# IDataSource.GetList()

Description:

The `GetList` method retrieves a list of media information objects from the Media Gallery of the S60 device. Each object contains information about a single media file.

This is an asynchronous method.

Syntax:

    result = so.IDataSource.GetList(criteria, callback);

Arguments:

- `criteria`:

  This is an object that specifies what media information is returned and how the returned information is sorted. For more information about the object properties and how to define them, see section Criteria for retrieving media information.

- `callback`:

  The `callback` argument is the name of the method that is executed when `GetList` has results or status information to return. You must define this method separately. Follow the instructions in section Defining the callback handler for an asynchronous method to define the `callback` method.

Return value:

The `GetList` method returns an object that contains the initial return value for the asynchronous call it started (see the following table). The actual media file information is returned by the `callback` method in the `ReturnValue` property of its result object. The returned information is described in section Returned media information.

Table: Return value properties for GetList
Property | Description | Value
--- | --- | ---
`result.TransactionID` | This is a number used as an identification to match transactions started with the `GetList` call to one or more calls it generates to `callback`. |
`result.ErrorCode` | This is a number that specifies a predefined error code. | See Service API error codes.
`result.ErrorMessage` | This is a text string that describes the error. | See Media Management Service API error messages.

Example code:

For the complete source of a sample widget that demonstrates how to use this Service API, see the full example.