| Along with information expanding and network popularization, the way thataccessing single database doesn't satisfy the demand. The requirement to accessdistributed database is increased. The very important problem when design a distributeddatabase accessing tool is how to make users access data conveniently and efficiently.Accessing data locating at different servers is not been aware, and distributed database ismanipulated as if local database is manipulated. According to this goal, some research ondistributed database accessing technology based on. NET Framework was done in thispaper.Distributed database theory and. NET technology were introduced at first, then somebasic database accessing technologies were analyzed, including Open DatabaseConnectivity(ODBC), Data Accessing Object(DAO), Remote Data Object(RDO), JAVADatabase Connectivity(JDBC) and Universal Data Access Technology(OLE DB/ADO).ADO. NET technology is the up to date database accessing technology in. NETFramework. The system framework and characteristics of objects in ADO. NET wereanalyzed thoroughly. On the foundation of above theoretical analysis, a query method ofdistributed database based on ADO. NET was brought forward. The data accessingefficiency between ADO and ADO. NET was tested, and the way that optimize applicationperformance with stored procedure was discussed.However, some problems in the database accessing of ADO. NET existed. The mostimportant problem was that there was no object/relation mapping technology inADO. NET. So, it was aimed to solve the existing problem of which ADO. NET accessdatabase involved. Object/Relation mapping technology based on ADO. NET wasintroduced, and one database accessing frame ORM was structured. The ORM hasalready successfully been applied to the on-line testing system. |
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