Himself has always been to make two layers of database management, familiar with network programming is not, now you need to do a three-tier examination system, plans to use the Delphi xe3 datasnap do an intermediary, thinking for a few days, there are a few doubts, strives for the warrior solutions,
1, as a result of the exam system operation machine of teachers in the school computer room must be xp system, whether the datasnap tcpip connection is limited by the number of connections, xp seems to only 10! How to solve?
2, the three layer system is client request to the server, and how to implement the server to the client issued instructions, such as the unified interface, open the test issued the test start, end and other instructions!

CodePudding user response:

Passing by, look forward to appear,,,

CodePudding user response:

1 didn't heard about the limit
2 the radio can TDSServer. CastbroadMesssage (args: TJSONValue);

CodePudding user response:

refer to the second floor jjwandjy response:

1 didn't heard about the limit
2 the radio can TDSServer. CastbroadMesssage (args: TJSONValue);

Collect the

CodePudding user response:

1 \ the number of connections will not be restricted, but you write process should pay attention to the efficiency of the three layer structure,
2 \ you can set a parameter in the database field, front end before scanning parameters, the teacher points after the start of the front desk to continue,
Feel to do so than some stability by radio,