public static List <EntityChangeTracker> GetChangesMade <TEntity>(DbContext _db, TEntity theEntity) where TEntity : class, new()
{
List <EntityChangeTracker> comparisonList = new List <EntityChangeTracker>();
// Get list of entities that are marked as modified
List <DbEntityEntry> modifiedEntityList =
_db.ChangeTracker.Entries().Where(x => x.State == EntityState.Modified).ToList();
foreach (DbEntityEntry entity in modifiedEntityList)
{
if (entity.Entity == theEntity)
{
DbPropertyValues propertyValues = entity.OriginalValues;
foreach (String propertyName in propertyValues.PropertyNames)
{
object objOriginal = propertyValues[propertyName];
string originalValue = (objOriginal != null ? objOriginal.ToString() : null);
object objNew = entity.Entity.GetType().GetProperty(propertyName).GetValue(entity.Entity);
string newValue = (objNew != null ? objNew.ToString() : null);
if (originalValue != newValue)
{
EntityChangeTracker ect = new EntityChangeTracker();
ect.OriginalValue = originalValue;
ect.NewValue = newValue;
ect.PropertyName = propertyName;
comparisonList.Add(ect);
}
}
}
}
return(comparisonList);
}
