/// <summary>
/// Initializes a new instance of the <see cref="LoadResult{TEntity}" /> class.
/// </summary>
/// <param name="loadOperation">The load operation which have been completed.</param>
/// <exception cref="System.ArgumentException">load operation must have been completed successfully</exception>
public LoadResult(LoadOperation <TEntity> loadOperation)
{
if (loadOperation.IsCanceled || loadOperation.HasError || !loadOperation.IsComplete)
{
throw new ArgumentException(Resources.OperationNotComplete);
}
// LoadOperation.Entities is a ReadOnlyObservableCollection which inherit ReadOnlyCollection
_loadedEntites = (ReadOnlyCollection <TEntity>)loadOperation.Entities;
EntityQuery = loadOperation.EntityQuery;
AllEntities = loadOperation.AllEntities;
TotalEntityCount = loadOperation.TotalEntityCount;
LoadBehavior = loadOperation.LoadBehavior;
}
/// <summary>
/// 等待数据载入，提供一个同步方法的扩展
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="q"></param>
/// <returns></returns>
public static IEnumerable <TEntity> waitLoaded <TEntity>(this LoadOperation <TEntity> q) where TEntity : Entity
{
System.Threading.AutoResetEvent auto = new System.Threading.AutoResetEvent(false);
q.Completed += (a, b) =>
{
auto.Set();
};
auto.WaitOne();
auto.Dispose();
if (null != q.Error)
{
throw q.Error;
}
return(q.Entities);
}