XAML 文件的编译 (WPF)
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Compilation of XAML files (WPF)
提问by canahari
I would like to understand the compilation process of XAML files. Sorry for putting this question here but I really did not find any resource explaining this process in-depth.
我想了解XAML文件的编译过程。很抱歉把这个问题放在这里，但我真的没有找到任何深入解释这个过程的资源。
I understand that XAML is compiled into a .baml file. But: Is the .baml compiled from the generated .g.cs file? Or is the .baml independent and is the IL code generated from the generated .g.cs AND the original .xaml.cs file - this would explain why MainWindow is partial. Which parts of the XAML declarations go into the BAML file? I would like to know also when the loading of a .baml file takes place (for example when talking about a window). Thanks for the help.
我知道 XAML 被编译成一个 .baml 文件。但是： .baml 是从生成的 .g.cs 文件编译的吗？或者 .baml 是独立的，并且是从生成的 .g.cs 和原始 .xaml.cs 文件生成的 IL 代码 - 这将解释为什么 MainWindow 是部分的。XAML 声明的哪些部分会进入 BAML 文件？我还想知道何时加载 .baml 文件（例如在谈论窗口时）。谢谢您的帮助。
采纳答案by har07
In my understanding based on the reference below, everything declared in XAML gets compiled to BAML; .g.csand .xaml.csfiles compiled to IL; .xaml.csIL generated from codes in .xaml.csfile (obviously), and g.csIL contains codes generated to interact with BAML (instead of IL codes generated from BAML it self).
根据我基于以下参考资料的理解，在 XAML 中声明的所有内容都被编译为 BAML；.g.cs和.xaml.cs编译为 IL 的文件；.xaml.cs从.xaml.cs文件g.cs中的代码生成的 IL （显然），并且IL 包含生成的与 BAML 交互的代码（而不是从 BAML 生成的 IL 代码它自己）。
Check this blog postfor reference. To summarize, the author said that compilation of XAML happened in 2 steps :
检查此博客文章以供参考。总结一下，作者说XAML的编译分两步：
Step 1. The first step is to compile the XAML files into BAML using the xamlc.exe compiler. For example, if our project includes a file name Window1.xaml, the compiler will create a temporary file named Window1.baml and place it in the obj\Debug subfolder (in our project folder). At the same time, a partial class is created for our window, using the language of our choice. For example, if we're using C#, the compiler will create a file named Window1.g.cs in the obj\Debug folder. The g stands for generated.
The partial class includes three things:
? Fields for all the controls in our window.
? Code that loads the BAML from the assembly, thereby creating the tree of objects. This happens when the constructor calls Initialize Component ().
? Code that assigns the appropriate control object to each field and connects all the event handlers. This happens in a method named Connect (), which the BAML parser calls every time it finds a named object.
Step 2. When the XAML-to-BAML compilation stage is finished, Visual Studio uses the appropriate language compiler to compile our code and the generated partial class files. In the case of a C# application, it's the csc.exe compiler that handles this task. The compiled code becomes a single assembly Window1.exe) and the BAML for each window is embedded as a separate resource.
第 1 步。第一步是使用 xamlc.exe 编译器将 XAML 文件编译为 BAML。例如，如果我们的项目包含一个名为 Window1.xaml 的文件，编译器将创建一个名为 Window1.baml 的临时文件并将其放置在 obj\Debug 子文件夹中（在我们的项目文件夹中）。同时，使用我们选择的语言为我们的窗口创建了一个部分类。例如，如果我们使用 C#，编译器将在 obj\Debug 文件夹中创建一个名为 Window1.g.cs 的文件。g 代表生成。
分部类包括三件事：
? 我们窗口中所有控件的字段。
? 从程序集中加载 BAML 的代码，从而创建对象树。这发生在构造函数调用 Initialize Component() 时。
? 将适当的控制对象分配给每个字段并连接所有事件处理程序的代码。这发生在名为 Connect() 的方法中，BAML 解析器每次找到命名对象时都会调用该方法。
第 2 步。当 XAML 到 BAML 编译阶段完成时，Visual Studio 使用适当的语言编译器来编译我们的代码和生成的部分类文件。对于 C# 应用程序，它是处理此任务的 csc.exe 编译器。编译后的代码成为单个程序集 Window1.exe)，并且每个窗口的 BAML 作为单独的资源嵌入。
