APP
約束的作用是 只有大寫的參數值才能通過
?
一、定義約束
二、加載的時候引入約束
三、在controller 引入約束
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Web;
using System.Web.Http.Routing;
namespace WebApi
{
public class UpperCaseRouteConstraint : IHttpRouteConstraint
{
bool IHttpRouteConstraint.Match(HttpRequestMessage request, IHttpRoute route, string parameterName, IDictionary<string, object> values, HttpRouteDirection routeDirection)
{
// parameterName的意思是約束的參數名稱 這里是 invalue
// values 集合 包含參數名稱，比如 invalue 的值。
object casevalue;
if(values.TryGetValue(parameterName, out casevalue))// 這里獲取 invalue 的值
{
return casevalue.ToString().ToUpper() == casevalue.ToString();
}
return false;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.Routing;
namespace WebApi
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
// Web API routes
DefaultInlineConstraintResolver constraintResolver = new DefaultInlineConstraintResolver();
constraintResolver.ConstraintMap.Add("UpperCase", typeof(UpperCaseRouteConstraint));
config.MapHttpAttributeRoutes(constraintResolver);
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading;
using System.Web.Http;
using WebApi.Properties;
namespace WebApi.Controllers
{
public class ResourcesController : ApiController
{
[HttpGet]
[Route("api/constrant/{invalue:UpperCase=TTT}")]
public string GetValue(string invalue)
{
return invalue;
}
}
}
?
?獲得定義一個新的 約束解析類
?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http.Routing;
namespace WebApi
{
public class ExtendDefaultInlineConstraintResolver: DefaultInlineConstraintResolver
{
public ExtendDefaultInlineConstraintResolver()
{
this.ConstraintMap.Add("UpperCase", typeof(UpperCaseRouteConstraint));
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Http.Routing;
namespace WebApi
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
// Web API routes
//DefaultInlineConstraintResolver constraintResolver = new DefaultInlineConstraintResolver();
//constraintResolver.ConstraintMap.Add("UpperCase", typeof(UpperCaseRouteConstraint));
ExtendDefaultInlineConstraintResolver constraintResolver = new ExtendDefaultInlineConstraintResolver();
config.MapHttpAttributeRoutes(constraintResolver);
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}
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本文摘自 ：https://www.cnblogs.com/
