IMSCSPage_3_0::RequestNumber
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Use this method to retrieve a value from a URL query string or form post variable and convert it to a number based on the specified or default locale.
Optionally, the RequestNumber method checks the converted number against the specified range and validates it based on the specified locale.
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Important
- This method is included for backwards compatibility with Site Server 3.0 Commerce Edition. See the AppFrameWork object, which provides similar functionality to that found in this method. Using the AppFrameWork methods is the preferred way of adding this type of functionality to your site, and will ensure better compatibility with future versions of Microsoft Commerce Server.
Definition
HRESULT IMSCSPage_3_0::RequestNumber(BSTRbstrName,VARIANTvtDefault,VARIANTvtMin,VARIANTvtMax,VARIANTvtLocal,VARIANT*pvtRet);
Parameters
bstrName
[in] A BSTR that contains the name of the URL-query string or form-post variable to retrieve.
vtDefault
[in, optional] A VARIANT that contains the value to return if the requested URL-query string or form-post variable is not present or contains no value. If this parameter is not supplied, the method returns NULL.
vtMin
[in, optional] A VARIANT that contains the number value that specifies the low end of the range against which to validate the converted value. If the converted value is less than vtMin, then NULL is returned. If the variant is of type VT_NULL, the vtMin parameter value is not considered in the validation process.
vtMax
[in, optional] A VARIANT that contains the number value that specifies the high end of the range against which to validate the converted value. If the converted value is greater than vtMax, then NULL is returned. If the variant is of type VT_NULL, the vtMax parameter value is not considered in the validation process. If the converted value is greater than vtMax, the method returns NULL.
vtLocale
[in, optional] A VARIANT that contains the number that specifies the locale to use to convert the bstrName parameter. If this parameter is not used, the RequestNumber method uses the value of the Locale property of the DataFunctions object.
pvtRet
[out, retval] A pointer to a VARIANT used to return the converted number. If any validation fails, the return value will be NULL.
Return Values
This method returns an HRESULT indicating whether or not it 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
The pvtRet parameter points to valid data only if the method completed successfully.
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.
See Also
IDataFunctions_4_0::get_Locale, put_Locale
IDataFunctions_4_0::ConvertNumberString