当服务器返回错误时，使用WebClient访问响应体的任何方法

本文关键字：响应 访问 方法 任何 WebClient 使用 返回 服务器 错误 | 更新日期: 2023-09-27 18:16:43

使用WebClient类时，是否有办法在响应状态为4xx时访问响应体，例如:

(webClient, evt) => // this is the event handler for the UploadStringCompleted event
    {
        if (evt.Error != null)
        {
            // can I access the response text?
        }
    });

当服务器返回错误时，使用WebClient访问响应体的任何方法

错误是一个webeexception(而不是香草异常)，这是我所做的(请原谅VB.NET):

''' <summary>
''' Extends a WebException to include any body text from the HTTP Response in the .Message
''' </summary>
Friend Function ExtendWebExceptionInfo(ex As Exception) As Exception
    Dim wEx As WebException = TryCast(ex, WebException)
    If wEx Is Nothing Then Return ex
    Dim exMessage As String = Nothing
    Using reader As New StreamReader(wEx.Response.GetResponseStream, System.Text.Encoding.UTF8)
        exMessage = reader.ReadToEnd
    End Using
    If Not String.IsNullOrWhiteSpace(exMessage) Then
        exMessage = String.Format("{0}{1}{1}The server says:{1}{2}", wEx.Message, vbCrLf, exMessage)
        Return New WebException(exMessage, wEx, wEx.Status, wEx.Response)
    End If
    Return wEx
End Function
相关文章：