Web Api 发现多个动作答案

【问题标题】：Web Api Multiple actions were foundWeb Api 发现多个动作
【发布时间】：2015-07-31 08:39:07
【问题描述】：

我有不同类型参数的动作。

public class MyController : ApiController
{       
    [HttpPost]
    public UpdateFeatureResponse UpdateFeature(UpdateFeatureResuest reqResuest)
    {
        return new UpdateFeatureResponse { IsSuccess = true };
    }

    [HttpPost]
    public DeleteFeatureResponse DeleteFeature(DeleteFeatureRequest request)
    {
        return new DeleteFeatureResponse{ IsSuccess = true };
    }

}

而我的请求类型是这样的：

public class UpdateFeatureResuest
{
    public int Id { get; set; }
    public string Feature { get; set; }
}

public class UpdateFeatureResponse
{
    public bool IsSuccess { get; set; }
}

public class DeleteFeatureRequest
{
    public int Id { get; set; }
}

public class DeleteFeatureResponse
{
    public bool IsSuccess { get; set; }
}

路线在这里：

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

当我通过提琴手发送请求 (http://localhost:52285/api/My/UpdateFeature) 时，它返回 HTTP/1.1 500 Internal Server Error

错误信息是：

{"message":"发生错误。","exceptionMessage":"找到与请求匹配的多个操作：\r\nUpdateFeature on type WebGUI.Controllers.MyController\r\nDeleteFeature on type WebGUI.Controllers .MyController","exceptionType":"System.InvalidOperationException","stackTrace":" .....

【问题讨论】：

您使用了什么 URL，您的路由是什么样的？

标签： c# asp.net-mvc asp.net-web-api

【解决方案1】：

您的路线错误，因为它没有指定操作名称，因此它将UpdateFeature 部分视为 ID 参数。改成这样：

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

【讨论】：

我的路由是web api模板的默认路由。但是您的解决方案有效。谢谢

【解决方案2】：

最好使用Route属性。

例如

[RoutePrefix("myapi")]
public class MyController : ApiController
{       
    [Route("update")]
    [HttpPost]
    public UpdateFeatureResponse UpdateFeature(UpdateFeatureResuest reqResuest)
    {
        return new UpdateFeatureResponse { IsSuccess = true };
    }

    [Route("delete")]
    [HttpPost]
    public DeleteFeatureResponse DeleteFeature(DeleteFeatureRequest request)
    {
        return new DeleteFeatureResponse{ IsSuccess = true };
    }

}

现在将其添加到您的 WebApiConfig 之前的 config.Routes.MapHttpRoute()

config.MapHttpAttributeRoutes();

【讨论】：