vb.net - 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

您没有禁用 WebExceptions。像大多数其他例外一样，它们的全部意义在于表明一个在发生时无法修复的问题。您不能忽略这一点并期望您的应用程序能够正常工作。

您所做的是捕获并处理异常。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，导航至开始 -> 控制面板 -> 管理工具 -> IIS

在列表中选择您的 Web 服务器并双击错误页面选项

为您尝试替换或删除的错误消息添加特定网页。

如果您需要更多详细信息，这是一个很好的演练：http ://www.braintrove.com/id/46