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c#.netxmliis-expresswebapi

IIS express error500.24 web API

I migrate an dotnet framework web api application from vs 2010 to 2019. I want to use IIS express for developpement mode debug. My application is built with a api back in dotnet framework 4.5 using XML and not JSON and a front in dotnet winform.

error API rest

message html front

error front

Sorry for the French messages.

I tried to change the web.config, the applicationhost.config (in the user IIS express directory and the .VS\config directory. add modules to IIS manager

IIS config

Solution

  • thanks for your help I have tried validateIntegratedModeConfiguration="false"

    and it worked only when I deleted the lines created in the applicationhost.config (but it's not a solution) we finally found: the problem was that I modified the .csproj file; but the file used for the user configuration is the .csproj.user. It is modified with the "property" tab of VS. I had seen it in a post for an mvc web application, since we are using an api, I thought it was different because it is an api..... My colleague showed me the options in the panel... and now it works!!!!

    [configuration]You have to modify in properties : anonymous authentication : disable windows authentication : enable pipiline mode : classic and that's all