private async void DeleteBook()
{
try
{
ErrorMsgVisibility = Visibility.Collapsed;
if (SelectedBook == null)
{
ErrorMsg = Properties.Resources.SelectBookErrorMsg;
ErrorMsgVisibility = Visibility.Visible;
return;
}
var tx = AllOrderData.FirstOrDefault(t => t.BookId == SelectedBook.BookId && t.HasBook == 1);
///if the selected book has already been taken it will restrict the user from deleting it.
///User can delete this book only when all the book has returned or the user which has this book is deleted.
if (tx != null)
{
ErrorMsg = "Cannot Delete this book.Someuser owns it\n Please delete that user or return the book";
ErrorMsgVisibility = Visibility.Visible;
return;
}
await _dataAccess.DeleteData(SelectedBook, Properties.Resources.DeleteBook);
_log.Message("Deleteing Book having BookId: " + SelectedBook.BookId);
GetBooks();
InvokeBookUpdate();
ClearAllField();
}
catch (System.Data.SqlClient.SqlException ex)
{
_log.Error(ex);
}
}
private async void GetAllOrders()
{
Task <List <CheckOutModel> > task = Task.Run <List <CheckOutModel> >(() => {
var t = _allPastOrderDataAccess.GetAllOrderData(Properties.Resources.GetAllOrders);
return(t);
});
_log.Message("Getting All Orders Details from the database");
var orderCollection = await task;
AllOrderData.Clear();
orderCollection.ForEach(_order => AllOrderData.Add(_order));
}
