public static IEnumerable <T> GetEntities <T>(this DbChangeTracker tracker)
{
var entrySet = tracker.Entries();
var entities = tracker
.Entries()
.Where(entry => entry.State != EntityState.Detached && entry.Entity != null)
.Select(entry => entry.Entity).OfType <T>();
return(entities);
}
public void BeginTrackChanges(DbChangeTracker changeTracker)
{
_changeSet = new ChangeSet()
{
ChangeEntities = new List<ChangeEntity>()
};
IEnumerable<DbEntityEntry> changes = changeTracker.Entries().Where(e => e.State == EntityState.Deleted || e.State == EntityState.Modified).ToArray();
AddModifiedEntities(changes);
_addedEntities = changeTracker.Entries().Where(e => e.State == EntityState.Added).ToArray();
}
private static void AntiXssEncode(DbChangeTracker tracker)
{
var addedModifiedEntries = tracker.Entries().Where(e => e.State == EntityState.Added | e.State == EntityState.Modified);
foreach (var entry in addedModifiedEntries)
{
var entity = entry.Entity;
var type = entity.GetType();
var properties = type.GetProperties();
foreach (var property in properties)
{
if (property.PropertyType != typeof(string))
{
continue;
}
var value = property.GetValue(entity, null);
if (value == null)
{
continue;
}
value = AntiXssEncoder.HtmlEncode(value.ToString(), true);
property.SetValue(entity, value, null);
}
}
}
public void ForEntities(DbChangeTracker tracker)
{
var ents = tracker.Entries().Where(te => te.State == EntityState.Added || te.State == EntityState.Modified).ToLookup(te => te.Entity.GetType());
foreach (var e in ents)
{
foreach (var p in e.Key.GetProperties(BindingFlags.DeclaredOnly |
BindingFlags.Public |
BindingFlags.Instance).Where(p => p.PropertyType == typeof(string)))
{
foreach (var ent in e)
{
string val = ent.CurrentValues.GetValue <string>(p.Name);
if (val != null)
{
val = val.Trim();
if (val != string.Empty)
{
val = Sanitizer.Sanitize(val);
}
ent.CurrentValues[p.Name] = val;
}
}
}
}
}
public void ForEntities(DbChangeTracker tracker)
{
var ents = tracker.Entries().Where(te => te.State == EntityState.Added || te.State == EntityState.Modified).ToLookup(te => te.Entity.GetType());
foreach (var e in ents)
{
foreach (var p in e.Key.GetProperties(BindingFlags.DeclaredOnly |
BindingFlags.Public |
BindingFlags.Instance).Where(p=>p.PropertyType == typeof(string)))
{
foreach (var ent in e)
{
string val = ent.CurrentValues.GetValue<string>(p.Name);
if (val != null)
{
val = val.Trim();
if (val != string.Empty)
{
val = Sanitizer.Sanitize(val);
}
ent.CurrentValues[p.Name] = val;
}
}
}
}
}
/// <summary>
/// Sets the LastUpdatedBy property value to be the logged in user's Id.
/// </summary>
/// <param name="tracker">The DbChangeTracker from the DbContext.</param>
/// <param name="userId">The UserId of the logged in user. This is different than the user that may be in the connection string.</param>
public static void HandleAuditableLastUpdatedBy(DbChangeTracker tracker, int userId)
{
foreach (var auditableEntity in tracker.Entries <IAuditableLastUpdatedBy>().Where(auditableEntity => auditableEntity.State == EntityState.Modified))
{
auditableEntity.Entity.LastUpdatedBy = userId;
}
}
/// <summary>
/// Sets CreateDate to DateTime.Now.
/// </summary>
/// <param name="tracker">The DbChangeTracker from the DbContext.</param>
public static void HandleAuditableCreateDate(DbChangeTracker tracker)
{
foreach (var auditableEntity in tracker.Entries <IAuditableCreateDate>().Where(auditableEntity => auditableEntity.State == EntityState.Added))
{
auditableEntity.Entity.CreateDate = DateTime.Now;
}
}
/// <summary>
/// Sets LastUpdated to DateTime.Now.
