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c# - Visual Studio Xamarin.Forms 调试：如何进入外部库方法？

问题描述

有时会从 Xamarin.Forms 外部库内部引发异常，并且在调试器中查看相关的局部变量将非常有帮助，就像我们在自己的代码中一样。

这是我当前的 Android iOS 项目头痛的堆栈跟踪：

System.InvalidCastException: Specified cast is not valid.

    at Xamarin.Forms.BindableLayoutController.CreateItemView (System.Object item, Xamarin.Forms.DataTemplate dataTemplate) [0x00003] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:261   

    at Xamarin.Forms.BindableLayoutController.CreateItemView (System.Object item, Xamarin.Forms.Layout`1[T] layout) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:254

    at Xamarin.Forms.BindableLayoutController.CreateChildren () [0x00040] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:234

    at Xamarin.Forms.BindableLayoutController.SetItemTemplate (Xamarin.Forms.DataTemplate itemTemplate) [0x0005a] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:180

    at Xamarin.Forms.BindableLayoutController.set_ItemTemplate (Xamarin.Forms.DataTemplate value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:127

    at Xamarin.Forms.BindableLayout+<>c.<.cctor>b__19_1 (Xamarin.Forms.BindableObject b, System.Object o, System.Object n) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:16

    at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) [0x00120] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:463

    at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x00173] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:397

    at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) [0x00042] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:334

    at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:311

    at Xamarin.Forms.BindableLayout.SetItemTemplate (Xamarin.Forms.BindableObject b, Xamarin.Forms.DataTemplate value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableLayout.cs:45

    at SecretProjectName.Views.YourAmazingClassPage..ctor () [0x0005b] in C:\Users\UserName\source\repos\SecretProjectName\SecretProjectName\SecretProjectName\Views\YourAmazingClassPage.xaml.cs:20

    at (wrapper managed-to-native) System.Reflection.RuntimeConstructorInfo.InternalInvoke(System.Reflection.RuntimeConstructorInfo,object,object[],System.Exception&)

    at System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00005] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:936

除了将 Xamarin.Forms 源代码分叉到我的项目中之外，还有其他方法吗？

标签： c#xamlxamarin.formsvisual-studio-debuggingsourcelink

解决方案

DLL 始终被编译，因此您无法介入。它们的源代码中不包含您（或其他人）的代码，它在编译过程中被修改。

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