IExpressionStore::Import
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Use this method to import expressions from a file into the expression store.
Definition
HRESULT IExpressionStore::Import(BSTRbstrFileName);
Parameters
bstrFileName
[in] A BSTR that contains the path and name of the file from which to import the expressions.
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 either standard or custom COM HRESULT error values to indicate failure. For more information about standard COM errors, see Standard COM Errors.
The following table shows the custom COM errors that this method can return.
| Constant | Value | Description |
| E_EXPR_BADCONNECTION | 0x8110001F | Invalid connection |
| E_EXPR_NOCONNECTIONSTRING | 0x8110000D | No connection string specified |
| E_EXPR_NONEMPTYSTORE | 0x8110000C | Cannot import to a non-empty store |
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 expression store must be empty in order to import expressions.
The import file must contain the XML schema for the expression recordset followed by the XML representation of each expression recordset. Expression recordsets with invalid expression bodies are imported but will cause an error upon evaluation.
Use the Export method to copy the XML schema for the expression recordset and all the expressions from the expression store to a file.
Call the Connect method before calling the Import method.