| 摘要 |
Methods and apparatus for scrolling database records, particularly in a client-server computing system, are disclosed. A database holds records, accessible by a server, that each include a unique identifier. A client requests the server to retrieve a set of database records. Records are retrieved from the database and stored on the server. The server determines an upper context token and a lower context token corresponding to the end records for a subset of those records. The upper and lower context tokens include a reference to the respective unique identifier. The first subset records is passed to the client for display. The client then makes a scrolling request by a previous or next subset of data, and passes the relevant upper or lower context token to the server. The server utilizes a context token to locate the adjacent subset of retrieved records, determines new and upper and lower context tokens for that adjacent subset of records, then returns the subset to the client together with the new context tokens.
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