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DbObservableObject

A base class for Entity Framework objects to implement , , and in front-end development.

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Syntax

public class DbObservableObject : EasyObservableObject, INotifyPropertyChanged, IDisposable, IRevertibleChangeTracking, IChangeTracking

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Inheritance

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Implements

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Constructors

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DbObservableObject

public DbObservableObject()

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Properties

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IsChanged

[JsonIgnore]
public bool IsChanged { get; set; }
Specifies whether or not the object has changed.

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Returns

bool

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IsGraphChanged

[JsonIgnore]
public bool IsGraphChanged { get; }

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Returns

bool

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OriginalValues

[JsonIgnore]
public Dictionary<string, object> OriginalValues { get; }

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Returns

Dictionary<string, object>

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ShouldTrackChanges

[JsonIgnore]
public bool ShouldTrackChanges { get; }
Specifies whether or not property value changes should be tracked.

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Returns

bool

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Methods

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AcceptChanges

public void AcceptChanges()
Clears the list and sets to false.

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AcceptChanges

public void AcceptChanges(bool goDeep)
Clears the list and sets to false, and optionally traverses the object graph to call on any children.

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Parameters

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ClearRelationships

public void ClearRelationships()
Sets any child relationships (0..1:1 or 1:*) to null.

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GetRelatedEntityCollectionProperties

public IEnumerable<PropertyInfo> GetRelatedEntityCollectionProperties()

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Returns

IEnumerable<PropertyInfo>

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GetRelatedEntityProperties

public IEnumerable<PropertyInfo> GetRelatedEntityProperties()

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Returns

IEnumerable<PropertyInfo>

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RecurseGraphInternal

protected static void RecurseGraphInternal(DbObservableObject obj, Action<DbObservableObject> action, bool goDeep = false, HashSet<DbObservableObject> visited = null)

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Parameters

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RecurseGraphInternal<T>

protected static IEnumerable<T> RecurseGraphInternal<T>(DbObservableObject obj, Func<DbObservableObject, T> func, bool goDeep = false, HashSet<DbObservableObject> visited = null)

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Parameters

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Returns

IEnumerable<T>

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RejectChanges

public void RejectChanges()
Loops through the list, sets any property that has changed back to the value it had when was called, clears the list, and sets to false.

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RejectChanges

public void RejectChanges(bool goDeep)

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Parameters

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Set<T>

protected override void Set<T>(string propertyName, ref T field, T newValue)
Assigns a new value to the property. Then, raises the PropertyChanged event if needed.

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Parameters

  • propertyName string: The name of the property that changed.
  • field T: The field storing the property’s value.
  • newValue T: The property’s value after the change occurred.

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ToDeltaPayload

public ExpandoObject ToDeltaPayload(bool deepTracking = false)
Loops through the keys in the list and returns an containing JUST the new values for the properties that changed.

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Parameters

  • deepTracking bool:

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Returns

ExpandoObject An containing JUST the new values for the properties that changed.

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ToDeltaPayloadInternal

protected ExpandoObject ToDeltaPayloadInternal(DbObservableObject obj, bool deepTracking = false)

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Parameters

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Returns

ExpandoObject

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TrackChanges

public void TrackChanges(bool deepTracking = false)
Starts tracking property value changes for every property, optionally activating this behavior for the entire object graph.

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Parameters

  • deepTracking bool: When true, loops recursively through the object graph and calls on every object that inherits from .

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Remarks

https://stackoverflow.com/questions/2363801/what-would-be-the-best-way-to-implement-change-tracking-on-an-object