.net - 检查 URL 是否存在不起作用

Question

我有一个应该检查url是否存在的函数。

Function URLExists(URL As String) As Boolean
Dim HttpWebRequest_ As HttpWebRequest = WebRequest.Create(URL)
HttpWebRequest_.Method="HEAD" 'It doesn't work even without this.
Dim HttpWebResponse_ As HttpWebResponse = HttpWebRequest_.GetResponse()
Return HttpWebResponse_.StatusCode = HttpStatusCode.OK
End Function

如果我尝试 URLExists(" http://www.google.com/thisPageDoesNotExistAndIsRetarded.html ")，它返回 True，如果我尝试 URLExists(" https://www.google.com/ ")，（显然存在)，它返回 True，（正确）。谢谢。

Answer 1

我不熟悉VB，但我写了一些c#：

string url = "http://www.google.com/thisPageDoesNotExistAndIsRetarded.html";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "HEAD";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

并且[System.Net.WebException]在运行时在GetResponse(). 这是工作。

也许您可以尝试try{ } catch{ return false}在您的方法中添加一个。