Web API 控制器中具有相同参数的多个 HttpPost 操作

Question

我正在使用 ASP.NET Web Api 和 angularJs 开发 Web 应用程序。我有一个这样的网络 api 控制器：

[ActionName("AddNewState")]
public object PostAddNewState(RegionInformation newStateParam)
{
    RegionOperations regionOperation = new RegionOperations(newStateParam.StateName);
    RegionInformation newStateInformation = regionOperation.NewStateInformation;
    var text = new
    {
        newStateInformation
    };
    return JsonConvert.SerializeObject(text);
}

[ActionName("AddNewCity")]
public object PostAddNewCity(RegionInformation newCityParam)
{
    var text = new
    {
        message="Hello"
    };
    return JsonConvert.SerializeObject(text);
}

在客户端我有发送POST请求的这些功能：

$scope.AddNewState = function () {
    $http({
        method: "POST",
        url: "api/RegionManagement/AddNewState",
        data: {
            StateName: $scope.state
        }
    }).then(function (response) {
        var obj = JSON.parse(response.data);
        $scope.States.push({ text: obj.newStateInformation.StateName, value: obj.newStateInformation.ID });
    });
};

$scope.AddNewCity = function () {
    $http({
        method: "POST",
        url: "api/RegionManagement/AddNewCity",
        data: {
            ParentID: $scope.RegionInptes.ParentID,
            CityName: $scope.city
        }
    }).then(function (response) {
        var obj = JSON.parse(response.data);
        alert(obj.message);
    });
};

当我执行 $scope.AddNewCity 或 $scope.AddNewState 我面对 500内部服务器错误。如果我在 web api 控制器中评论 AddNewCity 操作，那么我可以执行 $scope.AddNewState 成功。

我搜索了在网络 api 控制器中使用多个 HTTPPost 并尝试了这个解决方案：，但没有任何反应，我仍然遇到该错误。

更新

这是我的配置文件：

public static void Register(HttpConfiguration config)
{
    // Web API configuration and services

    // Web API routes
    config.MapHttpAttributeRoutes();

    config.Routes.MapHttpRoute(
        name: "ControllerOnly",
        routeTemplate: "api/{controller}"
    );

    config.Routes.MapHttpRoute(
        name: "ControllerandId",
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );
    config.Routes.MapHttpRoute(
        name: "ControllerAndAction",
        routeTemplate: "api/{controller}/{action}"
        );
}

Answer 1

可能是因为请求中的参数数量url

[ActionName("AddNewState")]
public object PostAddNewState(RegionInformation newStateParam)
{
    RegionOperations regionOperation = new RegionOperations(newStateParam.StateName);
    RegionInformation newStateInformation = regionOperation.NewStateInformation;
    var text = new
    {
        newStateInformation
    };
    return JsonConvert.SerializeObject(text);
}

[ActionName("AddNewCity")]
public object PostAddNewCity(RegionInformation newCityParam)
{

    RegionOperations regionOperation = new RegionOperations(newCityParam.ParentID, newCityParam.CityName);
    RegionInformation newStateInformation = regionOperation.NewStateInformation;
    var text = new
    {
        newStateInformation
    };
    return JsonConvert.SerializeObject(text);
}

Answer 2

注册路线的顺序很重要。先注册更具体的路由，再注册更通用的路由。

public static void Register(HttpConfiguration config) {
    // Web API configuration and services

    // Web API routes
    config.MapHttpAttributeRoutes();

    config.Routes.MapHttpRoute(
        name: "ControllerAndAction",
        routeTemplate: "api/{controller}/{action}/{id}"
        defaults: new { id = RouteParameter.Optional }
    );

    config.Routes.MapHttpRoute(
        name: "ControllerandId",
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );

}

您还应该更新控制器，使其更具体地说明它可以处理什么。

public class RegionManagementController : ApiController {
    [HttpPost]
    [ActionName("AddNewState")]
    public object PostAddNewState(RegionInformation newStateParam) { ... }

    [HttpPost]
    [ActionName("AddNewCity")]
    public object PostAddNewCity(RegionInformation newCityParam) { ... }
}

Web API 控制器中具有相同参数的多个 HttpPost 操作

Multiple HttpPost action with the same parameter in Web API Controller

c#

asp.net

asp.net-web-api

angularjs

asp.net-web-api-routing