NDataSource Class Methods

In This Topic

For a list of all members of this type, see NDataSource members.

Public Methods

	Name	Description
	AddField	Adds a new field, if CanAddField is true
	AddRow	Overloaded. Adds a row to the data table with default field values, if CanAddRow is true.
	BeginDataChange	Begins a batch data change. During such a change the data table will not notify observers about changes. The call to the BeginDataChange() method, must always be paired with an EndDataChange() call.
	CreateFormulaFieldName	Overloaded. Creates an formula field name, with which you can reference the field in formulas.
	DropAllIndexes	Drops all indexes
	DropIndex	Drops the specified field index
	EndDataChange	Ends a batch data change, previously started by a call to BeginDataChange(). If any changes were made to the data table during the batch data change, the provider will notify the observers for a DataChange. The call to the EndDataChange() method, must always be paired with an BeginDataChange() call.
	Filter	Overloaded. Runs the filter on the entire data source and returns the recordset with the matching records
	GetFieldIndex	Gets the field index of the field with the specified name
	GetFieldInfo	Overloaded. Gets information about the field at the specified index
	GetIndex	Gets the index on the specified field. Returns null if an index was not created.
	GetOrCreateIndex	Gets an existing index or creates such for the specified field index.
	GetRow	Gets the row at the specified index.
	GetValue	Overloaded. Gets the value for a given [row:field]
	InsertField	Inserts a new field at the specified index, if CanInsertField is true
	InsertRow	Overloaded. Inserts a new row with column default, at the specified index, if CanInsertRow is true
	RemoveAllRows	Removes all rows from the data table. if CanRemoveRow is true.
	RemoveField	Removes a field at the specified index, if CanRemoveField is true
	RemoveRow	Removes a row at the specified index, if CanRemoveRow is true
	RenameField	Sets a new name to the field at the specified index, if CanRenameField is true.
	SetValue	Overloaded. Sets a value at the specified index
	TryGetMax	Overloaded. Tries to get the maximum value for the specified field. Returns false if the data table has no records, or the field type is not comparable.
	TryGetMin	Overloaded. Tries to get the minimum value for the specified field. Returns false if the data table has no records, or the field type is not comparable.

Top

Protected Methods

	Name	Description
	OjQ
	OnDataChanged	Called when multiple rows have been inserted, removed or their values have changed.
	OnDataTableChanged	Called when the DataTable property has changed.
	OnFieldInserted	Called when a field has been inserted at the specified index. Raises the FieldInserted event
	OnFieldRemoved	Called when a field has been removed at the specified index. Raises the FieldRemoved event
	OnFieldRenamed	Called when a field has been renamed at the specified index. Raises the FieldRenamed event
	OnNameChanged	Called when the name of the data source has changed.
	OnRowInserted	Called when a row has been inserted at the specified index. Raises the RowInserted event
	OnRowRemoved	Called when a row has been removed at the specified index. Raises the RowRemoved event
	OnValueChanged	Called when the value at the specified row/field position has changed. Raises the ValueChanged event

Top

Reference

NDataSource Class
Nevron.Nov.Data Namespace