DbServer.BLOBRootPut Method |  |
Store data in the root area of a BLOB file.
Namespace: VO
Assembly: VORDDClasses (in VORDDClasses.dll) Version: 2.21
SyntaxRequest Example
View Source
TRUE if successful; otherwise, FALSE.
Parameters
- uBlob (Optional)
- Type: Usual
The data you want to put into the BLOB file's root area. uBLOB can be any X# usual data type, except code block and object.
Return Value
Type: UsualTRUE if successful; otherwise, FALSE.
Remarks
DBServer:BLOBRootPut() allows the storage of one—and only one—piece of data to a BLOB file's root area (there is no size limitation on this one piece of data). After storing the new data, DBServer:BLOBRootPut() releases the space associated with any data previously stored in the BLOB file's root area.
 Tip |
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| Because the root data does not reference a particular record in the data server, it is not affected by DBServer:RLock(), nor is it subject to the DataServer:ConcurrencyControl settings. Therefore, if the data server is opened in shared mode, you should use DBServer:BLOBRootLock() before calling DBServer:BLOBRootGet(). |
Examples
This example uses DBServer:BLOBRootPut() to store system settings to a BLOB file after modification:
X#
1FUNCTION UpdateSettings() 2LOCAL aSettings AS ARRAY 3LOCAL oDBCust AS DBServer 4oDBCust := Customer{} 5IF oDBCust:BLOBRootLock() 6// Get any existing settings 7aSettings := oDBCust:BLOBRootGet() 8IF Empty(aSettings) 9// This function would populate aSettings with default data 10aSettings := oDBCust:GetDefaultSettings() 11ENDIF 12// This function would allow the user to 13// modify the settings. 14IF oDBCust:ModifySettings(aSettings) 15// Finally, store the settings 16oDBCust:BLOBRootPut(aSettings) 17ENDIF 18oDBCust:BLOBRootUnlock() 19ELSE 20aSettings := {} 21Alert("Could not obtain a lock on the root") 22ENDIF 23oDBCust:Close() 24RETURN aSettings
See Also