asp.net-mvc - 如何创建 System.Guid 类型的路由约束？

Question

任何人都可以为我指明如何绘制需要两个向导的路线的正确方向吗？

即。 http://blah.com/somecontroller/someaction/ {firstGuid}/{secondGuid}

其中firstGuid和secondGuid都不是可选的并且必须是system.Guid类型？

Answer 1

创建如下所示的 RouteConstraint:

public class GuidConstraint : IRouteConstraint {

public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
    if (values.ContainsKey(parameterName))
    {
        string stringValue = values[parameterName] as string;

        if (!string.IsNullOrEmpty(stringValue))
        {
            Guid guidValue;

            return Guid.TryParse(stringValue, out guidValue) && (guidValue != Guid.Empty);
        }
    }

    return false;
}}

下一步添加路线:

routes.MapRoute("doubleGuid", "{controller}/{action}/{guid1}/{guid2}", new { controller = "YourController", action = "YourAction" }, new { guid1 = new GuidConstraint(), guid2 = new GuidConstraint() });