WPF 应用程序的入口点是什么? [英] What is the entry point of a WPF application?

问题描述

Main 方法是 C# 控制台应用程序的入口点.因此，例如，如果我必须启动一些线程或服务，我将在 Main 方法中进行.

The Main method is the entry point of a C# console application. Thus, for example, if I have to start some threads or services, I will do it within the Main method.

我在 WPF 项目中没有看到 Main 方法，那么 WPF 应用程序的入口点是什么?如果必须启动一些线程或服务，启动它们的代码应该写在哪里?

I do not see the Main method inside a WPF project, so what is the entry point of a WPF application? If I have to start some threads or services, where should write the code for starting them?

更新: 这个答案总结了可用的解决方案，但有什么优点和缺点每个解决方案?

UPDATE: this answer summarizes the available solutions, but what are the pros and cons of each solution?

推荐答案

您的主要入口点是 App.Xaml 代码隐藏中 OnStartup 的覆盖:

Your main entry point is an override of OnStartup in the code-behind of App.Xaml :

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        // here you take control
    }
}

其他有趣的点可能是 Application.OnActivate() 以及 MainWindow 的 Loaded 和 Initialized 事件.

Other points of interest might be Application.OnActivate() and the Loaded and Initialized events of your MainWindow.

如果我必须启动一些线程或服务，应该在哪里编写启动它们的代码?

If I have to start some threads or services, where should write the code for starting them?

取决于这些线程/服务需要和想要什么.

Depends on what those threads/services need and want.

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