CODEWITHSUNDEEP
c#asp.netasp.net-web-apiattributerouting
Dan
Dan

Reputation: 1571

ASP.net WebApi Multiple controller types were found that match the URL

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

Upvotes: 2

Views: 3464

Answers (1)

Dan
Dan

Reputation: 1571

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}/" )]

Upvotes: 4

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