Ya. I know there is expensive to keep it on memory. But make always make a connection to database to fetch the data also expensive. Besides, users needs to wait for the procedure connect to database and obtain the data always. If I want to keep the data from database, session is the only way that I can use? Is there any other way to keep those data cross page to page?

I'm new in ASP.net. I plan to develope a project based on ASP.net with C#. But I faced problem where how to store the data in ASP.net 2.0. For example, I had a few table in database -SQL server. Once the user search some information in database, it returned a list of record with content so that user can view them. And I planned to use object oriented way - create few classes such as order, order detail and invoice. Once the database returned the data to asp, it inserts data into those classes (order, order detail or invoice) and those classes can contain more that one record such as order1, order2, order 3 etc. But the problem is where should i store those classes that with data ? Should i store it in session or application? It is because once the user click to other asp.net pages, the classes that with data will lost. right? Sorry that asking this silly question. Any help with examples is appreciated. Danny

Is it possible to implement chat rooms that can use by the asp.net and the window form. Can this chat room use xml web services to connect each other? or got any suggestioon? Thank you thank you

I wish to implement a chat room that use between PDA (pocket pc) and desktop pc using C#. Is it any idea to implement this? XML web service can implement this? or any other suggestion for it? The chat room that I plan to implement is one to one conversation only. Besides, if one of them already started the conversation, other people can't make conversation with him unless he had closed the conversation. Is it possible implement in xml web service? How could xml web service checking the status of the person to see them in conversation or not?

I wish to implement a application to make translation between chinese word to english word in pocket pc. It will allow user write the chinese word in pocket pc then send remotely by .net compact framework(xml web service) to the remote server. Is the pocket pc itself support write foreign language (chinese word) and can xml web service send chinese word to the remote server from pocket pc?

I wish to implement a application to make translation between chinese word to english word in pocket pc. It will allow user write the chinese word in pocket pc then send remotely by .net compact framework(xml web service) to the remote server. Is the pocket pc itself support write foreign language (chinese word) and can xml web service send chinese word to the remote server from pocket pc?

I wish to implement a chat room that use between PDA (pocket pc) and desktop pc using C#. Is it any idea to implement this? XML web service can implement this? or any other suggestion for it?