Question

.NET 4.5.2，设置了以下路由信息：

public void Configuration( IAppBuilder appBuilder )
{
    var conf = new HttpConfiguration();
    conf.Routes.MapHttpRoute(
        name: "DefaultApi" ,
        routeTemplate: "service/2014/{controller}/{appKey}" , 
        defaults: new { appKey = RouteParameter.Optional }
    );
    appBuilder.UseWebApi( conf );
}

使用以下控制器代码：

public HttpResponseMessage Get( string appKey , string qs1 , string qs2 )
{
    var remess = new HttpResponseMessage { RequestMessage = Request , StatusCode = HttpStatusCode.OK };
    if ( true == new BusinessClass().ValueCheck( appKey , qs1 , qs2 ) )
    {
        remess.Content =  new StringContent( "1" , Encoding.UTF8 , "text/plain");
    }
    else
    {
        remess.Content =  new StringContent( "0" , Encoding.UTF8 , "text/plain");
    }
    return remess;
}

如果我使用此URI，它会正确返回＆＃34; 0＆＃34;或者＆＃34; 1＆＃34;基于业务逻辑：

http://localhost:963/service/2014/foo/appgo1?qs1=a&qs2=b

如果我使用此URI（不包括查询字符串值）：

http://localhost:963/service/2014/foo/appgo1

我得到一个框架控制的消息：

<Error> <Message> No HTTP resource was found that matches the request
URI 'http://localhoost:963/service/2014/foo/appgo1'.
</Message> <MessageDetail> No action was found on the controller
'foo' that matches the request. </MessageDetail> </Error>

仅对于此控制器，我想捕获查询字符串参数错误并返回-1的事实。还有另一个控制器根本不接受查询字符串参数。任何人都可以引导我朝着正确的方向前进吗？

感谢。

Answer 1

虽然这确实有效，但这不是最优雅的解决方案：

    public HttpResponseMessage Get(string appKey, string qs1 = null, string qs2 = null)
    {

        var remess = new HttpResponseMessage { RequestMessage = Request, StatusCode = HttpStatusCode.OK };

        if (qs1 == null || qs2 == null)
        {
            remess.Content = new StringContent("-1", Encoding.UTF8, "text/plain");
        }
        else if ( true == new BusinessClass().ValueCheck( appKey , qs1 , qs2 ) )
        {
            remess.Content = new StringContent("1", Encoding.UTF8, "text/plain");
        }
        else
        {
            remess.Content = new StringContent("0", Encoding.UTF8, "text/plain");
        }
        return remess;

    }

您基本上使查询字符串params可选，然后检查是否为null以返回您的-1代码。否则，请进行业务逻辑检查。

您还可以使用默认的GET操作来捕获所有到控制器的内容并在那里返回-1。

ASP.Net Web API返回异常的特定错误数据？

1 个答案: