如何为我的应用程序创建Sleep方法

时间:2013-06-01 17:43:28

标签: c# methods wait

我想创建一个让我的应用程序等待X秒的方法,然后继续执行一行脚本。例如,在阅读了许多类似的帮助主题之后,这是我到目前为止的代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
        {
        public Form1()
        {
            InitializeComponent();

            methods.WriteTextToScreen(label1, "Hello!");
            methods.sleepFor(1);
            methods.WriteTextToScreen(label1, "Welcome!");
            methods.sleepFor(1);
            methods.WriteTextToScreen(label1, "Allo!");
        }

        public class methods
        {
            public static int timeSlept;

            public static void WriteTextToScreen(Label LabelName, string text)
            {

                LabelName.Text = text;
            }


            public static void sleepFor(int seconds)
            {
                timeSlept = 0;

                System.Timers.Timer newTimer = new System.Timers.Timer();
                newTimer.Interval = 1000;
                newTimer.AutoReset = true;

                newTimer.Elapsed += new     System.Timers.ElapsedEventHandler(newTimer_Elapsed);

            newTimer.Start();

            while (timeSlept < seconds)
            {
                Application.DoEvents();
            }

            Application.DoEvents();

        }

        public static void newTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            timeSlept = IncreaseTimerValues(ref timeSlept);
            Application.DoEvents();
        }

        public static int IncreaseTimerValues(ref int x)
        {
            int returnThis = x + 1;
            return returnThis;
        }

    }

}
}

我想要做的是让我的程序执行methods.WriteTextToScreen(label1,“Hello!”) 然后等待1秒钟,然后以同样的方式继续。问题是表单I显示文本根本没有出现,直到它写了“Allo!”。在屏幕上,所以它第一次出现就已经说明了。我做错了什么,或者没有办法做到这一点?

1 个答案:

答案 0 :(得分:0)

表单在构造之前不显示,即Form1中的所有代码都已运行。有关表单构造函数的信息,请参阅此处:http://msdn.microsoft.com/en-us/library/system.windows.forms.form.form.aspx

要解决您的问题,您可以将writeTextToScreen和sleep代码移动到加载方法的表单中。见http://msdn.microsoft.com/en-us/library/system.windows.forms.form.onload.aspx