将FtpWebRequest的KeepAlive设置为true. return Return<Boolean>( new Uri(ftpPath + fileName), request => { request.Credentials = credentials; request.Method = WebRequestMethods.Ftp.UploadFile; request.KeepAlive = true; request.UseBinary = true; using (va…

[WebException: The underlying connection was closed: The message length limit was exceeded.]   System.Net.HttpWebRequest.GetResponse() ; // unlimited…

windows xp .net framework 4.0 HttpWebRequest 报The underlying connection was closed,基础连接已关闭,错误的解决方法 在 HttpWebRequest 请求的上方加入以下代码 ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;…

公司内部开发的winform程序使用了FtpWebRequest下载FTP服务器的文件到本地. 大多数人运行良好,由于我们是试运行逐步有人加入到平台的使用,前两天突然有个别机器无法连接FTP服务器报出了如下错误. The underlying connection was closed:The connection was closed unexpectedly 进行排查没有发现异常,windows事件管理器中查看也没有相关的错误.写的代码也没有发现什么不对的地方 FtpWebRequest r…

EX:The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. 这个是证书引起的.. 用IE浏览器访问接口,右击浏览器窗口,现在属性.查看证书. 应该是不可以的. 应该安装证书.…

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…

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;…

写在前面 在模拟请求的时候,如果url为https的,会报这个错误.大概错误就是:基础连接已关闭:无法建立信任关系的SSL / TLS的安全通道. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. 基础连接已关闭:无法建立信任关系的SSL / TLS的安全通道. 解决办法 在模拟请求的方法中加上这样一句话. ServicePoin…

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…

情况一:使用sqlplus登录 正常输入用户名的口令,就会报错,因为SYS是在数据库之外的超级管理员,所以我们在登录的时候 要在输入口令:口令+as sysdba(比如:123456 as sysdba)情况二:使用PL/SQL登录 这是我们平时的登录数据库很常规的操作,但是用SYS作为用户名登录的时候就会报ORA-28009:connection as SYS should be as SYSDBA OR SYSOPER这样的错解决方法是: 将“连接为”选项框的Normal改为SYSDBA或S…