你能禁用网络异常吗？

Question

我想知道您是否可以禁用Web异常，例如，

404未找到

Answer 1

你不能禁用WebExceptions。与大多数其他例外一样，它们的全部目的是发出一个问题在发生时无法解决的信号。你不能忽视这一点，指望你的应用程序能正常工作。

您所做的就是捕捉并处理异常。就像这样。

Try
    Dim response = request.GetResponse()

    '... do stuff with response here ...

Catch ex as WebException
    ' Note, `response` probably isn't usable here!  Pretty sure it's
    ' out of scope.  In any case, if `GetResponse` is throwing the
    ' exception, then it didn't return a value.  However, you should be
    ' able to access `ex.Response` to get info about the response,
    ' including the HTTP response code.
    Dim errorResponse = CType(ex.Response, HttpWebResponse)
    If errorResponse.StatusCode = HttpStatusCode.NotFound Then

        '... handle error ...

    Else
        ' if it's not a 404, we're not doing anything about the exception
        ' so rethrow it
        Throw
    End If
End Try

' Note, `response` is out of scope here!

Answer 2

这必须在IIS中完成。

为此，导航以启动->控制面板->管理工具-> IIS

在列表中选择web服务器，然后双击错误页选项。

为要替换或删除的错误消息添加特定网页。

如果您需要更多的细节，下面是一个很好的介绍：http://www.braintrove.com/id/46