public DBChangeTrackerInfo(DbEntityEntry dbEntity, System.Data.Entity.Core.Objects.ObjectContext objContext)
{
entity = dbEntity.Entity;
currentValues = dbEntity.State == System.Data.Entity.EntityState.Deleted ? null : (DbPropertyValues)dbEntity.CurrentValues.Clone();
originalValues = dbEntity.State == System.Data.Entity.EntityState.Added ? null : (DbPropertyValues)dbEntity.OriginalValues.Clone();
state = dbEntity.State;
if (entity == null)
{
return;
}
#region GetEntityKeyValue
string tblN = entity.GetType().Name;
System.Data.Entity.Core.EntityKey key = objContext.CreateEntityKey(tblN, entity);
DbKeyMember[] km = new DbKeyMember[key.EntityKeyValues.Length];
for (int i = 0; i < key.EntityKeyValues.Length; i++)
{
km[i] = new DbKeyMember(key.EntityKeyValues[i].Key, key.EntityKeyValues[i].Value);
}
entityKey = new DbEntityKey(tblN, km);
//Tracking changed data
if (state == System.Data.Entity.EntityState.Modified && originalValues != null)
{
listRecordChanged = new List <DbRecordChangedInfo>();
foreach (var fieldProperty in originalValues.PropertyNames)
{
if (dbEntity.Property(fieldProperty).IsModified)
{
listRecordChanged.Add(new DbRecordChangedInfo(fieldProperty, originalValues[fieldProperty], currentValues[fieldProperty]));
}
}
}
#endregion
}
// <Extension>
// Public Function HasEntityKeyFirstValue(Of T As {Class, IEntityWithRelationships})(entityReference As EntityReference(Of T)) As Boolean
// Return entityReference IsNot Nothing AndAlso entityReference.EntityKey.HasFirstValue(Of Integer)()
// End Function
// <Extension>
// Public Function GetEntityKeyFirstValue(Of T As {Class, IEntityWithRelationships})(entityReference As EntityReference(Of T)) As Integer
// If entityReference IsNot Nothing Then
// Return entityReference.EntityKey.EntityKeyValues(GetEntityKeyFirstValue(Of Integer)()
// End If
// Return 0
// End Function
/// <summary>
/// ''' Gets the first entity key value
/// ''' </summary>
/// ''' <typeparam name="T"></typeparam>
/// ''' <param name="entityKey">The entity key.</param>
/// ''' <returns>the first entity key value</returns>
public static T GetFirstValue <T>(this System.Data.Entity.Core.EntityKey entityKey)
{
if (entityKey != null && entityKey.EntityKeyValues != null && entityKey.EntityKeyValues.Length > 0)
{
return((T)entityKey.EntityKeyValues.First().Value);
}
return(default(T));
}
/// <summary>
/// ''' Sets the first entity key value
/// ''' </summary>
/// ''' <typeparam name="T"></typeparam>
/// ''' <param name="entityKey">The entity key.</param>
/// ''' <param name="value">The value.</param>
public static void SetFirstValue <T>(this System.Data.Entity.Core.EntityKey entityKey, T value)
{
if (entityKey != null && entityKey.EntityKeyValues != null && entityKey.EntityKeyValues.Length > 0)
{
entityKey.EntityKeyValues.First().Value = value;
}
return;
}
public virtual int Delete(T entity)
{
try
{
var fqen = GetEntityName <T>();
object originalItem;
System.Data.Entity.Core.EntityKey key = ((IObjectContextAdapter)Dbcontext).ObjectContext.CreateEntityKey(fqen, entity);
if (((IObjectContextAdapter)Dbcontext).ObjectContext.TryGetObjectByKey(key, out originalItem))
{
((IObjectContextAdapter)Dbcontext).ObjectContext.DeleteObject(originalItem);
}
//_context.Set<T>().Attach(entity);
//_context.Entry(entity).State = EntityState.Deleted;
return(Save());
}
catch (Exception e)
{
throw;
}
}
/// <summary>
/// ''' Whether or not the entity key has a first value
/// ''' </summary>
/// ''' <typeparam name="T"></typeparam>
/// ''' <param name="entityKey">The entity key.</param>
/// ''' <returns><c>true</c> if [has first value] [the specified entity key]; otherwise, <c>false</c>.</returns>
public static bool HasFirstValue <T>(this System.Data.Entity.Core.EntityKey entityKey)
{
return(!GetFirstValue <T>(entityKey).Equals(null));
}
