问题
I have added a new HttpPost route "api/export/error/" to my WebApi, using Attribute Routing, and I am getting an error:
Multiple controller types were found that match the URL. This can happen if attribute routes on multiple controllers match the requested URL.\r\n\r\nThe request has found the following matching controller types: \r\nMyApp.Controllers.ExportErrorController\r\nMyApp.Controllers.ExportGeneratorController
But I do not have the same routes in different controllers that i see; here are the only routes in those two controllers:
ExportErrorController.cs
[HttpGet]
[Route( "api/export/error/total/" )]
[HttpGet]
[Route( "api/export/error/channel/{channelId}/" )]
[HttpPost]
[Route( "api/export/error/" )]
[HttpDelete]
[Route( "api/export/error/{id}/" )]
[HttpPut]
[Route( "api/export/error/clear/" )]
ExportGeneratorController.cs
[HttpGet]
[Route( "api/2/export/{channelId}/" )]
[HttpPost]
[Route( "api/2/export/generate-word/{debugInfo}/" )]
[HttpPost]
[Route( "api/2/export/generate-excel/{debugInfo}/" )]
I cannot see any places that have the same between the two controllers
回答1:
Apparently ASP.Net does not evaluate parameter 'types' OR methods when determining the route to use so it found and matched the route text "error" as a potential parameter for 'channelid' even though they were different methods.
Adding a type to the parameter helped it resolve it properly so:
[Route( "api/2/export/{channelId}/" )]
Is fixed by changing it to:
[Route( "api/2/export/{channelId:int}/" )]
来源：https://stackoverflow.com/questions/36621459/asp-net-webapi-multiple-controller-types-were-found-that-match-the-url