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VoDbRecordInfo Function (DWord, Usual, Usual)

X#
Retrieve information about a record.

Namespace:  XSharp.RT
Assembly:  XSharp.RT (in XSharp.RT.dll) Version: 2.21
Syntax
Copy
 FUNCTION VoDbRecordInfo(
	kInfoType AS DWORD,
	nRecID AS USUAL,
	ptrRetVal AS USUAL
) AS LOGIC
Request Example View Source

Parameters

kInfoType
Type: DWord
Determines what type of information is retrieved..
nRecID
Type: Usual
The ID of the record to retrieve information on.
A value of 0L means the current record.
ptrRetVal
Type: Usual
A pointer to a polymorphic value.
This value will receive the requested information if the function is successful and will be unchanged otherwise.
If you just want to retrieve information, this value must be NIL before calling the function.
Using a non-NIL value is not currently supported by any of the supplied RDDs .
This feature is reserved for RDDs that allow you to change the information rather than just retrieve it.

Return Value

Type: Logic
TRUE if successful; otherwise, FALSE.
Remarks
VODBRecordInfo() is similar to DBRecordInfo().
This function, however, does not call the error handler and will not, therefore, produce a runtime error message or create an error object if it fails. Thus, it may be important to check the return value to determine if the function succeeded.
The global structure, StrucErrInfo, will contain needed information regarding any error that occurs. See DBRecordInfo() for more information.
Examples
The following examples retrieve record information:
X#
Copy
 1FUNCTION ShowRecordInfo() AS VOID
 2    LOCAL uResult AS USUAL
 3    uResult := NIL
 4    IF VODBRecordInfo(DBRI_LEN,0,@uResult)
 5        ? "RecSize(): ", uResult
 6    ELSE
 7        DoError()
 8    ENDIF
 9    IF VODBRecordInfo(DBRI_LOCKED,200,@uResult)
10        ? "Locking flag of record 200: ", uResult
11    ELSE
12        DoError()
13    ENDIF
14    RETURN
15STATIC FUNCTION DoError() AS USUAL
16    LOCAL uRetCode<br />
17AS USUAL
18    LOCAL oError  <br />
19AS USUAL
20    oError := ErrorBuild(@strucErrInfo)
21    oError:FuncSym := #VODBRecordInfo
22    RETURN EVAL(ErrorBlock(), oError)
See Also