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POMVC 3 Route resolution question
 

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  1. POMVC 3 Route resolution question
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    <p>I have the following 3 routes</p> <ul> <li>student/available/classes/{id}</li> <li>student/available/classes/{studentId}/{classTypeId}</li> <li>student/available/classes/query/{q}</li> </ul> <p>This is how I register the routes in my global.asax.cs file</p> <pre><code>//Student Checkin routes.MapRoute("StudentAvailableClasses_GetAllForStudent", "student/available/classes/{id}", new {controller = "StudentCheckin", action = "GetById"}); routes.MapRoute("StudentAvailableClasses_GetClassForStudent", "student/available/classes/{studentId}/{classTypeId}", new { controller = "StudentCheckin", action = "GetByStudentAndClassType" }); routes.MapRoute("StudentAvailableClasses_Query", "student/available/classes/query/{q}", new { controller = "StudentCheckin", action = "Query" }); </code></pre> <p>When I execute this url</p> <blockquote> <p>student/available/classes/query/smith+john</p> </blockquote> <p>MVC tries to run this route: </p> <blockquote> <p>student/available/classes/{studentId}/{classTypeId}</p> </blockquote> <p>If I reverse the order in which I register the Query route with the GetClassForStudent route, MVC resolves to the query route. </p> <p>What is going on here, and how can I register these routes with MVC so that they all resolve correctly?</p> <p><strong>UPDATE</strong></p> <p>Wow, once again thank you to everyone here on stackoverflow! Based on everyone's responses, and in particular the answer by Beno, I now understand my issue, and was able to make it work! </p> <p>From what I understand, I was not giving MVC enough information about the routes. It was matching the word 'query' into the {studentId} parameter. From Beno's answer I learned about parameter constraints. So now I am able to tell MVC to expect a Guid type in the {studentId} (and {customerId}) parameter.</p> <p>Here is the code now.</p> <pre><code> //Student Checkin routes.MapRoute("StudentAvailableClasses_GetAllForStudent", "student/available/classes/{id}", new {controller = "StudentCheckin", action = "GetById"}, new {id = new GuidConstraint()}); routes.MapRoute("StudentAvailableClasses_GetClassForStudent", "student/available/classes/{studentId}/{classTypeId}", new {controller = "StudentCheckin", action = "GetByStudentAndClassType"}, new {studentId = new GuidConstraint(), classTypeId = new GuidConstraint()}); routes.MapRoute("StudentAvailableClasses_Query", "student/available/classes/query/{q}", new { controller = "StudentCheckin", action = "Query" }); </code></pre> <p>The class <a href="https://stackoverflow.com/questions/2421995/how-can-i-create-a-route-constraint-of-type-system-guid">GuidConstraint I found from this stackoverflow question</a>.</p> <p>Thank you!</p>
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    1. COmake sure your most specific routes are registered first. Then your more generics ones at the end.
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