在整个 Windows 窗体应用程序生命周期中仅运行一次窗体 [英] Running a form for only once in entire Windows form application lifetime

问题描述

在我的项目中，当用户第一次安装我的软件时，我想显示一个用户指南.所以，只有一次，我想(在开始时)显示一个窗口，其中给出了一些方向以便用户第一时间了解如何使用我的软件.用户观看该窗口(用户指南)后，该窗口将不会再出现.我想使用像 userguid.cs 这样的表单.这将在我的应用程序生命周期中显示在主窗口的请求中.N:B:例如，如果用户重新启动计算机并再次运行该应用程序，它将不会像以前那样再次显示用户指南窗口我怎样才能做到这一点??谁能告诉我该怎么做???

In my project i want to show a user-guide when the user first installs my software.So, for only one time i want to show (at beginning) a window where some direction is given so that a user can understand in first time how to use my software.After the user once watches the window(user guide) this window will not appear further time. I want to use a form like userguid.cs. this will show in the begging of the mainwindow for one time in the life of the my application. N:B: For example if user restart his computer and again run the app it will not show the userguide window again as it shows before How can i do that?? Can anyone give idea how can i do that???

推荐答案

只需维护一个标志，它可以帮助您存储用户指南是否已显示.

Simply maintain a flag, which will help you store, whether the user guide has been displayed or not.

标志可以是一个文件，它存储在你的应用程序目录中，或者如果你有一个数据库，你可以将布尔值存储在一个数据库中.

The flag can be a file, which is stored in your application directory, or if you have a database, you can store the boolean value in a db.

然后调用该函数以在表单加载时或您需要的任何地方显示用户指南.

Then call the function to display the user guide, when the form loads, or wherever you require.

public void Form1_Load() {
   displayUserGuide();
}

并且，在函数 displayUserGuide 中查看是否设置了标志.

And, in the function displayUserGuide see whether flag has been set or not.

public void displayUserGuide() {
  //Return, if the form has already been displayed.
  if(File.Exists("UGUID")) return;
  userGuide.Show();
  File.Create("UGUID");
}

您可以在整个应用程序中的任何位置简单地调用函数displayUserGuide().该函数将确保表单只显示一次.

You can simply call the functiondisplayUserGuide() any where you want throughout the Application. The function will make sure the form is displayed only once.

这样您就可以显示一次 Windows 窗体应用程序.

In this way you can display Windows form application once.

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