Json Post到 https的坑 - the underlying connection was closed an unexpected error occurred on a send（远程服务器未知错误导致关闭）

【Json Post到 https的坑 - the underlying connection was closed an unexpected error occurred on a send（远程服务器未知错误导致关闭）】的更多相关文章

Json Post到 https的坑 - the underlying connection was closed an unexpected error occurred on a send（远程服务器未知错误导致关闭）

最近做了一个安装包,安装包会弹出dotnet的窗体,这个安装包会去调用https的一个api.用测试程序测试窗体都是好的.一旦打入安装包后,就报错.研究了半天,原来是https惹的祸解决方案: .NET 4.6 and above. You don’t need to do any additional work to support TLS 1.2, it’s supported by default.DOTNET 4.6.1 以上版本,默认就可以了 .NET 4.5. TLS 1.2 i…

The underlying connection was closed: An unexpected error occurred on a send

操作系统是Windows Server 2003 x64 SP2,使用Framework 4.0,在使用WebClient访问某些特定的HTTPS站点时,会引发异常: Unhandled Exception: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Authentication…

微信接口问题(The underlying connection was closed: An unexpected error occurred on a send)

突然在调用微信接口是报:The underlying connection was closed: An unexpected error occurred on a send错误,跟踪了半天,是因为在调用阿里人脸识别接口时,接认证设置成了SSL3,而微信接口支持TLS,所以就会报错.并且在更新后又正常的问题, ServicePointManager.SecurityProtocol = SecurityProtocolType.SSL3;…

The underlying connection was closed: An unexpected error occurred on a rece

服务器问题,在后台访问外网了,特别是https的网站,容易出这个问题. 修改服务器配置,或修改代码解决.…

The underlying connection was closed: An unexpected error occurred on a receive

解决方法 webRequest.KeepAlive = false; ServicePointManager.ServerCertificateValidationCallback += (s, cert, chain, sslPolicyErrors) => true; //WebRequest请求被中止: 未能创建 SSL/TLS 安全通道在请求之前插入TLS安全协议: ServicePointManager.SecurityProtocol = SecurityProtocolType…

Web Server 使用WebClient 发送https请求 The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel

使用WebClient 发送https请求使用WebClient发送请求时,并且是以https协议: WebClient webClient = new WebClient(); string result = webClient.DownloadString(url); error : The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure chan…