EssGBeginLock() locks blocks at the database.
ESSG_FUNC_M EssGBeginLock (hGrid, ulOptions);
ESSG_HGRID_T | hGrid |
ESSG_ULONG_T | ulOptions |
hGrid | Handle passed back from EssGNewGrid. |
ulOptions | Reserved for future use. Should be set to zero. |
If successful, returns ESSG_STS_NOERR.
None.
ESSG_VOID_T ESSG_BeginLock (ESSG_HGRID_T hGrid) { ESSG_FUNC_M sts = ESS_STS_NOERR; ESSG_PPDATA_T ppDataIn; ESSG_RANGE_T rDataRangeIn; ESSG_ULONG_T ulOptions; /* connect the grid to a database on the server */ sts = EssGConnect(hGrid, "Rainbow", "Admin", "Password", "Demo", "Basic", ESSG_CONNECT_DEFAULT); if(sts == 0) { ppDataIn = BuildTable(&rDataRangeIn); /* start the lock operation */ ulOptions = 0; sts = EssGBeginLock(hGrid, ulOptions); } if(sts == 0) { /* send the entire grid to define the query */ sts = EssGSendRows(hGrid, &rDataRangeIn, ppDataIn); } if(sts == 0) { /* perform the lock operation */ sts = EssGPerformOperation(hGrid, 0); /* Free the built data */ FreeTwoDim(ppDataIn, rDataRangeIn.ulNumRows); } if(!sts) { EssGEndOperation(hGrid, 0); EssGDisconnect(hGrid, 0); } }