我已经在RMI问题上挣扎了几个小时了。就目前而言,这是一个非常愚蠢的例子,只有当我在同一台计算机上启动客户端和服务器时才有效。只要我在!=机器上启动Client^服务器,当服务器尝试调用回调时,我就会得到一个异常:
Exception creating connection to: 192.168.244.1; nested exception is:
java.net.SocketException: Network is unreachable
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:632)
at
我正在Silverlight中为WCF服务代理(WCF)实现重连接机制。服务的操作由定时器并行调用。实现非常简单(),但是我的应用程序异常失败:
Uncaught Error: Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.NullReferenceException: Object reference not set to an instance of an object.
at System.Net.Sockets
下面是从Internet源获取Http响应的C#代码片段。当客户端无法获得响应时,它将引发异常。
I am curious to know whether there is any condition where no exception is thrown but HttpStatusCode is not OK (i.e. not is range 200-299).
基本上,我需要知道什么是不抛出异常的坏状态代码。
try{
HttpWebResponse response = (HttpWebResponse)request.GetResponse ();
catch{}
我正尝试在C#中绑定到Active Directory服务器,但在现场我似乎遇到了在测试环境中无法重现的问题。
我得到了一个例外
System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.
at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
at System.DirectoryServices.DirectoryEntry.Bind()
at System.Director
我正在为下面的场景寻找一个很好的设计模式,
我需要遵循以下步骤,在每一步之后,我需要更新DB中的状态。为此,我创建了一个单独的类UpdateStatusDAO,因为updateStatus( status)将更新DB中的详细信息。台阶是,
1. Update Status as Processing Started
2. Read File
3. Update Status as Reading Completed
4. Process File
5. Update Status as File Processing Completed
6. Rename File
7. Update St
我无法在我的VPS和终端打印中使用apt-get命令安装任何软件:
root@ubuntu:~# apt-get install python3
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python3 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
我正在使用贝宝NVP api在一个电子商务网站。它以前运行得很好,但现在它正在抛出"System.Net.WebException: The remote name could not be resolved: 'api-3t.sandbox.paypal.com'"异常。我也试过api.sandbox.paypal.com,但没有运气。有什么想法吗?
谢谢
更新:如果我的客户端从他的系统运行相同的代码。