Nevron Open Vision Documentation
NEmptyDataTable Class Members
Fields  Properties  Methods 


The following tables list the members exposed by NEmptyDataTable.

Public Fields
 NameDescription
Public Fieldstatic (Shared in Visual Basic)InstanceThe Empty data provider.  
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Public Properties
 NameDescription
Public PropertyCanAddFieldDetermines whether the data table supports the AddField operation (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyCanAddRowOverridden. Returns false.  
Public PropertyCanInsertFieldDetermines whether the data table supports the InsertField operation (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyCanInsertRowOverridden. Returns false.  
Public PropertyCanRemoveFieldDetermines whether the data table supports the RemoveField operation (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyCanRemoveRowOverridden. Returns false.  
Public PropertyCanRenameFieldDetermines whether the data table supports the RenameField operation (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyFieldCountOverridden. Returns 0.  
Public PropertyItemOverloaded. Gets or sets the value for the specified row field. (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyNameGets the name of the data table. (Inherited from Nevron.Nov.Data.NDataTable)
Public PropertyRowCountOverridden. Returns 0.  
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Public Methods
 NameDescription
Public MethodAddFieldAdds the specified field, if CanAddField is true. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodAddObserverOverridden. Overriden to do nothing  
Public MethodAddRowOverloaded. Adds a row (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodBeginDataChangeBegins a batch data change. During such a change the data provider will not notify observers about changes. The call to the BeginDataChange() method, must always be paired with an EndDataChange() call. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodDeepCloneReturns this instance (e.g. a shallow copy). (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodDropAllIndexesDrops all indexes (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodDropIndexDrops the specified field index (Inherited from Nevron.Nov.Data.NDataTable)
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. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodFilterOverloaded. Runs the filter on the entire data table and returns the recordset with the matching records (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodGetFieldIndexOverridden. Returns -1  
Public MethodGetFieldInfoOverloaded. Overridden. Throws an expception  
Public MethodGetIndexGets the index on the specified field. Returns null if an index was not created. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodGetObserversOverridden. Overriden to return an empty array  
Public MethodGetOrCreateIndexGets an existing index or creates such for the specified field index. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodGetRowGets the row at the specified index. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodGetValueOverloaded. Overridden. Throws an expception  
Public MethodInsertFieldInserts the specified field at the specified index, if CanInsertField is true. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodInsertRowOverloaded. Inserts a new row with column default, at the specified index, if CanInsertRow is true (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodRemoveAllRowsRemoves all rows (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodRemoveFieldRemoves the field at the specified index, if CanRemoveField is true (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodRemoveObserverOverridden. Overriden to do nothing  
Public MethodRemoveRowRemoves a row at the specified index, if CanRemoveRow is true (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodRenameFieldSets a new name to the field at the specified index, if CanRenameField is true. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodSetValueOverloaded. Sets a value at the specified index. If the specified field is readonly, throws an exception. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodTryGetMaxOverloaded. Tries to get the maximum value for the specified field. Returns false if the data provider has no records, or the field type is not comparable. (Inherited from Nevron.Nov.Data.NDataTable)
Public MethodTryGetMinOverloaded. Tries to get the minimum value for the specified field. Returns false if the data provider has no records, or the field type is not comparable. (Inherited from Nevron.Nov.Data.NDataTable)
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Protected Methods
 NameDescription
Protected MethodAddFieldCoreOverridden. Adds a new field  
Protected MethodAddRowCoreOverloaded. Overridden. Adds a new row with field default values.  
Protected MethodInsertFieldCoreOverridden. Inserts a new field at the specified index  
Protected MethodInsertRowCoreOverloaded. Overridden. Inserts a new row with field default values  
Protected MethodOnDataChangedNotifies observers for a batch data change. (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnFieldInsertedCalled when a field has been inserted at the specified index. Raises the FieldInserted notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnFieldRemovedCalled when a field has been removed at the specified index. Raises the FieldRemoved notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnFieldRenamedCalled when a field has been renamed at the specified index. Raises the FieldNameChanged notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnNameChangedCalled when the name of the data table changes (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnRowInsertedCalled when a row has been inserted at the specified index. Raises the RowInserted notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnRowRemovedCalled when a row has been removed at the specified index. Raises the RowRemoved notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodOnValueChangedCalled when the value at the specified row/field position has changed. Raises the ValueChanged notification (Inherited from Nevron.Nov.Data.NDataTable)
Protected MethodRemoveAllRowsCoreOverridden. Removes all rows  
Protected MethodRemoveFieldCoreOverridden. Removes the field at the specified index  
Protected MethodRemoveRowCoreOverridden. Removes a row at the specified index  
Protected MethodRenameFieldCoreOverridden. Sets a new name to the field at the specified index, if CanRenameField is true.  
Protected MethodSetValueCoreOverridden. Sets the value for a given [row:field], if CanSetValue is true  
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See Also

Reference

NEmptyDataTable Class
Nevron.Nov.Data Namespace

 

 


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