/// </summary>
/// <param name="tracker">The DbChangeTracker from the DbContext.</param>
public static void HandleAuditableLastUpdated(DbChangeTracker tracker)
{
foreach (var auditableEntity in tracker.Entries <IAuditableLastUpdatedDate>().Where(auditableEntity => auditableEntity.State == EntityState.Modified))
{
auditableEntity.Entity.LastUpdated = DateTime.Now;
}
}
private static void AntiXssEncode(DbChangeTracker tracker)
{
var addedModifiedEntries = tracker.Entries().Where(e => e.State == EntityState.Added | e.State == EntityState.Modified);
foreach (var entry in addedModifiedEntries)
{
var entity = entry.Entity;
var type = entity.GetType();
var properties = type.GetProperties();
foreach (var property in properties)
{
if (property.PropertyType != typeof(string))
{
continue;
}
var value = property.GetValue(entity, null);
if (value == null)
{
continue;
}
value = AntiXssEncoder.HtmlEncode(value.ToString(), true);
property.SetValue(entity, value, null);
}
}
}
public static void RejectChanges(this DbChangeTracker changeTracker)
{
foreach (var entry in changeTracker.Entries())
{
switch (entry.State)
{
case EntityState.Modified:
entry.State = EntityState.Unchanged;
break;
case EntityState.Added:
entry.State = EntityState.Detached;
break;
case EntityState.Detached:
break;
case EntityState.Unchanged:
break;
case EntityState.Deleted:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
public void ChangeTrackerTest(DbChangeTracker tracker)
{
DbChangeTracker changeTracker = this.ChangeTracker;
System.Data.Entity.Infrastructure.DbChangeTracker fullyQualifiedChangeTracker = this.ChangeTracker;
var entries = changeTracker.Entries();
}
private void buttonSave_Click(object sender, RoutedEventArgs e)
{
try
{
int effected = 0;
DbChangeTracker tracker = entity.ChangeTracker;
IEnumerable <DbEntityEntry> entries = tracker.Entries();
Console.WriteLine(entity.Employees.Count());
//dataGrid.ItemsSource = entries.ToList();
if (tracker.HasChanges())
{
IEnumerable <DbEntityEntry> modifiedEntries = entries.Where(n => n.State == System.Data.Entity.EntityState.Modified);
List <Employee> changes = new List <Employee>();
foreach (DbEntityEntry entityEntry in modifiedEntries)
{
//DbPropertyValues oldValues = entityEntry.GetDatabaseValues();
DbPropertyValues newValues = entityEntry.CurrentValues;
Employee employee = (Employee)newValues.ToObject();
changes.Add(employee);
}
IEnumerable <DbEntityEntry> deletedEntries = entries.Where(n => n.State == System.Data.Entity.EntityState.Deleted || n.State == System.Data.Entity.EntityState.Detached);
List <Employee> deletes = new List <Employee>();
foreach (DbEntityEntry entityEntry in deletedEntries)
{
//DbPropertyValues oldValues = entityEntry.GetDatabaseValues();
DbPropertyValues newValues = entityEntry.CurrentValues;
Employee employee = (Employee)newValues.ToObject();
deletes.Add(employee);
}
IEnumerable <DbEntityEntry> addedEntries = entries.Where(n => n.State == System.Data.Entity.EntityState.Added);
List <Employee> adds = new List <Employee>();
foreach (DbEntityEntry entityEntry in addedEntries)
{
//DbPropertyValues oldValues = entityEntry.GetDatabaseValues();
DbPropertyValues newValues = entityEntry.CurrentValues;
Employee employee = (Employee)newValues.ToObject();
adds.Add(employee);
}
ItemChanges itemChanges = new ItemChanges();
itemChanges.Topmost = true;
itemChanges.dataGridChanges.ItemsSource = changes.ToList();
itemChanges.dataGridChangesDelete.ItemsSource = deletes.ToList();
itemChanges.dataGridChangesNew.ItemsSource = adds.ToList();
itemChanges.ShowDialog();
if (itemChanges.IsAccepted)
{
effected = entity.SaveChanges();
MessageBox.Show("Success to update data: " + effected.ToString() + " item(s).");
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private static void ShowTrackedObjects(string title, DbChangeTracker tracker)
{
Console.WriteLine(title);
foreach (var item in tracker.Entries <Racer>())
{
Console.WriteLine("{0}, state: {1}", item.Entity.LastName, item.State);
}
Console.WriteLine();
}
private static void DisplayTrackedEntities(DbChangeTracker changeTracker)
{
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
Console.WriteLine("Entity Name: {0}", entry.Entity.GetType().FullName);
Console.WriteLine("Status: {0}", entry.State);
}
}
public void CheckChangeTracking(DbChangeTracker changeTracker)
{
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
var name = entry.Entity.GetType().FullName;
var state = entry.State;
}
}
public static string[] GetChangedEntityNames(this DbChangeTracker changeTracker)
{
return(changeTracker.Entries()
.Where(x => x.State == EntityState.Added ||
x.State == EntityState.Modified ||
x.State == EntityState.Deleted)
.Select(x => ObjectContext.GetObjectType(x.Entity.GetType()).FullName)
.Distinct()
.ToArray());
}
public void BeforeSave(DbChangeTracker tracker)
{
foreach (var entry in tracker.Entries<ITimestamped>()
.Where(x => x.State == EntityState.Added && x.Entity.CreatedAt == default(DateTime)))
{
var now = DateTime.UtcNow;
entry.Entity.CreatedAt = now;
entry.Entity.UpdatedAt = now;
}
}
private static void DisplayTrackedEntities(SchoolDBEntities context)
{
Console.WriteLine("Context is tracking {0} entities.", context.ChangeTracker.Entries().Count());
DbChangeTracker changeTracker = context.ChangeTracker;
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
Console.WriteLine("Entity Name: {0}", entry.Entity.GetType().FullName);
Console.WriteLine("Status: {0}", entry.State);
}
}
public static void SaveDefaultPropertiesChanges(DbChangeTracker changeTracker)
{
foreach (var entry in changeTracker.Entries()
.Where(e => e.State == EntityState.Added))
{
var exists = entry.Entity.GetType().GetProperty("DataCriacao");
if (exists != null)
{
entry.Property("DataCriacao").CurrentValue = DateTime.Now;
}
}
foreach (var entry in changeTracker.Entries()
.Where(e => e.State == EntityState.Modified))
{
var exists = entry.Entity.GetType().GetProperty("DataAlteracao");
if (exists != null)
entry.Property("DataAlteracao").CurrentValue = DateTime.Now;
}
}
/// <summary>
/// Adds entries to the audit models and returns the RecentUpdateDb. As SaveChanges call is required to commit the changes from the caller.
/// </summary>
/// <param name="changeTracker"></param>
/// <param name="userId"></param>
/// <returns></returns>
public AuditModelContext AuditChanges(DbChangeTracker changeTracker, string userId)
{
//Record changes into the Audit DB.
AuditModelContext recentUpdateDb = new AuditModelContext();
//Create an exclusion list for audit
string[] excludedFromAudit = new string[] { "ModifiedById", "Modified", "CreatedById", "Created" };
IEnumerable <DbEntityEntry> auditEntries = changeTracker.Entries().Where(x => x.Entity is BaseBaseModel && (x.State == EntityState.Modified));
foreach (DbEntityEntry entry in auditEntries)
{
if (entry.GetType().GetCustomAttribute(typeof(NoAuditAttribute)) == null)
{
var currentValues = entry.CurrentValues;
var databaseValues = entry.GetDatabaseValues();
if (currentValues != null)
{
foreach (string propertyName in currentValues.PropertyNames.Except(excludedFromAudit))
{
if (!string.IsNullOrWhiteSpace(propertyName))
{
var propertyValue = databaseValues.GetValue <object>(propertyName);
//Use nullPlaceholder for equals Operation.
object originalValue = propertyValue;
object currentValue = currentValues[propertyName];
//Audit changes and non-ReadOnly Fields.
if (entry.Entity.GetType().GetProperty(propertyName).GetCustomAttribute(typeof(TFOF.Areas.Core.Attributes.ReadOnlyAttribute)) == null)
{
recentUpdateDb.Add(
ObjectContext.GetObjectType(entry.Entity.GetType()).Name,
((BaseBaseModel)entry.Entity).GetPrimaryKey(),
propertyName,
originalValue,
currentValue,
userId
);
}
}
}
}
}
}
return(recentUpdateDb);
}
private static void ProcessContextAudit(DbChangeTracker tracker)
{
var entriesChangedWithBaseModel = tracker.Entries().Where(e => e.Entity is BaseModel && (e.State == EntityState.Added | e.State == EntityState.Modified));
foreach (var entry in entriesChangedWithBaseModel)
{
var auditEntity = (BaseModel)entry.Entity;
if (entry.State == EntityState.Added)
{
auditEntity.CreatedOn = DateTime.Now;
}
auditEntity.UpdatedOn = DateTime.Now;
}
}
public static void TrackChanges(DbChangeTracker changeTracker)
{
foreach (var entry in changeTracker.Entries())
{
var entity = (IBaseEntity)entry.Entity;
switch (entry.State)
{
case EntityState.Added:
entity.Created = DateTime.Now;
entity.Updated = DateTime.Now;
break;
case EntityState.Modified:
entity.Updated = DateTime.Now;
break;
}
}
}
private void DisplayTrackedEntities(DbChangeTracker changeTracker)
{
Console.WriteLine("");
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
Console.WriteLine("Entity Name: {0}", entry.Entity.GetType().FullName);
Console.WriteLine("Status: {0}", entry.State);
if (entry.State == EntityState.Modified)
{
Console.WriteLine();
}
}
Console.WriteLine("");
Console.WriteLine("---------------------------------------");
}
public static void DisplayTrackedEntities(string label, DbChangeTracker changeTracker)
{
Console.WriteLine(label + ":");
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
Console.WriteLine("Entity Name: {0} [{1}]\tStatus: {2}",
entry.Entity.GetType().FullName, entry.Entity.GetType().Name, entry.State);
switch (entry.State)
{
case System.Data.Entity.EntityState.Added:
{
DisplayDBPropertyValues(entry.CurrentValues, null);
break;
}
case System.Data.Entity.EntityState.Deleted:
{
DisplayDBPropertyValues(entry.CurrentValues, entry.OriginalValues);
break;
}
case System.Data.Entity.EntityState.Modified:
{
DisplayDBPropertyValues(entry.CurrentValues, entry.OriginalValues);
break;
}
case System.Data.Entity.EntityState.Unchanged:
{
// DisplayDBPropertyValues(entry.CurrentValues, entry.OriginalValues);
break;
}
default:
{
break;
}
}
}
Console.WriteLine("---------------------------------------");
}
private static void DisplayTrackedEntities(DbChangeTracker changeTracker)
{
Debug.WriteLine("---------------------------------------------------------------------------------------------------------------------");
var entries = changeTracker.Entries();
foreach (var entry in entries)
{
Debug.WriteLine($"Entity Name: {entry.Entity.GetType().FullName}");
Debug.WriteLine($"Status: {entry.State}");
if (entry.State != EntityState.Detached)//Durumu Detached dışındaki işlemler
{
LiteDbSync(entry);
}
}
Debug.WriteLine("");
Debug.WriteLine("---------------------------------------------------------------------------------------------------------------------");
}
public static void ApplyAuditInformation(this DbChangeTracker changeTracker)
{
foreach (var entry in changeTracker.Entries())
{
if (!(entry.Entity is BaseEntity baseAudit))
{
continue;
}
var now = DateTime.UtcNow;
switch (entry.State)
{
case EntityState.Modified:
baseAudit.Created = now;
baseAudit.Modified = now;
break;
case EntityState.Added:
baseAudit.Created = now;
break;
}
}
}
public EntityAudit[] Records(DbChangeTracker tracker)
{
return(tracker.Entries().Where(p => p.State == EntityState.Deleted || p.State == EntityState.Modified).Select(x => GetRecordsForChange(x)).ToArray());
}
public IEnumerable <IDbEntityEntryBase> Entries()
{
return(_changeTracker.Entries().Select(entry => new DbEntityEntryBase(entry)).AsEnumerable());
}
public static TicketHistory GenerateTicketHistory(ApplicationDbContext DbContext, Ticket ticket, ApplicationUser user)
{
// Get the props that have been modified, add to new TicketHistory, return it.
DbChangeTracker changeTracker = DbContext.ChangeTracker;
var entries = changeTracker.Entries();
var history = new TicketHistory();
history.User = user;
if (changeTracker.HasChanges())
{
var modifiedEntries = (from prop in entries
where prop.State == System.Data.Entity.EntityState.Modified
select prop).FirstOrDefault();
var historyDetails = (from propName in modifiedEntries.OriginalValues.PropertyNames
let valA = modifiedEntries.OriginalValues[propName]?.ToString()
let valB = modifiedEntries.CurrentValues[propName]?.ToString()
where valA != valB && (valA == null || !valA.Equals(valB)) && propName != "DateUpdated"
select new TicketHistoryDetails()
{
OldValue = valA,
NewValue = valB,
Property = propName
}).ToList();
history.DateUpdated = (from propName in modifiedEntries.OriginalValues.PropertyNames
where propName == "DateUpdated"
select(DateTime) modifiedEntries.CurrentValues[propName]).FirstOrDefault();
// Converting Ticket status, priority, and types from their id's to more the more user friendly names.
for (int i = 0; i < historyDetails.Count(); i++)
{
if (historyDetails[i].Property == "TicketStatusId")
{
var statuses = DbContext.TicketStatuses.ToList();
historyDetails[i].Property = "Ticket Status";
var parsedIdOld = int.Parse(historyDetails[i].OldValue);
historyDetails[i].OldValue = statuses.Find(p => p.Id == parsedIdOld).Name;
var parsedIdNew = int.Parse(historyDetails[i].NewValue);
historyDetails[i].NewValue = statuses.Find(p => p.Id == parsedIdNew).Name;
}
else if (historyDetails[i].Property == "TicketPriorityId")
{
var priorities = DbContext.TicketPriorities.ToList();
historyDetails[i].Property = "Ticket Priority";
var parsedIdOld = int.Parse(historyDetails[i].OldValue);
historyDetails[i].OldValue = priorities.Find(p => p.Id == parsedIdOld).Name;
var parsedIdNew = int.Parse(historyDetails[i].NewValue);
historyDetails[i].NewValue = priorities.Find(p => p.Id == parsedIdNew).Name;
}
else if (historyDetails[i].Property == "TicketTypeId")
{
var types = DbContext.TicketTypes.ToList();
historyDetails[i].Property = "Ticket Type";
var parsedIdOld = int.Parse(historyDetails[i].OldValue);
historyDetails[i].OldValue = types.Find(p => p.Id == parsedIdOld).Name;
var parsedIdNew = int.Parse(historyDetails[i].NewValue);
historyDetails[i].NewValue = types.Find(p => p.Id == parsedIdNew).Name;
}
else if (historyDetails[i].Property == "AssignedToId")
{
var users = DbContext.Users.ToList();
var devUserNew = users.Find(p => p.Id == historyDetails[i].NewValue);
var devUserOld = users.Find(p => p.Id == historyDetails[i].OldValue);
historyDetails[i].Property = "Dev Assigned";
historyDetails[i].OldValue = devUserOld?.DisplayName;
historyDetails[i].NewValue = devUserNew?.DisplayName;
if (historyDetails[i].OldValue is null)
{
historyDetails[i].OldValue = "No dev assigned";
}
if (historyDetails[i].NewValue is null)
{
historyDetails[i].NewValue = "No dev assigned";
}
}
else if (historyDetails[i].Property == "ProjectId")
{
var projects = DbContext.Projects.ToList();
var devUserNew = projects.Find(p => p.Id.ToString() == historyDetails[i].NewValue);
var devUserOld = projects.Find(p => p.Id.ToString() == historyDetails[i].OldValue);
historyDetails[i].Property = "Assigned Project";
historyDetails[i].OldValue = devUserOld.Title;
historyDetails[i].NewValue = devUserNew.Title;
}
}
foreach (var detail in historyDetails)
{
history.TicketHistoryDetails.Add(detail);
}
}
// Ensures an empty history cannot be created.
if (history.TicketHistoryDetails.Any())
{
return(history);
}
else
{
return(null);
}
}
public override int SaveChanges()
{
if (SaveAudits == false)
{
return(base.SaveChanges());
}
var addedAuditedEntities = ChangeTracker.Entries()
.Where(p => p.State == EntityState.Added)
.Select(p => p.Entity).ToList();
var modifiedAuditedEntities = ChangeTracker.Entries()
.Where(p => p.State == EntityState.Modified)
.Select(p => p.Entity).ToList();
var deletedAuditedEntities = ChangeTracker.Entries()
.Where(p => p.State == EntityState.Deleted)
.Select(p => p.Entity).ToList();
var unmo = ChangeTracker.Entries()
.Where(p => p.State == EntityState.Added).ToList();
var now = DateTime.UtcNow;
// Serializer settings
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.ContractResolver = new CustomResolver();
settings.PreserveReferencesHandling = PreserveReferencesHandling.None;
settings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
settings.Formatting = Formatting.Indented;
foreach (var modified in modifiedAuditedEntities)
{
var keys = GetKey(modified, this).Split(',');
object[] keyvalues = new object[keys.Count()];
for (int i = 0; i < keys.Count(); i++)
{
keyvalues[i] = modified.GetType().GetProperty(keys[i]).GetValue(modified);
}
Trailer asdf = new Trailer();
var entity2 = asdf.Set(modified.GetType()).Find(keyvalues);
AuditTrail trail = new AuditTrail()
{
Action = EntityObjectState.Modified,
AuditDateTime = now,
EntityType = ObjectContext.GetObjectType(modified.GetType()).Name,
OriginalEntity = JsonConvert.SerializeObject(entity2, settings),
NewEntity = JsonConvert.SerializeObject(modified, settings),
UserId = (string)User.UserId,
};
this.AuditTrails.Add(trail);
}
var returnvalue = base.SaveChanges();
foreach (var added in addedAuditedEntities)
{
AuditTrail trail = new AuditTrail()
{
Action = EntityObjectState.Added,
AuditDateTime = now,
EntityType = added.GetType().Name,
OriginalEntity = JsonConvert.SerializeObject(added, settings),
UserId = (string)User.UserId,
};
this.AuditTrails.Add(trail);
}
foreach (var deleted in deletedAuditedEntities)
{
AuditTrail trail = new AuditTrail()
{
Action = EntityObjectState.Deleted,
AuditDateTime = now,
EntityType = ObjectContext.GetObjectType(deleted.GetType()).Name,
OriginalEntity = JsonConvert.SerializeObject(deleted, settings),
UserId = (string)User.UserId,
};
this.AuditTrails.Add(trail);
}
base.SaveChanges();
return(returnvalue);
}
private static void ProcessContextAudit(DbChangeTracker tracker)
{
var entriesChangedWithBaseModel = tracker.Entries().Where(e => e.Entity is BaseModel && (e.State == EntityState.Added | e.State == EntityState.Modified));
foreach (var entry in entriesChangedWithBaseModel)
{
var auditEntity = (BaseModel) entry.Entity;
if (entry.State == EntityState.Added)
{
auditEntity.CreatedOn = DateTime.Now;
}
auditEntity.UpdatedOn = DateTime.Now;
}
}
public void BeforeSave(DbChangeTracker tracker)
{
foreach (var entry in tracker.Entries<ITimestamped>()
.Where(x => x.State == EntityState.Modified))
entry.Entity.UpdatedAt = DateTime.Now.ToUniversalTime();
}