以前工作的asp.net webforms应用程序现在抛出这个错误:
系统。MissingMethodException:方法未找到
DoThis方法在同一个类上，它应该可以工作。
我有一个通用的处理程序，这样:
public class MyHandler: IHttpHandler
{
public void Processrequest(HttpContext context)
{
// throws error now System.MissingMethodException:
// Method not found.
this.DoThis();
}
public void DoThis(){ ... }
}
当前回答
I had a similar scenario where I was getting this same exception being thrown. I had two projects in my web application solution, named, for sake of example, DAL and DAL.CustSpec. The DAL project had a method named Method1, but DAL.CustSpec did not. My main project had a reference to the DAL project and also a reference to another project named AnotherProj. My main project made a call to Method1. The AnotherProj project had a reference to the DAL.CustSpec project, and not the DAL project. The Build configuration had both the DAL and DAL.CustSpec projects configured to be built. After everything was built, my web application project had the AnotherProj and DAL assemblies in its Bin folder. However, when I ran the website, the Temporary ASP.NET folder for the website had the DAL.CustSpec assembly in its files and not the DAL assembly, for some reason. Of course, when I ran the part that called Method1, I received a "Method not found" error.
为了修复这个错误，我必须从DAL更改AnotherProj项目中的引用。CustSpec到只是DAL，删除了临时ASP中的所有文件。NET Files文件夹，然后重新运行网站。从那以后，一切都开始运转了。我还确保了DAL。在“生成配置”中取消选中CustSpec项目后，没有生成该项目。
我想我要分享这个，也许它能在未来帮助到其他人。
其他回答
I had a similar scenario where I was getting this same exception being thrown. I had two projects in my web application solution, named, for sake of example, DAL and DAL.CustSpec. The DAL project had a method named Method1, but DAL.CustSpec did not. My main project had a reference to the DAL project and also a reference to another project named AnotherProj. My main project made a call to Method1. The AnotherProj project had a reference to the DAL.CustSpec project, and not the DAL project. The Build configuration had both the DAL and DAL.CustSpec projects configured to be built. After everything was built, my web application project had the AnotherProj and DAL assemblies in its Bin folder. However, when I ran the website, the Temporary ASP.NET folder for the website had the DAL.CustSpec assembly in its files and not the DAL assembly, for some reason. Of course, when I ran the part that called Method1, I received a "Method not found" error.
为了修复这个错误，我必须从DAL更改AnotherProj项目中的引用。CustSpec到只是DAL，删除了临时ASP中的所有文件。NET Files文件夹，然后重新运行网站。从那以后，一切都开始运转了。我还确保了DAL。在“生成配置”中取消选中CustSpec项目后，没有生成该项目。
我想我要分享这个，也许它能在未来帮助到其他人。
可能的情况是
不匹配的nuget组件版本
问题详解
我们有一个解决方案生成了多个nuget包。
packageA 1.0中的类A
packageB 1.0中的B类
A参考B
所以当A和B都有更新时，我们必须更新packageA和packagb，但问题是我的团队成员之一没有更新packagb
现在PackageA 1.1仍然依赖于PackageB 1.0，但PackageB没有B类的更新版本
因此，它无法找到方法
解决方案
移动两个包到+1版本 在这种情况下，我移动了
PackageA 1.1 -> PackageA 1.2 .
包装0 . 1.1
但为了使事情更加对称，可以将两者移动到相同的版本
PackageA 1.1 -> PackageA 1.2 .
PackageB 1.0 -> PackageB 1.2
在我的案例中，这是一个复制/粘贴的问题。我以某种方式结束了我的映射配置文件的PRIVATE构造函数:
using AutoMapper;
namespace Your.Namespace
{
public class MappingProfile : Profile
{
MappingProfile()
{
CreateMap<Animal, AnimalDto>();
}
}
}
(注意演员面前少了一个“公众”)
它编译得非常好，但是当AutoMapper尝试实例化概要文件时，它不能(当然!)找到构造函数!
你试过把它关掉再打开吗?玩笑归玩笑，重启电脑才是真正让我成功的方法，其他答案中都没有提到。
在我的案例中，spotify.exe使用的端口与我的web api项目想要在开发机器上使用的端口相同。端口号为4381。
我退出了Spotify，一切又恢复正常了:)
