Question

我在我当前的项目中使用t4mvc并尝试使用包含的路由助手，但是当我尝试使用下面的自定义约束时

     routes.MapRoute(
        "def_filtered_reports_route",
        "reports/{samplePoint}/{fromDate}/{toDate}",
        MVC.Report.Results(null, null, null),
        new
        {
            samplePoint = new SamplePointExistsConstraint(),
            fromDate = new DateTimeConstraint(),
            toDate = new DateTimeConstraint()
        }
        );

它会引发ArgumentException陈述An item with the same key has already been added.

如果我这样写的话

 routes.MapRoute(
    "def_filtered_reports_route",
    "reports/{samplePoint}/{fromDate}/{toDate}",
    MVC.Report.Results(null, null, null) );

或者像这样

    routes.MapRoute(
           "def_filtered_reports_route",
           "reports/{samplePoint}/{fromDate}/{toDate}",
           new
           {
               controller = "Report",
               action = "Results",
               fromDate = "",
               toDate = "",
               samplePoint = ""
           },
           new
           {
               fromDate = new DateTimeConstraint(),
               toDate = new DateTimeConstraint(),
               samplePoint = new SamplePointExistsConstraint()
           });

它工作正常。

是否有我遗漏的内容或t4mvc不支持自定义约束

Answer 1

尝试在约束之前为默认值传递额外的null。 e.g。

        routes.MapRoute(
           "def_filtered_reports_route",
           "reports/{samplePoint}/{fromDate}/{toDate}",
           MVC.Report.Results(null, null, null),
           null /*defaults*/,
           new {
               samplePoint = new SamplePointExistsConstraint(),
               fromDate = new DateTimeConstraint(),
               toDate = new DateTimeConstraint()
           }
           );

如何使用自定义路由约束的t4mvc路由助手

1 个答案: