IExprFltrQueryBldr::ConvertExprUsingDict
.gif "Ee810318.c++_off(en-US,CS.10).gif")
.gif "Ee810318.vb_on(en-US,CS.10).gif")
Use this method to convert an expression in Extensible Markup Language (XML) form containing a reference to a Dictionary object into a SQL filter query string.
Definition
HRESULT IExprFltrQueryBldr::ConvertExprUsingDict(BSTRpExpr,IDispatch*pDict,BSTR*pDest);
Parameters
pExpr
[in] A BSTR that contains the expression in XML form.
pDict
[in] A pointer to the IDispatch interface of a Dictionary object that contains the values referenced by the expression.
pDest
[out, retval] A pointer to a BSTR used to return the SQL filter string.
Return Values
This method returns an HRESULT indicating whether the method completed successfully. See the Error Values section for more details.
Error Values
This method returns S_OK (0x00000000) to indicate success and standard COM HRESULT error values to indicate failure. For more information about standard COM errors, see Standard COM Errors. Additional information may be available using the global Err object, which can be accessed using the API function GetErrorInfo. In particular, the GetDescription method of the IErrorInfo interface may return a text description of the error.
Remarks
In the XML expression, a reference to a Dictionary object is made by preceding the value inside the IMMED-VAL tags with the keyword 'context'. If such a reference is found during conversion of the expression, the reference is replaced with the value read from the Dictionary object.
The pDest parameter contains valid data only if the method completes successfully.
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.