我有这个ASP.NET MVC 5我正在使用 MS Web Api 将其转换为 AngularJS 的项目。
现在在旧项目中我有这些类型的 c# 控制器Controller，但是在我的新项目中，我创建了一些新的 Web Api 控制器类型ApiController.
现在我想在我的新项目中重用旧的控制器代码。我的困惑就在这里。
当我尝试将旧控制器代码移植到我的 Web Api 控制器时，我得到了一些前端$http请求错误。
这是我的 Angular 的一个函数dataService工厂将 http 请求降低到'api/Whatif/SummaryPortfolios':
function getCurrPortfoliosLIst() {
var deferred = $q.defer();
var url = 'api/Whatif/SummaryPortfolios';
var req={
method: 'POST',
url: url,
headers: {
'Content-Type': 'application/json',
},
data:{}
};
$http(req).then(function (resp){
deferred.resolve(resp.data);
}, function(err){
console.log('Error from dataService: ' + resp);
});
}
But the $http错误部分返回此异常：
data: Object
ExceptionMessage: "Multiple actions were found that match the request:
↵SummaryPortfolios on type MarginWorkbenchNG.Controllers.WhatifController
↵Post on type MarginWorkbenchNG.Controllers.WhatifController"
ExceptionType: "System.InvalidOperationException"
Message: "An error has occurred."
StackTrace: " at System.Web.Http.Controllers.ApiControllerActionSelector.ActionSelectorCacheItem.SelectAction(HttpControllerContext controllerContext)
↵ at System.Web.Http.Controllers.ApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)
↵ at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)
↵ at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()
这是我要调用的 C# API 控制器，但我需要弄清楚如何创建除直接 Get() 和 Post() 方法之外的方法：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web;
using System.Web.Http;
using Microsoft.AspNet.Identity;
using NLog;
using Microsoft.AspNet.Identity.Owin;
using MarginWorkbenchNG.Models;
using Rz.DAL;
using Rz.DAL.Integration;
using Rz.DAL.Models;
using Rz.DAL.Models.Rz;
namespace MarginWorkbenchNG.Controllers
{
public class WhatifController : ApiController
{
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
[HttpPost]
public List<WhatifSummaryViewModel> SummaryPortfolios(string filterValue = "", int? whatIfBatchNumber = null, bool includeBaseline = true)
{
// Get portfolios from Rz
IEnumerable<Portfolio> portfolios = GetPortfolios(filterValue, whatIfBatchNumber, includeBaseline)
.Where(x => x.PortfolioKeys.Any(k => k.Type == Settings.Whatif.SidebarPortfolioKey && k.DisplayValue == filterValue));
// View Model
List<WhatifSummaryViewModel> model = new List<WhatifSummaryViewModel> { };
/// additional code here...
return model;
}
}
}
旧的控制器（来自 MVC5 项目）当然看起来略有不同，因为_Summary方法是类型ActionResult并返回一个Partial:
public class WhatifController : Controller
{
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult _Summary(string filterValue = "", int? whatIfBatchNumber = null, bool includeBaseline = true)
{
// Get portfolios from Razor
IEnumerable<Portfolio> portfolios = GetPortfolios(filterValue, whatIfBatchNumber, includeBaseline)
.Where(x => x.PortfolioKeys.Any(k => k.Type == Settings.Whatif.SidebarPortfolioKey && k.DisplayValue == filterValue));
// View Model
List<WhatifSummaryViewModel> model = new List<WhatifSummaryViewModel> { };
// additional code removed for brevity...
return PartialView(model.OrderBy(x => x.Title).ThenBy(x => x.SubTitle));
}
My RouteConfig.cs :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
namespace MarginWorkbenchNG
{
public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
}
}
老项目也是使用Html形式来拉取URL，例如：
<form id="whatif-summary-form" action="@Url.Action("_Summary", "WhatIf")" method="POST"></form>
然后拉actionattrib 在 JavaScript（非 Angular）中构建 ajax 请求时获取 URL：
url: form.prop("action")
这是你的整个 ApiController 吗？您收到的错误消息是因为您的 ApiController 有多个相同类型的方法，并且它无法判断要路由到哪一个。要测试这一点：注释掉除您正在调用的方法之外的所有控制器方法。您不应该再收到该错误。
这是一个简单的修复，只需告诉 web api 如何映射您的路线即可。将属性“[Route("yourroute')]”添加到您的方法中，它应该可以工作。
public class WhatifController : ApiController
{
[HttpPost, Route("Your Route Goes here 'SummaryPortfolios'")]
public IHttpActionResult SummaryPortfolios(string filterValue = "", int? whatIfBatchNumber = null, bool includeBaseline = true)
{
// Get portfolios from Rz
IEnumerable<Portfolio> portfolios = GetPortfolios(filterValue, whatIfBatchNumber, includeBaseline)
.Where(x => x.PortfolioKeys.Any(k => k.Type == Settings.Whatif.SidebarPortfolioKey && k.DisplayValue == filterValue));
// View Model
List<WhatifSummaryViewModel> model = new List<WhatifSummaryViewModel> { };
/// additional code here...
return Ok(model);
}
}
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