c# - 找不到方法：发送请求时 web api 控制器

Question

当我尝试调用 api 方法时，我遇到了异常

找不到方法：'无效 System.Web.Http.Filters.HttpActionExecutedContext.set_Response(System.Net.Http.HttpResponseMessage)'。

ApiController：-

[System.Web.Http.HttpGet]
public HttpResponseMessage CheckUserAuthentication(string UserName, string Password)
{
    DomUserAuthentication objauthentication = new DomUserAuthentication();
    var res = Request.CreateResponse(HttpStatusCode.OK);
    /////Code here
    res.Content = new StringContent(json, Encoding.UTF8, "application/json");
    return res;
}

这是我的 Webapi.config：-

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

错误详情：-

<Error>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Method not found: 'Void System.Web.Http.Filters.HttpActionExecutedContext.set_Response(System.Net.Http.HttpResponseMessage)'.
</ExceptionMessage>
<ExceptionType>System.MissingMethodException</ExceptionType>
<StackTrace>
at SalesRevUp.CrossCutting.DataAPIErrors.OnException(HttpActionExecutedContext context) at System.Web.Http.Filters.ExceptionFilterAttribute.System.Web.Http.Filters.IExceptionFilter.ExecuteExceptionFilterAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken) at System.Web.Http.ApiController.<>c__DisplayClass8.<>c__DisplayClassa.<InvokeActionWithExceptionFilters>b__6(IExceptionFilter filter) at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at System.Threading.Tasks.TaskHelpers.IterateImpl(IEnumerator`1 enumerator, CancellationToken cancellationToken)
</StackTrace>
</Error>

标签： c#asp.net-mvcasp.net-mvc-4asp.net-web-apicsharpcodeprovider

Answer 1

As an alternative solution, You can make use of attribute routing https://docs.microsoft.com/en-us/aspnet/web-api/overview/web-api-routing-and-actions/create-a-rest-api-with-attribute-routing

    [Route("IntermediaryData/CheckUserAuthentication")]
    [System.Web.Http.HttpGet]
    public HttpResponseMessage CheckUserAuthentication(string UserName, string Password)
    {
        DomUserAuthentication objauthentication = new DomUserAuthentication();
        var res = Request.CreateResponse(HttpStatusCode.OK);
        /////Code here
        res.Content = new StringContent(json, Encoding.UTF8, "application/json");
        return res;
    }