public RecordNavigationCommand(Action<object, RecordNavigation> execute, RecordNavigation navigation, Func<object, RecordNavigation, bool> canNavigate, Predicate<object> canExecute)
{
if (execute == null)
{
throw new ArgumentNullException("execute");
}
if (navigation == RecordNavigation.None)
{
throw new ArgumentException("navigation parameter cannot be None");
}
if (canNavigate == null)
{
throw new ArgumentNullException("canNavigate");
}
_execute = execute;
Navigation = navigation;
_canNavigate = canNavigate;
_canExecute = canExecute;
}
private void PerformNavigation(object parameter, RecordNavigation navigation)
{
if (navigation == RecordNavigation.Position)
{
int position;
if (!((parameter is TextBox) && int.TryParse((parameter as TextBox).Text, out position)))
{
Set(() => CurrentPosition, CurrentPosition, true);
return;
}
if (!(parameter is TextBox) && !int.TryParse(parameter.ToString(), out position))
{
Set(() => CurrentPosition, CurrentPosition, true);
return;
}
base.PerformNavigation(position, navigation);
}
else
{
base.PerformNavigation(0, navigation);
}
}
private bool CanNavigate(object parameter, RecordNavigation navigation)
{
if (navigation == RecordNavigation.Position)
{
int dummy;
return NavigationsEnabled.Contains(navigation) &&
parameter is TextBox ||
int.TryParse((parameter as TextBox).Text, out dummy);
}
return NavigationsEnabled.Contains(navigation);
}
private void NavigateRecord(RecordNavigation navigation)
{
SalesOrder queryResult;
var currSalesNo = 1;
var expectedSalesNo = string.Empty;
if (string.IsNullOrEmpty(lblSalesNo.Text))
{
if (navigation == RecordNavigation.First || navigation == RecordNavigation.Previous || navigation == RecordNavigation.Next)
{
navigation = RecordNavigation.First;
}
else
{
navigation = RecordNavigation.Last;
}
}
else
{
currSalesNo = Convert.ToInt32(lblSalesNo.Text.Substring(lblSalesNo.Text.Trim().Length - 6));
}
switch (navigation)
{
case RecordNavigation.First:
queryResult = _uow.Repository.GetAll().OrderBy(s => s.SalesNo).FirstOrDefault();
break;
case RecordNavigation.Previous:
queryResult = null;
if (currSalesNo > 1)
{
expectedSalesNo = string.Concat("SO-", (currSalesNo - 1).ToString().PadLeft(6, '0'));
queryResult = _uow.Repository.GetAll().Where(s => s.SalesNo == expectedSalesNo).FirstOrDefault();
}
break;
case RecordNavigation.Next:
queryResult = null;
var lastRec = _uow.Repository.GetAll().OrderByDescending(s => s.SalesNo).FirstOrDefault();
if (lastRec.Id != txtSalesOrderId.Text.Trim())
{
expectedSalesNo = string.Concat("SO-", (currSalesNo + 1).ToString().PadLeft(6, '0'));
queryResult = _uow.Repository.GetAll().Where(s => s.SalesNo == expectedSalesNo).FirstOrDefault();
}
break;
case RecordNavigation.Last:
queryResult = _uow.Repository.GetAll().OrderByDescending(s => s.SalesNo).FirstOrDefault();
break;
default:
CommonMessageHelper.ContactAdminError();
return;
}
if (queryResult != null)
{
LoadDataItem(queryResult);
}
SetUIButtonGroup();
}
public RecordNavigationCommand(Action<object, RecordNavigation> execute, RecordNavigation navigation, Func<object, RecordNavigation, bool> canNavigate)
: this(execute, navigation, canNavigate, null)
{
}