如何使标签滚动文字来回？ [英] How to make a label scroll a word back and forth?

问题描述

我想出了制作一个标签滚动字一侧，然后改变其词，像这样

I came up with the idea of making a label scroll a word to one side and then change the word and scroll back to the other like so

   "ping           "
   " ping          "
   "  ping         "
   "   ping        "
   "    ping       "
   "     ping      "
   "      ping     "
   "       ping    "
   "        ping   "
   "         ping  "
   "          ping "
   "           ping"
   "           pong"
   "          pong "
   "         pong  "
   "        pong   "
   "       pong    "
   "      pong     "
   "     pong      "
   "    pong       "
   "   pong        "
   "  pong         "
   " pong          "
   "pong           "

我希望它做的^^只在一个恒定的循环，但我不知道我怎么会甚至开始这样做，我会很感激，如果有人可以帮助我。文本的最大长度必须是15个字符。

I want it to do ^^ only in a constant loop but I don't know how I would even get started doing that I would REALLY appreciate it if someone could help me with this. The max length of the text has to be 15 characters.

我不在乎它是否平滑滚动。

I don't care if it is smooth scrolling.

我想这是一个WinForms应用程序并使用框架4.0。

I want it to be a Winforms application and use .Net framework 4.0.

推荐答案

请for循环运行从0到11（15 - 的平长度）。随着新的字符串（''，我）您可以创建一个字符串，它是 I 空格的长。然后设置标签的这个空间字符串串联用平的文字。

Make a for-loop that runs from 0 to 11 (15 - length of "ping"). With new String(' ', i) you can create a string that is i spaces long. Then set the Text of your label to this space string concatenated with the word "ping".

现在你可以让另一个循环，从11运行到0做同样的但用傍。

Now you can make another loop, running from 11 down to 0 doing the same but with the word "pong".

如果您括在一个无限循环两个环路（，而（真）{...} ），这将无限期地运行。

If you enclose both loops in an endless loop (while (true) { ... }) this will run indefinitely.

您可能还需要您设置与发。睡眠（200）。在哪里您指定的时间以毫秒为单位。

You also might want to add a pause each time after you set the label text with Thread.Sleep(200). Where you specify the time is in milliseconds.

编辑（因为它不是作业）：

EDIT (since it is not homework):

转到在属性窗口中的事件标签，并添加所示事件处理程序

Go to the events tab in the properties window and add a Shown event handler

private void frmMarquee_Shown(object sender, EventArgs e)
{
    while (true) {
        for (int i = 0; i <= 11; i++) {
            label1.Text = new String(' ', i) + "ping";
            System.Threading.Thread.Sleep(100);
            Application.DoEvents();
        }
        for (int i = 11; i >= 0; i--) {
            label1.Text = new String(' ', i) + "pong";
            System.Threading.Thread.Sleep(100);
            Application.DoEvents();
        }
    }
}

请注意，此解决方案是不完美，作为表单会无法正常关闭。你将不得不中止程序。使用计时器的解决方案将工作顺畅和形式将表现为预期关闭的时候，然而，这是一个简单明了的解决方案。

Note, this solution is not perfect, as the form will not close properly. You will have to abort the program. A solution using a timer will work smoother and the form will behave as expected when closing, however this is a straightforward and simple solution.

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