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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Extensions / UI / WebControls / Expressions / QueryExpression.cs / 1305376 / QueryExpression.cs
#if ORYX_VNEXT namespace Microsoft.Web.Data.UI.WebControls.Expressions { #else namespace System.Web.UI.WebControls.Expressions { #endif using System; using System.Collections.ObjectModel; using System.ComponentModel; using System.Diagnostics.CodeAnalysis; using System.Linq; using System.Linq.Expressions; using System.Web; using System.Web.UI; [ ParseChildren(true, "Expressions"), PersistChildren(false) ] public class QueryExpression { private HttpContext _context; private Control _owner; private IQueryableDataSource _dataSource; private DataSourceExpressionCollection _expressions; [ PersistenceMode(PersistenceMode.InnerDefaultProperty) ] public DataSourceExpressionCollection Expressions { get { if (_expressions == null) { _expressions = new DataSourceExpressionCollection(); } return _expressions; } } public void Initialize(Control owner, HttpContext context, IQueryableDataSource dataSource) { _owner = owner; _context = context; _dataSource = dataSource; Expressions.SetContext(owner, context, dataSource); } public virtual IQueryable GetQueryable(IQueryable source) { if (source == null) { return null; } foreach (DataSourceExpression e in Expressions) { source = e.GetQueryable(source) ?? source; } return source; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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