How do I resolve the issue the request matched multiple endpoints in .Net Core Web Api

Question

I notice that there are a bunch of similar questions out there about this topic.

I\'m getting this error when calling any of the methods below.

Answer 1

Action routes need to be unique to avoid route conflicts.

If willing to change the URL consider including the userId in the route

// api/menus/{menuId}/menuitems
[HttpGet("{menuId:int}/menuitems")]
public IActionResult GetAllMenuItemsByMenuId(int menuId)  
    //....
}

// api/menus/{menuId}/menuitems/{userId}
[HttpGet("{menuId:int}/menuitems/{userId:int}")]
public IActionResult GetMenuItemsByMenuAndUser(int menuId, int userId) {
    //...
}

##Reference Routing to controller actions in ASP.NET Core

##Reference Routing in ASP.NET Core