向 https 发出 HTTP 请求时发生错误

编程问答 2022-05-27

问题描述

我在使用 https Web 服务的 .Net framework 4.6 中有 asmx Web 服务。这是我在调用服务之前的以下代码：

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 | SecurityProtocolType.Ssl3;

它在调试模式下工作正常。我可以查看预期的数据，但是在发布模式下运行应用程序或在 vs2017 中没有调试时，我收到以下错误：

Web ServiceSystem.ServiceModel.CommunicationException:  
An error occurred while making the HTTP request to https://externalwebservice address. 
This Could be due to the fact that the server certificate is not configured properly 
with HTTP.SYS in the HTTPS case. This Could also be caused by a mismatch of the 
security binding between the client and the server. 
---> System.Net.WebException: The underlying connection was closed: 
An unexpected error occurred on a send. 
---> System.IO.IOException: Unable to read data from the transport connection:   
An existing connection was forcibly closed by the remote host. 
---> System.Net.sockets.socketException: An existing connection was forcibly closed  
by the remote host.

我在 IIS 中安装了一个自签名证书。

我真的很困惑它在调试模式下有效，但在发布模式下无效。 请帮忙。

解决方法

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