Question

我使用MVC5有这样的东西：

Namespace Controllers
Public Class WorkflowsController Inherits ApiController

    <HttpPost>
    <ActionName("SaveComment")>
    Public Function PostComment(id As String, Optional comment As String = "")
        Try
            Dim status As ApiResponse = SomeClass.AddComment(id, comment)

            Return Me.Json(status)
        Catch ex As Exception
            Return Me.Json(New ApiResponse With {.ErrorMessage = ex.Message})
        End Try
    End Function    
End Class
End Namespace

它工作正常，正如您所看到的，它在正常和错误条件下都将json对象返回给浏览器。在异常的情况下，如何将响应代码设置为500以及将ErrorMessage作为json对象返回？

Answer 1

您可以在返回HttpStatusCodeResult之前执行JsonResult：

    Try
        Dim status As ApiResponse = SomeClass.AddComment(id, comment)

        Return Me.Json(status)
    Catch ex As Exception
        (New HttpStatusCodeResult(500)).ExecuteResult(ControllerContext)
        Return Me.Json(New ApiResponse With {.ErrorMessage = ex.Message})
    End Try

在返回json的MVC5 ApiController中设置响应代码

1 个答案: