Nevron Open Vision Documentation
NDataSource Class Members
Fields  Properties  Methods  Events


The following tables list the members exposed by NDataSource.

Public Constructors
 NameDescription
Public ConstructorNDataSource ConstructorOverloaded.   
Top
Public Fields
 NameDescription
Public Fieldstatic (Shared in Visual Basic)DataChangedEvent  
Public Fieldstatic (Shared in Visual Basic)DataTableProperty  
Public Fieldstatic (Shared in Visual Basic)FieldInsertedEvent  
Public Fieldstatic (Shared in Visual Basic)FieldRemovedEvent  
Public Fieldstatic (Shared in Visual Basic)FieldRenamedEvent  
Public Fieldstatic (Shared in Visual Basic)NameChangedEvent  
Public Fieldstatic (Shared in Visual Basic)NDataSourceSchema  
Public Fieldstatic (Shared in Visual Basic)RowInsertedEvent  
Public Fieldstatic (Shared in Visual Basic)RowRemovedEvent  
Public Fieldstatic (Shared in Visual Basic)ValueChangedEvent  
Top
Public Properties
 NameDescription
Public PropertyCanAddFieldDetermines whether the data source supports the AddField operation  
Public PropertyCanAddRowDetermines whether the data source supports the AddRow operation  
Public PropertyCanInsertFieldDetermines whether the data source supports the InsertField operation  
Public PropertyCanInsertRowDetermines whether the data source supports the InsertRow operation  
Public PropertyCanRemoveFieldDetermines whether the data source supports the RemoveField operation  
Public PropertyCanRemoveRowDetermines whether the data source supports the RemoveRow operation  
Public PropertyCanRenameFieldDetermines whether the data source supports the RenameField operation  
Public PropertyDataTableGets the data provider associated with this data source.  
Public PropertyFieldCountGets the count of fields in the data source  
Public PropertyHistoryServiceGets the document effective history service that this node uses to record history (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public PropertyItemOverloaded. Gets or sets the value for the specified row field.  
Public PropertyNameGets or sets the data source name. The data source name is internally bound to the name of the underlying data provider.  
Public PropertyOwnerDocumentGets a reference to the document owning the node. Returns null if the node is not residing in a document. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public PropertyOwnerElementObtains a reference to the element owning the attribute. (Inherited from Nevron.Nov.Dom.NAttribute)
Public PropertyParentNodeGets the parent node in the node hierarchy. (Inherited from Nevron.Nov.Dom.NNode)
Public PropertyRootAttributeGets the last ancestor in attribute ancestors chain, which is an attribute. Returns this if the parent node is not an attribute. (Inherited from Nevron.Nov.Dom.NAttribute)
Public PropertyRootNodeGets the root node in the node hierarchy. (Inherited from Nevron.Nov.Dom.NNode)
Public PropertyRowCountGets the count of rows in the data source  
Public PropertySchemaGets the node schema. (Inherited from Nevron.Nov.Dom.NNode)
Public PropertyTagGets or sets the node tag, that can be any DOM compliant object. This property is not used by the node itself and is intended to provide users with the ability to attach custom data to the node. Attaching custom data to any node can also be achieved with the help of extendeded properties. (Inherited from Nevron.Nov.Dom.NNode)
Top
Public Methods
 NameDescription
Public MethodAccumulateAggregatedNodesAccumulates the aggregated nodes to the specified list (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAccumulateChildrenOverloaded. Accumulates the children of this node, to the provided node list (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAccumulateDescendantsOverloaded. Accumulates the descendants of this node, to the provided node list (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAccumulatePropertyNodesAccumulates the nodes that are exposed by properties of this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAddChildAppends the specified node to the end of the list of children of this node. Throws an exception, if this node is not a collection node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAddEventHandlerOverloaded. Appends an event handler, which is triggered during the AtTarget/Bubbling phase (Inherited from Nevron.Nov.Dom.NNode)
Public MethodAddFieldAdds a new field, if CanAddField is true  
Public MethodAddRowOverloaded. Adds a row to the data table with default field values, if CanAddRow is true.  
Public MethodBeginDataChangeBegins 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.  
Public MethodCanInsertChildQueries whether the specified node can be inserted at the specified index (Inherited from Nevron.Nov.Dom.NNode)
Public MethodCanRecordHistoryDetermines whether this document node can possibly record history for property changes, child changes and fx changes. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public MethodCanRemoveChild (Inherited from Nevron.Nov.Dom.NNode)
Public MethodCanRemoveChildAtQueries whether the node at the specified index can be removed. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodCanSetChildQueries whether the specified node can be set at the specified named slot (Inherited from Nevron.Nov.Dom.NNode)
Public MethodClearLocalValueClears the local value for the specified property. Has no effect on properties backed by member. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodClearValueClears the value of the specified property. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodContainsEventHandlerReturns true if the node contains the specifeid event handler for the specified dom event (Inherited from Nevron.Nov.Dom.NNode)
Public MethodContainsLocalValueGets whether the node contains a local value setting for the specified property (Inherited from Nevron.Nov.Dom.NNode)
Public MethodCreateFormulaFieldNameOverloaded. Creates an formula field name, with which you can reference the field in formulas.  
Public MethodDeepCloneOverloaded. Creates an identical copy of this node subtree. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodDeepEqualsPerforms deep equals of this node object in the specified context and returns true if the given object is a node and its properties and children are equal to those of this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodDropAllIndexesDrops all indexes  
Public MethodDropIndexDrops the specified field index  
Public MethodEndDataChangeEnds 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.  
Public MethodEqualsOverriden to seal the Equals overridable method and to check the nodes for reference equality. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodFilterOverloaded. Runs the filter on the entire data source and returns the recordset with the matching records  
Public MethodGetAggregatedNodesOverloaded. Gets the nodes aggregated by this node (e.g. both children and property nodes) (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetAggregationInfoGets information about the way in which the node is currently aggregated in its parent (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetAncestorGets the ancestor of this node that is the specified levels-up from this ancestor. 0 is the node itself, 1 is ParentNode, 2 is the ParentNode.ParentNode etc. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetChildOverloaded. Gets the child at the specified named slot. If a child node at the slot does not exist, but the named child is marked as CreateOnDemand, a new child node of the default schema is automatically created. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetChildAtGets the child node at the specified index. Throws an exception, if the index is out of range. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetChildrenOverloaded. Gets a list that contains the children of this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetChildrenCountOverloaded. Get the count of child nodes (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetChildrenIteratorGets a child node iterator, which iterates through this node children in forward order (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetDepthFromAncestorDetermines the depth of the node from the specfified ancestor (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetDepthFromRootDetermines the depth of the node from the root. The root is at depth 0. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetDescendantsOverloaded. Gets a list, which contains the descendants of this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetDescendantsCountOverloaded. Returns the number of descendant nodes. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetFieldIndexGets the field index of the field with the specified name  
Public MethodGetFieldInfoOverloaded. Gets information about the field at the specified index  
Public MethodGetFirstAncestorOverloaded. Returns the first node ancestor that satisfies the specified filter or null if such ancestor is not found. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetFirstChildOverloaded. Gets the first child node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetFirstCommonAncestorGets the first ancestor, which is an ancestor of this node and the specified node (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetFirstDescendantOverloaded. Gets the first descendant node of the given schema. This method visits descendants in Depth-First Pre-Order. Children are enumerated in forward order (from first to last). (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetHashCodeOverriden to seal the GetHashCode and return the default implementation. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetIndexGets the index on the specified field. Returns null if an index was not created.  
Public MethodGetLastAncestorOverloaded. Returns the last node ancestor that satisfies the specified filter or null if such ancestor is not found. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetLastChildOverloaded. Gets the last child node (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetLastDescendantOverloaded. Gets the last descendant node of the given schema. This method visits descendants in Depth-First Post-Order. Children are enumerated in reverse order (from last to first). (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetLocalValueOverloaded. Gets the local value of the specified property (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetMediaSafely gets the owner document media. If the document node is not registered in a document returns the screen media. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public MethodGetNextSiblingGets the next sibling node (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetOrCreateIndexGets an existing index or creates such for the specified field index.  
Public MethodGetPathFromAncestorReturns the path from the node to the specified ancestor. The returned path has a root-to-leaf order, meaning that ancestor nodes appear before descendant nodes in the list order. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetPrevSiblingGets the previous sibling node (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetPropertyNodesOverloaded. Gets a list of the nodes, which are exposed as property values (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetReverseChildrenIteratorGets a child node iterator, which iterates through this node children in reverse order (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetReverseSubtreeIteratorOverloaded. Gets an iterator, which iterates through the node and its descendants in a Depth-First-Pre-Order fashion (visits the parent and then visits the children). Children are enumerated in reverse order (from last to first). (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetRowGets the row at the specified index.  
Public MethodGetSubtreeIteratorOverloaded. Gets an iterator, which iterates through the node and its descendants in a Depth-First-Pre-Order fashion (visits the parent and then visits the children). Children are enumerated in forward order (from first to last). (Inherited from Nevron.Nov.Dom.NNode)
Public MethodGetValueOverloaded. Gets the value for a given [row:field]  
Public MethodIndexOfChildGets the index of the specified child node in this node children container. Returns -1 if the node is not a child of this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodInsertChildInserts the specified node at the specified index. Throws an exception, if this node is not a collection node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodInsertFieldInserts a new field at the specified index, if CanInsertField is true  
Public MethodInsertRowOverloaded. Inserts a new row with column default, at the specified index, if CanInsertRow is true  
Public MethodIsChildDetermines whether the specified node is a child node of this node. Note that although the node ParentNode may be this node, this node may not consider the node as child, if it is exposed by a property. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodIsDescendantOfOverloaded. Determines whether this node is a descendant of the specified ancestor (Inherited from Nevron.Nov.Dom.NNode)
Public MethodIsInstanceOfSchemaQueries whether the node is an instance of the specified schema. (i.e. whether the node schema is equal to the specified schema, or is its ancestor). (Inherited from Nevron.Nov.Dom.NNode)
Public MethodMoveToCurrentThreadMoves the node aggregated subtree cache and other thread related information so that the node aggregated subtree can function on the current thread. Call this method when the node has been constructed on another thread, but will continue to be used on the current thread. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodMoveToThreadMoves the node aggregated subtree cache and other thread related information so that the node aggregated subtree can function on the specified thread. Call this method when the node has been constructed on the current thread, but will continue to be used on the specified thread. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveAllChildrenRemoves all child nodes of this node. Works for both collection and container node. In the case of container nodes where a child may be set as non-nullable, throws an exception. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveAllEventHandlersOverloaded. Removes all normal (attarget/bubbling) or sinking event handlers (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveAllRowsRemoves all rows from the data table. if CanRemoveRow is true.  
Public MethodRemoveChildRemoves the specified child node. Works for both collection and container nodes. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveChildAtRemoves the child node at the specified index. Throws an expection if index if out of range. Works for both collection and container nodes. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveEventHandlerOverloaded. Removes the specified event handler for the specified DOM event. The event handler must have been registered for the AtTarget/Bubbling or the Capturing phase depending on the sinking parameter. The event handler must have been registered for the default group. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodRemoveFieldRemoves a field at the specified index, if CanRemoveField is true  
Public MethodRemoveRowRemoves a row at the specified index, if CanRemoveRow is true  
Public MethodRenameFieldSets a new name to the field at the specified index, if CanRenameField is true.  
Public MethodSetChildSets the child instance at the specified child slot. Throws an exception, if this node is not a container node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodSetChildAtSets(substitudes) the child at the specified index. Throws an exception, if this node is not a collection node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodSetLocalValueSets a local value for the specified property. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodSetValueOverloaded. Sets a value at the specified index  
Public MethodToStringReturns a string that represents this node. (Inherited from Nevron.Nov.Dom.NNode)
Public MethodTryGetMaxOverloaded. 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.  
Public MethodTryGetMinOverloaded. 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
 NameDescription
Protected MethodCommitDocumentHistoryTransactionCommits the last started transaction in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodDeepCopyCoreCalled to perform the actual deep copying of the source node. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodEvaluateDocumentSafely evaluates the document in which this document node resides. If the document node does not reside in a document, does nothing. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodIsDocumentHistoryUndoingOrRedoingSafely checks whether the document effective history service is currently undoing or redoing an operation. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodOnAncestorsChangedCalled when the node ancestors chain has changed. IMPORTANT: There is a serious perfomance penalty associated with overriding this method. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnChangedCalled when an arbitrary change occured in this node (Inherited from Nevron.Nov.Dom.NAttribute)
Protected MethodOnChildInsertedCalled when a child node has been inserted. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnChildInsertingCalled when a child node is about to be inserted at the specified index. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnChildRemovedCalled when a child node has been removed. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnChildRemovingCalled when a child node is about to be removed. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnChildrenChangedCalled when a child was inserted or removed from this node. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnDataChangedCalled when multiple rows have been inserted, removed or their values have changed.  
Protected MethodOnDataTableChangedCalled when the DataTable property has changed.  
Protected MethodOnDeepCopiedCalled after the node is deeply copied from the specified source node. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnDeepCopyingCalled before the node is deeply copied for deep cloning from the specified source node. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnDeserializedCalled when the node is deserialized (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnFieldInsertedCalled when a field has been inserted at the specified index. Raises the FieldInserted event  
Protected MethodOnFieldRemovedCalled when a field has been removed at the specified index. Raises the FieldRemoved event  
Protected MethodOnFieldRenamedCalled when a field has been renamed at the specified index. Raises the FieldRenamed event  
Protected MethodOnNameChangedCalled when the name of the data source has changed.  
Protected MethodOnParentChangedCalled when the node parent has changed. Raises the ParentChangedEvent. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnParentChangingCalled when the parent of the node is about to be changed. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnPropertyLocalValueChangingCalled when the local value of a property is about to be changed. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnPropertyValueChangedCalled when the local and/or computed value of a property has changed. (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnRegisteredCalled after the document node is registered in its owner document. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodOnRowInsertedCalled when a row has been inserted at the specified index. Raises the RowInserted event  
Protected MethodOnRowRemovedCalled when a row has been removed at the specified index. Raises the RowRemoved event  
Protected MethodOnSerializingCalled when the node is being serialized (Inherited from Nevron.Nov.Dom.NNode)
Protected MethodOnUnregisteredCalled after the document node is unregistered from its owner document. (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodOnValueChangedCalled when the value at the specified row/field position has changed. Raises the ValueChanged event  
Protected MethodPauseDocumentHistoryServicePauses the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodRecordDocumentHistoryFieldRecords the state of the specified field in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodRecordDocumentHistoryFieldsRecords the state of the specified fields in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodRecordDocumentHistoryUnitRecords a history unit in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodResumeDocumentHistoryServiceResumes the owner document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodRollbackDocumentHistoryTransactionRolls back the last started transaction in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Protected MethodStartDocumentHistoryTransactionOverloaded. Starts a new transaction, in the document effective history service (Inherited from Nevron.Nov.Dom.NDocumentNode)
Top
Public Events
 NameDescription
Public EventChangedOccurs when this node has changed. (Inherited from Nevron.Nov.Dom.NNode)
Public EventChangingOccurs when this node is about to be changed. (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildInsertedOccurs when a child node has been inserted in this node (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildInsertingOccurs when a child node is about to be inserted in this node (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildRemovedOccurs when a child node has been removed from this node (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildRemovingOccurs when a child node is about to be removed from this node (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildrenChangedOccurs when the children set of this node has changed, either because a new child was inserted or because an existing child was removed. (Inherited from Nevron.Nov.Dom.NNode)
Public EventChildrenChangingOccurs when the children set of this node is about to change, either because a new child is about to be inserted or because an existing child is about to be removed. (Inherited from Nevron.Nov.Dom.NNode)
Public EventDataChangedOccurs when multiple rows have been inserted or removed or when multiple cell values have changed.  
Public EventFieldInsertedOccurs when a field has been inserted in the data source.  
Public EventFieldRemovedOccurs when a field has been removed from the data source.  
Public EventFieldRenamedOccurs when the name of a field in the data source has changed.  
Public EventNameChangedOccurs when the name of the data source has changed.  
Public EventParentChangedOccurs when the parent node of this node has changed. (Inherited from Nevron.Nov.Dom.NNode)
Public EventRegisteredOccurs when the document node is registered in a document (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public EventRowInsertedOccurs when a row has been inserted in the data source.  
Public EventRowRemovedOccurs when a row has been removed from the data source.  
Public EventUnregisteredOccurs when the document node was unregistered from a document (Inherited from Nevron.Nov.Dom.NDocumentNode)
Public EventValueChangedOccurs when a [row;field] cell value has changed.  
Top
See Also

Reference

NDataSource Class
Nevron.Nov.Data Namespace

 

 


©2022. Nevron Software LLC.

Send Feedback