private bool SaveRecord(bool prompt)
{
try {
if (_selectedRecord == null)
{
return(true);
}
FinalizeBindings();
bool newRec = _selectedRecord.IsNew();
bool modified = newRec || IsModified(_selectedRecord);
if (modified)
{
if (prompt)
{
DialogResult result = DisplayHelper.QuestionYesNoCancel(this, "Do you want to save these changes?");
if (result == DialogResult.No)
{
if (newRec)
{
RemoveRecord();
}
else
{
RefreshRecord();
}
return(true);
}
else if (result == DialogResult.Cancel)
{
return(false);
}
}
if (!ValidateAll())
{
return(false);
}
if (_selectedRecord.EntityState == EntityState.Detached)
{
_context.INVT.AddObject(_selectedRecord);
}
SetUpdateFields(_selectedRecord);
_context.SaveChanges();
EntityInstantFeedbackSource.Refresh();
ShowActionConfirmation("Record Saved");
}
return(true);
}
catch (Exception ex) {
DisplayHelper.DisplayError(this, ex);
RefreshRecord(); //pull it back from db because that is its current state
//We must also Load and rebind the related entities from the db because context.Refresh doesn't do that
SetBindings();
return(false);
}
}
private bool DeleteRecord()
{
if (_selectedRecord == null)
{
return(false);
}
try {
if (DisplayHelper.QuestionYesNo(this, "Are you sure you want to delete this record?") == DialogResult.Yes)
{
//ignoreLeaveRow and ignorePositionChange are set because when removing a record, the bindingsource_currentchanged
//and gridview_beforeleaverow events will fire as the current record is removed out from under them.
//We do not want these events to perform their usual code of checking whether there are changes in the active
//record that should be saved before proceeding, because we know we have just deleted the active record.
_ignoreLeaveRow = true;
_ignorePositionChange = true;
RemoveRecord();
if (!_selectedRecord.IsNew())
{
//Apparently a record which has just been added is not flagged for deletion by BindingSource.RemoveCurrent,
//(the EntityState remains unchanged). It seems like it is not tracked by the context even though it is, because
//the EntityState changes for modification. So if this is a deletion and the entity is not flagged for deletion,
//delete it manually.
if (_selectedRecord != null && (_selectedRecord.EntityState & EntityState.Deleted) != EntityState.Deleted)
{
_context.REGION.DeleteObject(_selectedRecord);
}
_context.SaveChanges();
}
if (GridViewLookup.DataRowCount == 0)
{
ClearBindings();
}
_ignoreLeaveRow = false;
_ignorePositionChange = false;
EntityInstantFeedbackSource.Refresh();
SetBindings();
ShowActionConfirmation("Record Deleted");
return(true);
}
else
{
return(false);
}
}
catch (Exception ex) {
DisplayHelper.DisplayError(this, ex);
_ignoreLeaveRow = false;
_ignorePositionChange = false;
RefreshRecord(); //pull it back from db because that is it's current state
//We must also Load and rebind the related entities from the db because context.Refresh doesn't do that
SetBindings();
return(false);
}
}
IInstantFeedbackSource <TProjection> IUnitOfWorkFactory <TUnitOfWork> .CreateInstantFeedbackSource <TEntity, TProjection, TPrimaryKey>(
Func <TUnitOfWork, IRepository <TEntity, TPrimaryKey> > getRepositoryFunc,
Func <IRepositoryQuery <TEntity>, IQueryable <TProjection> > projection)
{
var threadSafeProperties = new TypeInfoProxied(TypeDescriptor.GetProperties(typeof(TProjection)), null).UIDescriptors;
if (projection == null)
{
projection = x => x as IQueryable <TProjection>;
}
var source = new EntityInstantFeedbackSource((GetQueryableEventArgs e) => e.QueryableSource = projection(getRepositoryFunc(createUnitOfWork())))
{
KeyExpression = getRepositoryFunc(createUnitOfWork()).GetPrimaryKeyPropertyName(),
};
return(new InstantFeedbackSource <TProjection>(source, threadSafeProperties));
}
IInstantFeedbackSource <TProjection> IUnitOfWorkFactory <TUnitOfWork> .CreateInstantFeedbackSource <TEntity, TProjection, TPrimaryKey>(
Func <TUnitOfWork, IRepository <TEntity, TPrimaryKey> > getRepositoryFunc,
Func <IRepositoryQuery <TEntity>, IQueryable <TProjection> > projection)
{
var threadSafeProperties = new TypeInfoProxied(TypeDescriptor.GetProperties(typeof(TProjection)), null).UIDescriptors;
if (projection == null)
{
projection = x => x as IQueryable <TProjection>;
}
var keyProperties = ExpressionHelper.GetKeyProperties(getRepositoryFunc(createUnitOfWork()).GetPrimaryKeyExpression);
var keyExpression = keyProperties.Select(p => p.Name).Aggregate((l, r) => l + ";" + r);
var source = new EntityInstantFeedbackSource((DevExpress.Data.Linq.GetQueryableEventArgs e) => e.QueryableSource = projection(getRepositoryFunc(createUnitOfWork())))
{
KeyExpression = keyExpression
};
return(new InstantFeedbackSource <TProjection>(source, threadSafeProperties));
}
public InstantFeedbackSource(EntityInstantFeedbackSource source, PropertyDescriptorCollection threadSafeProperties)
{
this.source = source;
this.threadSafeProperties = threadSafeProperties;
}
private bool SaveRecord(bool prompt)
{
try {
if (_selectedRecord == null)
{
return(true);
}
FinalizeBindings();
bool newRec = _selectedRecord.IsNew();
bool modified = newRec || IsModified(_selectedRecord);
if (modified)
{
if (prompt)
{
DialogResult result = DisplayHelper.QuestionYesNoCancel(this, "Do you want to save these changes?");
if (result == DialogResult.No)
{
if (newRec)
{
RemoveRecord();
}
else
{
RefreshRecord();
}
return(true);
}
else if (result == DialogResult.Cancel)
{
return(false);
}
}
if (!ValidateAll())
{
return(false);
}
if (_selectedRecord.EntityState == EntityState.Detached)
{
_context.WAYPOINT.AddObject(_selectedRecord);
}
_context.SaveChanges();
EntityInstantFeedbackSource.Refresh();
ShowActionConfirmation("Record Saved");
}
return(true);
}
catch (Exception ex) {
var objectStateManager = _context.ObjectStateManager;
var fieldInfo = objectStateManager.GetType().GetField("_entriesWithConceptualNulls", BindingFlags.Instance | BindingFlags.NonPublic);
var conceptualNulls = fieldInfo.GetValue(objectStateManager);
DisplayHelper.DisplayError(this, ex);
RefreshRecord(); //pull it back from db because that is its current state
//We must also Load and rebind the related entities from the db because context.Refresh doesn't do that
SetBindings();
return(false);
}
}
