Semata
Namespace: Semata.DataStore.ObjectModel
A wrapper for an Item. Classes generated for Items inherit from this class. The classes will have a property for each of their Attributes and Associations. These properties return a class that wraps the Attribute or Association. Changes to attributes are cached until the Write method is invoked.
public abstract class ItemObject : INotifyPropertyChangedAndWritten, INotifyDataErrorInfo, IEquatable<ItemObject>
Implements: INotifyPropertyChangedAndWritten , INotifyDataErrorInfo , IEquatable<ItemObject>
Constructors
| Name | Description |
| ItemObject(ItemObjectInitializer) |
Constructs an instance of ItemObject |
Events
| Name | Description |
| ErrorsChanged |
Occurs when the validation errors have changed for a property or for the entire object |
| ItemObjectWritten |
Occurs once after any changed property values are written |
| PropertyChanged |
Occurs when a changed property value is changed |
| PropertyWritten |
Occurs when a changed property value is written |
Properties
| Name | Description |
| DataStore |
Returns the DataStore object |
| EventDispatcher |
Returns the EventDispatcher used by the DataStore |
| HasErrors |
Gets a value that indicates whether the object has validation errors. |
| IsChanged |
Are there any changes to properties that have not been written to the DataStore? |
| IsDeleted |
Has this Item been deleted? |
| IsNew |
Is the data new? In other words, has been written to the DataStore. |
| ItemType |
The ItemType of this ItemObject |
| deleteErrorMessages_ |
Checks that a delete will succeed |
Methods
| Name | Description |
| AddError(string, string) |
Adds a validation error for a specified property or for the entire object. |
| CancelEdit() |
Cancel changes to properties that have not been written to DataStore |
| ClearErrors() |
Clears the validation errors for all specified properties and the entire entity. |
| ClearErrors(string) |
Clears the validation errors for a specified property or for the entire object. |
| Delete() |
Delete the Item from the DataStore |
| Delete(bool) |
Delete the Item from the DataStore, and throw exception if errors occur and throwException is true <param name="throwException">if true errors will cause exception to be thrown.</param> |
| Equals(ItemObject) |
returns true if ItemObjects are the same |
| GetErrors() |
Gets the validation errors for all specified properties and the entire entity. |
| GetErrors(string) |
Gets the validation errors for a specified property or for the entire object. |
| GetItemId() |
Returns the ItemID of this object |
| NotifyErrorsChanged(DataErrorsChangedEventArgs) |
Raises event ErrorsChanged |
| NotifyItemObjectWritten(EventArgs) |
Raises event ItemObjectWritten |
| NotifyPropertyChanged(PropertyChangedEventArgs) |
Raises event PropertyChanged |
| NotifyPropertyWritten(PropertyChangedEventArgs) |
Raises event PropertyWritten |
| OnItemObjectCanDelete(List<string>) |
Called by Delete prior to deleting item. Deletion will be be prevented if result has errors |
| OnItemObjectCreated() |
Called by Write when a new item is created. |
| OnItemObjectDeleting() |
Called by Delete prior to deleting item. Main difference to above that this is called inside transaction that deletes item. |
| OnItemObjectValidate() |
Called by Validate (which is also called by Write) |
| OnItemObjectWriting() |
Called by Write before all the changed properties are set. |
| OnItemObjectWritten() |
Called by Write after all the changed properties are set. |
| QueuePropertyWritten(PropertyChangedEventArgs) |
Queue a property written event to be fired after transactions ends |
| Validate() |
Validate the Item |
| Write() |
If it is a new Item create the Item, and write any changed properties to the DataStore. |
| Write(bool) |
Write Item and throw exception if errors occur <param name="throwException">if true errors will cause exception to be thrown.</param> |