public static Collections.VirtualList <TEntity> ToVirtualResultLazy <TEntity>(this Colosoft.Query.Queryable queryable, int pageSize = 0, string countExpression = null, string uiContext = null, Colosoft.Query.IQueryResultBindStrategy bindStrategy = null, Colosoft.Query.IQueryResultObjectCreator objectCreator = null) where TEntity : class
{
queryable.Require("queryable").NotNull();
Collections.VirtualListLoader <TEntity> virtualListLoader = null;
Colosoft.Query.QueryableExecuterHandler <TEntity> executeSelect = null;
if (bindStrategy == null && objectCreator == null)
{
var ts = Colosoft.Query.TypeBindStrategyCache.GetItem(typeof(TEntity), t => new Colosoft.Query.QueryResultObjectCreator(t));
objectCreator = ts;
bindStrategy = ts;
}
if (bindStrategy == null)
{
bindStrategy = new Colosoft.Query.TypeBindStrategy(typeof(TEntity), objectCreator);
}
var queryable2 = (Colosoft.Query.Queryable)queryable.Clone();
if (typeof(Colosoft.Business.IEntity).IsAssignableFrom(typeof(TEntity)))
{
virtualListLoader = Colosoft.Business.EntityManager.Instance.GetEntityVirtualListLoader <TEntity>(queryable2, countExpression, true, uiContext, null);
executeSelect = (queryable3, dataSource, bindStrategy1, objectCreator1) => queryable3.ExecuteSelectProcessLazyResult <TEntity>(uiContext, null, bindStrategy1, objectCreator1);
}
else
{
virtualListLoader = new Colosoft.Business.QueryableVirtualListLoader <TEntity>(queryable2, countExpression, bindStrategy, objectCreator, null);
}
return(new Business.QueryableVirtualList <TEntity>(queryable2, pageSize, virtualListLoader, executeSelect, null, bindStrategy, objectCreator));
}
public VirtualList(int pageSize, VirtualListLoader <T> loader, object referenceObject)
{
if (loader == null)
{
throw new ArgumentNullException("loader");
}
PageSize = pageSize;
Loader = loader;
ReferenceObject = referenceObject;
Refresh();
}
/// <summary>
/// Método usado para converter o loader.
/// </summary>
/// <param name="loader"></param>
/// <returns></returns>
private static VirtualListLoader <DataWrapper <T> > ConverterLoader(VirtualListLoader <T> loader)
{
return(VirtualListLoader <DataWrapper <T> > .Create((sender, e) => {
var result = loader.Load((IObservableCollection)sender, e.StartRow, e.PageSize, e.NeedItemsCount, e.ReferenceObject);
if (result.Error != null)
{
return new VirtualListLoaderResult <DataWrapper <T> >(result.Error);
}
IEnumerable <DataWrapper <T> > items = result.Items != null ? result.Items.Select(f => new DataWrapper <T>(0, f)) : null;
if (result.UpdateCount)
{
return new VirtualListLoaderResult <DataWrapper <T> >(items, result.NewCount);
}
return new VirtualListLoaderResult <DataWrapper <T> >(items);
}));
}
/// <summary>
/// Método usado para converter o loader.
/// </summary>
/// <param name="loader"></param>
/// <returns></returns>
private static VirtualListLoader <DataWrapper <T> > ConverterLoader(VirtualListLoaderHandler <T> loader)
{
return(VirtualListLoader <DataWrapper <T> > .Create((sender, e) => {
var result = loader(sender, e);
if (result.Error != null)
{
return new VirtualListLoaderResult <DataWrapper <T> >(result.Error);
}
IEnumerable <DataWrapper <T> > items = result.Items != null ? result.Items.Select(f => new DataWrapper <T>(0, f)) : null;
if (result.UpdateCount)
{
return new VirtualListLoaderResult <DataWrapper <T> >(items, result.NewCount);
}
return new VirtualListLoaderResult <DataWrapper <T> >(items);
}));
}
public static Collections.VirtualList <TEntity> ToVirtualResultLazy <TEntity>(this Colosoft.Query.Queryable queryable, int pageSize, Collections.VirtualListLoader <TEntity> listLoader, Colosoft.Query.IQueryResultBindStrategy bindStrategy = null, Colosoft.Query.IQueryResultObjectCreator objectCreator = null) where TEntity : class
{
queryable.Require("queryable").NotNull();
var queryable2 = (Colosoft.Query.Queryable)queryable.Clone();
Colosoft.Query.QueryableExecuterHandler <TEntity> executeSelect = null;
if (typeof(Colosoft.Business.IEntity).IsAssignableFrom(typeof(TEntity)))
{
executeSelect = (queryable3, dataSource, bindStragety1, objectCreator1) => queryable3.ExecuteSelectProcessLazyResult <TEntity>(null, null, bindStragety1, objectCreator1);
}
return(new Business.QueryableVirtualList <TEntity>(queryable2, pageSize, listLoader, executeSelect, null, bindStrategy, objectCreator));
}
public VirtualList(int pageSize, VirtualListLoaderHandler <T> loader, object referenceObject) : this(pageSize, VirtualListLoader <T> .Create(loader), referenceObject)
{
}
/// <summary>
/// Construtor padrão.
/// </summary>
/// <param name="loader"></param>
/// <param name="refObject"></param>
/// <param name="pageSize"></param>
public AsyncVirtualList(int pageSize, VirtualListLoader <T> loader, object refObject) : base(pageSize, ConverterLoader(loader), refObject)
{
_synchronizationContext = SynchronizationContext.Current;
}
