IDataSource.Delete()

Description:

The Delete method deletes a calendar from the device +or one or more entries from a calendar. Entries are deleted from the specified +calendar or, if no calendar is specified, from the default one.

For deleting a calendar, this method is called synchronously. For deleting +calendar entries, this method can be called both synchronously and asynchronously.

Syntax:

For synchronous calls:

result = so.IDataSource.Delete(criteria);

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For asynchronous calls:

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

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Arguments:

criteria:
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This is an object that specifies which calendar or calendar entries +to delete. For more information about the object properties and how to define +them, see section Criteria for deleting calendar information.
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callback:
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The callback argument is the name of the method +that is executed when an asynchronous Delete call 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.
+
This argument is used only with an asynchronous Delete call.
+ +

Return value:

If synchronous, the Delete method returns an object +that contains an error code and an error message.

If asynchronous, the method returns an object that contains a transaction +ID for the callback instance, +an error code, and an error message. When the asynchronous call has completed, callback returns +an object that contains an error code and an error message (see Table: Callback return value).

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**Table:** Return value +properties for Delete
+ Property +	+ Description +	+ Value +
+ `result.TransactionID` +	+ This is a number used as an identification to match transactions started +with an asynchronous `Delete` call to one or more calls +it generates to `callback`. + This property is only valid for asynchronous calls. +
+ `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 Calendar Service API error messages. +

Remarks:

The default calendar cannot be deleted.
To delete a calendar or entries from a calendar, the corresponding +calendar file must exist on the device.

Example code:

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

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