public MainViewModel(IBooksRepository booksRepository) : this()
{
if (IsInDesignMode)
{
return;
}
_booksRepository = booksRepository;
SaveCommand = new RelayCommand(SaveChanges);
LoadDataCommand = new RelayCommand(LoadData);
Books.CollectionChanged += (sender, e) =>
{
if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
var book = item as BookViewModel;
if (book != null)
{
book.IsNew = true;
}
}
}
};
BooksQueriable = _booksRepository.GetAllBooksAsQueryable();
QueriableDataSource = new LinqServerModeDataSource()
{
QueryableSource = BooksQueriable
};
}
protected override bool LoadData()
{
dataContext = DatabaseHelper.GetContext();
if (dataContext == null)
{
return(false);
}
try {
LinqServerModeDataSource dataSource = new LinqServerModeDataSource();
dataSource.QueryableSource = dataContext.Sales;
demo.pivotGrid.SetDataSourceAsync(dataSource);
}
catch {
return(false);
}
return(true);
}
protected object GetDataSource()
{
int i = (Session["DataSource"] != null) ? (int)Session["DataSource"] : 0;
switch (i)
{
case 1:
{
LinqServerModeDataSource lnsource = new LinqServerModeDataSource {
ContextTypeName = "NorthwindModel.NorthwindEntities", TableName = "Invoices"
};
lnsource.Selecting += lnsource_Selecting;
return(lnsource);
}
default:
return(new EntityServerModeSource {
QueryableSource = new NorthwindEntities().Orders, KeyExpression = "OrderID"
});
}
}
