我已经设置了该功能在我的web应用发送推送通知到Android设备：

I've set up this function in my web app to send push notifications to Android devices:

Private Function SendNotification(ByVal authstring As String) As String
    Dim request As WebRequest = WebRequest.Create("https://android.apis.google.com/c2dm/send")
    request.Method = "POST"
    request.ContentType = "application/x-www-form-urlencoded"
    request.Headers.Add(String.Format("Authorization: GoogleLogin auth={0}", authstring))
    Dim postData As String = String.Format("registration_id={0}&data.payload={1}&collapse_key=0", deviceList.SelectedValue, txtPayload.Text)
    Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)
    request.ContentLength = byteArray.Length
    Dim dataStream As Stream = request.GetRequestStream()
    dataStream.Write(byteArray, 0, byteArray.Length)
    dataStream.Close()
    Dim response As WebResponse = request.GetResponse()
    dataStream = response.GetResponseStream()
    Dim reader As New StreamReader(dataStream)
    Dim responseFromServer As String = reader.ReadToEnd()
    reader.Close()
    dataStream.Close()
    response.Close()

    Return responseFromServer
End Function

不过，每当我调用这个函数，我得到以下错误信息：根据验证过程的远程证书无效

However, whenever I call this function, I get the following error message: The remote certificate is invalid according to the validation procedure."

这是什么，我可能是错在这里做有什么想法？我也试过在IIS上运行这一点，但没有帮助。

Any thoughts on what I might be doing wrong here? I also tried running this on IIS but that didn't help.

推荐答案

好吧，我想通了这一点，很多浏览各地后。我错过了这条线在我的code（应该是在函数的第一行）：

Ok, I figured this out after a lot of browsing around. I was missing this line in my code (should be at the first line of the function):

ServicePointManager.ServerCertificateValidationCallback = Function(sender As _
Object, certificate As X509Certificate, chain As X509Chain, sslPolicyErrors As _
SslPolicyErrors) True