在C＃中应用程序之间传递信息 [英] Passing Information Between Applications in C#

问题描述

全部。首先，我知道
http://en.wikipedia.org/wiki/Inter-process_communication

其中一些提供双向通信，有些需要考虑系统安全性（防病毒和防火墙限制，您需要在其设置中添加应用程序作为例外）。

通过WM_COPYDATA发送消息可以通过SendMessage完成，PostMessage是不支持，这意味着通信是同步的。

使用outproc单例COM对象是另一种方式，它不像其他方式那么简单应用程序。必须在相同的安全上下文中运行以访问相同的COM对象。

启动单独的应用程序可能会对您可以传递的通信方法或数据类型产生一些限制，但是分离它们也将保护他们免于失败（应用程序崩溃不会关闭另一个）。

如果两个部分总是在同一台PC上运行，则使用其中一个作为dll [inproc]更简单。使用其他技术，如Socket，Remoting，WCF将为您提供更多的通信灵活性，即这两个部分可以在不同的PC中进行微小修改。

All. Firstly I am aware of the question Send data back to .exe from dll, however the answers there leave too many open ends for me and as I have no experience of what I am attempting I feel a new question is warranted.

I have an existing C# [All WinForms here] app that heavily relies on SQL. We have been asked (by clients) to provide an SQL Editor and library that can be used to develop and test SQL, but that can also be used to paste directly back in to the main application. The new SQLEditor is a multi-threaded application that parses and executes TSQL. I now have some things to consider; what is the best way to launch this second application from the main application::

1. Make the second app into a DLL and load into the main project, call the second app as a new form (SqlEditor sqlEd = new SqlEditor() etc.)? What are the implication in terms of thread bombardment, would I need [STAThread] - as I want both multithreaded apps to be available and active at the same time.

2. To launch as a separate .exe from the main application?

Depending on you advice; in either of the above cases - what is the best way I can pass information back to the main application from a click event in the second application whilst they are still both running and active [WCF, ApplicationDomains etc.]? Would the Observer design pattern come in to play here?

To make this question a little more appealing, here is the SQL Editor:

I plan to have a button which pastes the selected SQL back into the main application.

I am also aware that there are multiple questions here - which I apologise for. Thanks very much for your time.

解决方案

You have multiple choices for IPC(Inter Process Communication) such as: Mailslot, NamedPipe, Memory Mapped File, Socket, Windows Messaging, COM objects, Remoting, WCF... http://msdn.microsoft.com/en-us/library/windows/desktop/aa365574(v=vs.85).aspx http://en.wikipedia.org/wiki/Inter-process_communication

Some of them provide two-way communication, some needs considaration about system security(antivirus & firewall restrictions, you need to add the application as an exception in their settings).

Sending message through WM_COPYDATA can be done just by SendMessage, PostMessage is not supported, it means that the communication is sync.

Using outproc singleton COM object is another way, its not as simple as the other ways and both app. must be run on the same security context to access the same COM object.

Launching a separate application can coz some restrictions in communication methods or types of data you can pass, but separation of them will also protect them from their failures(App. crash will not close the other one).

If the two parts are always run on the same PC, using one of them as dll[inproc] is simpler. Using other techniques such as Socket, Remoting, WCF will provide you with more flexibility for communication, i.e. the two parts can run in different PCs with minor modifications...

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