/// <summary>
/// Adding new tag into database.
/// </summary>
/// <param name="newTag">New tag entity.</param>
/// <returns>ID for created tag.</returns>
public int AddTag(Tag newTag)
{
using (PhotoCollectionDatabaseEntities context = new PhotoCollectionDatabaseEntities(_connectionString))
{
newTag.ID = context.Tags.NextId(p => p.ID);
context.Tags.AddObject(newTag);
context.SaveChanges();
return newTag.ID;
}
}
/// <summary>
/// Adds the template tag.
/// </summary>
/// <returns>Sample tag ID.</returns>
public int AddTemplateTag()
{
using (PhotoCollectionDatabaseEntities context = new PhotoCollectionDatabaseEntities(_connectionString))
{
Tag tag = new Tag();
tag.ID = context.Tags.NextId(t => t.ID);
tag.IconPath = "none";
tag.CreationDate = System.Convert.ToDateTime(System.DateTime.Now);
tag.Name = "TemporaryTag";
tag.ParentID = null;
context.Tags.AddObject(tag);
context.SaveChanges();
return tag.ID;
}
}
private void FixupTags1(Tag previousValue)
{
// This is the principal end in an association that performs cascade deletes.
// Update the event listener to refer to the new dependent.
if (previousValue != null)
{
ChangeTracker.ObjectStateChanging -= previousValue.HandleCascadeDelete;
}
if (Tags1 != null)
{
ChangeTracker.ObjectStateChanging += Tags1.HandleCascadeDelete;
}
if (IsDeserializing)
{
return;
}
if (previousValue != null && ReferenceEquals(previousValue.Tag1, this))
{
previousValue.Tag1 = null;
}
if (Tags1 != null)
{
Tags1.Tag1 = this;
}
if (ChangeTracker.ChangeTrackingEnabled)
{
if (ChangeTracker.OriginalValues.ContainsKey("Tags1")
&& (ChangeTracker.OriginalValues["Tags1"] == Tags1))
{
ChangeTracker.OriginalValues.Remove("Tags1");
}
else
{
ChangeTracker.RecordOriginalValue("Tags1", previousValue);
// This is the principal end of an identifying association, so the dependent must be deleted when the relationship is removed.
// If the current state of the dependent is Added, the relationship can be changed without causing the dependent to be deleted.
if (previousValue != null && previousValue.ChangeTracker.State != ObjectState.Added)
{
previousValue.MarkAsDeleted();
}
}
if (Tags1 != null && !Tags1.ChangeTracker.ChangeTrackingEnabled)
{
Tags1.StartTracking();
}
}
}
private void FixupTag1(Tag previousValue)
{
if (IsDeserializing)
{
return;
}
if (previousValue != null && ReferenceEquals(previousValue.Tags1, this))
{
previousValue.Tags1 = null;
}
if (Tag1 != null)
{
Tag1.Tags1 = this;
ID = Tag1.ID;
}
if (ChangeTracker.ChangeTrackingEnabled)
{
if (ChangeTracker.OriginalValues.ContainsKey("Tag1")
&& (ChangeTracker.OriginalValues["Tag1"] == Tag1))
{
ChangeTracker.OriginalValues.Remove("Tag1");
}
else
{
ChangeTracker.RecordOriginalValue("Tag1", previousValue);
}
if (Tag1 != null && !Tag1.ChangeTracker.ChangeTrackingEnabled)
{
Tag1.StartTracking();
}
}
}
private void FixupTag(Tag previousValue)
{
if (IsDeserializing)
{
return;
}
if (previousValue != null && previousValue.Tags2Photos.Contains(this))
{
previousValue.Tags2Photos.Remove(this);
}
if (Tag != null)
{
if (!Tag.Tags2Photos.Contains(this))
{
Tag.Tags2Photos.Add(this);
}
TagID = Tag.ID;
}
if (ChangeTracker.ChangeTrackingEnabled)
{
if (ChangeTracker.OriginalValues.ContainsKey("Tag")
&& (ChangeTracker.OriginalValues["Tag"] == Tag))
{
ChangeTracker.OriginalValues.Remove("Tag");
}
else
{
ChangeTracker.RecordOriginalValue("Tag", previousValue);
}
if (Tag != null && !Tag.ChangeTracker.ChangeTrackingEnabled)
{
Tag.StartTracking();
}
}
}
/// <summary>
/// Add a tag to database.
/// </summary>
/// <param name="tagName">Body of a tag.</param>
/// <returns>Returns true if successful.</returns>
public static bool AddTag(string tagName)
{
TagsDataSource db = new TagsDataSource(ConnectionStringHelper.GetActualConnectionString());
List<Tag> allTags = db.GetAllTags();
Tag toAdd = new Tag();
// If list is empty skip some steps.
if (allTags.Count == 0)
{
toAdd.Name = tagName;
toAdd.CreationDate = System.DateTime.Now;
db.AddTag(toAdd);
return true;
}
// If already exists returning false.
Tag findResult = allTags.Find((temporary) => temporary.Name == tagName);
if (findResult != null)
{
return false;
}
toAdd.Name = tagName;
toAdd.CreationDate = System.DateTime.Now;
db.AddTag(toAdd);
return true;
}