff = new StringBuilder(); StringBuilder strbuildinhalt = new StringBuilder(); StringBuilder strbuilduser = new StringBuilder(System.Environment.UserName); StringBuilder strbuildusercheck = new StringBuilder(); foreach (string Ccat in this.ini.IniGetCategories()) { string readval = ini.IniReadValue(Ccat, "Read"); string usercheckvar = (this.ini.IniReadValue(Ccat, "SpecifyUser")); string user = System.Environment.UserName; if (readval == "0") { if (usercheckvar == user || usercheckvar.Equals("All")) { strbuildsection.Append(Ccat + Environment.NewLine); foreach (string cat in this.ini.IniGetKeys(Ccat)) { strbuildinhalt.Clear(); strbuildusercheck.Clear(); strbuildbetreff.Clear(); strbuildbetreff.Append(this.ini.IniReadValue(Ccat, "Betreff") + Environment.NewLine); strbuildinhalt.Append(this.ini.IniReadValue(Ccat, "Inhalt") + Environment.NewLine); } textBox1.AppendText(strbuildsection.ToString() + strbuildbetreff.ToString() + strbuildinhalt.ToString() + strbuildusercheck.ToString() + Environment.NewLine); strbuildsection.Clear(); // HERE I want to stop my process and wait until the User // press the button and start my event // but i don't know how to do this // After this the loop continue and so on } private void BT_Bestaetigung_Click(object sender, EventArgs e) { CODE }被迫按下......

很多

button

所以如果{{1}}被按下，我想开始我的'事件'，如果没有，代码应该等待这个

Answer 1

因为您似乎将代码放在您向用户显示的表单中，这会阻止您停止等待用户响应，因为您仍在循环中。

解决方案是使用单独的模态对话框：

创建一个单独的Form，它在循环中构建并在必要时显示给用户 - 等待表单关闭 - 处理结果并重复直到完成。

在这个新表单中，您可以放置用户需要与之交互的控件和按钮，并在向他显示之前填充它们。

        frmConfirmationDialog myConfirmationDialog = new frmConfirmationDialog()

        //Fill in information to show to the user
        myConfirmationDialog.textBox1.AppendText(strbuildsection.ToString() + strbuildbetreff.ToString() + strbuildinhalt.ToString() + strbuildusercheck.ToString() + Environment.NewLine);

        //Open Form modally (this will stop your loop until the dialog is closed)
        DialogResult myResult = myConfirmationDialog.ShowDialog();

        if (myResult == System.Windows.Forms.DialogResult.OK)
        {
            //Do Stuff here
        }
        else //catch further type of results here (you could also work with a switch statement
        {
            //Do Stuff here
        }

BTW在关闭表单时获取DialogResult将Confirm或Cancel Buttons的DialogResult属性设置为您喜欢的值。这将导致模式窗体使用按钮的DialogResult自动关闭。如果您需要在关闭表单之前捕获内容，可以为FormClosing实现EventHandler或处理按钮的Click事件。

Answer 2

 Random rnd = new Random();
            bool stop = false;
            Thread thread = null;

            btnShow.Click += (source, e) =>
            {
                stop = true;
                MessageBox.Show("Show something");
            };

            btnClose.Click += (source, e) =>
            {
                stop = false;
            };

            if (thread == null)
            {
                thread = new Thread(() =>
                {
                    while (true) // your working loop
                    {
                        while (stop)
                        {}

                        // action of your loop 
                        Console.WriteLine(rnd.Next());

                    }
                });
                thread.Start();
           }

Answer 3

你必须这样思考：你有连续操作，而你正在等待用户交互。

在winforms应用程序中，您无法在UI线程中执行连续操作（因为您的窗口需要不断地从操作系统接收消息，即用户输入或重新绘制请求并且必须对它们作出反应，否则您将 laggy < / em>甚至冻结 UI），典型的解决方案是：

将操作拆分为子操作（它们很短并且不会导致UI滞后）;

将操作放入线程。

所以，基本上，这样做（有一种模式可以避免使用带有委托步骤的开关，但为了简单起见，我们展示了经典方式）：

_timer = new Timer(); _timer.Tick += timer_Tick; ... // in timer tick switch(_operation) { case operation1: _operation = nextoperation; // _operation++ ... break; case operation2: // do nothing, wait for button press if(_buttonPressed) _operation = nextoperation; break; case operation3: // continue after button press .. ... }

或者这样

_thread = new Thread(...) thread.Start(); ... // in thread // start operation ... // wait for button press while(_buttonPressed) Thread.Sleep(0); // continue operation ...

两种情况

// in button click event _buttonPressed = true;

按下按钮后运行事件

3 个答案: