cachesize，每次拿过来放到内存中的数量，你看帮助，写得很清楚 if CacheSize is set to 20, when the dataset is first activated the associated provider retrieves the first 20 rows into local memory. As the row pointer is moved through this recordset, the provider retrieves the data from the local memory buffer. If the dataset抯 row pointer moves beyond the last of these 20 buffered rows, the provider retrieves the next 20.
if CacheSize is set to 20, when the dataset is first activated the associated provider retrieves the first 20 rows into local memory. As the row pointer is moved through this recordset, the provider retrieves the data from the local memory buffer. If the dataset抯 row pointer moves beyond the last of these 20 buffered rows, the provider retrieves the next 20.