C#:无法调试ASHX处理程序 [英] C#: Can't debug ASHX handler

问题描述

我有一个ASP.net C#4.0网站项目.我正在使用jQuery AJAX回发调用ASHX处理程序.通常，在调试C#时，我会使用Debug> Attach to Process>选择w3wp.exe并开始调试.

I have an ASP.net C# 4.0 website project. I am calling an ASHX handler using a jQuery AJAX postback. Normally when I debug C#, I use this method Debug > Attach to Process > select w3wp.exe and start debugging.

当我使用ASHX处理程序执行此操作时，Visual Studio会说不会命中断点.没有为该文档加载任何符号."果然，当我对处理程序运行AJAX调用时，没有命中断点.

When I do this with my ASHX handler Visual Studio says "The breakpoint will not be hit. No symbols have been loaded for this document." Sure enough, when I run the AJAX call to the handler, the breakpoint is not hit.

让我感到困惑的是，我可以否则调试C#文件，即ASPX文件的代码隐藏.

What confuses me is that I can debug C# files otherwise, i.e. the code-behind of an ASPX file.

推荐答案

事实证明，在Visual Studio尝试运行ASHX处理程序之前，它实际上不会加载用于调试的符号.我的问题竟然出在其他地方-jQuery代码中的一个错误，该错误称为处理程序.

It turns out that Visual Studio will not actually load symbols for debugging until it actually tries to run the ASHX handler. My problem turned out to be elsewhere - a bug in the jQuery code that called the handler.

起初我没有看到这个错误，所以假设处理程序被击中了.调用处理程序后，VS将允许您对其进行调试.我没有意识到ASHX处理程序的行为方式，我认为它们将像常规C#文件一样工作.

I didn't see this bug at first so assumed the handler was being hit. Once the handler is called, VS will then allow you to debug it. I didn't realise that ASHX handlers behaved this way, I thought they would work just like a regular C# file.

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