Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Extensions / UI / WebControls / Expressions / ParameterDataSourceExpression.cs / 1305376 / ParameterDataSourceExpression.cs
#if ORYX_VNEXT namespace Microsoft.Web.Data.UI.WebControls.Expressions { using System.Web; using System.Web.UI; #else namespace System.Web.UI.WebControls.Expressions { #endif using System; using System.Collections.Generic; using System.Collections.Specialized; using System.Linq.Expressions; using System.Web.UI.WebControls; [ PersistChildren(false), ParseChildren(true, "Parameters") ] public abstract class ParameterDataSourceExpression : DataSourceExpression { private ParameterCollection _parameters; [PersistenceMode(PersistenceMode.InnerDefaultProperty)] public ParameterCollection Parameters { get { if (_parameters == null) { _parameters = new ParameterCollection(); _parameters.ParametersChanged += new EventHandler(OnParametersChanged); } return _parameters; } } internal virtual IDictionaryGetValues() { return Parameters.ToDictionary(Context, Owner); } public override void SetContext(Control owner, HttpContext context, IQueryableDataSource dataSource) { base.SetContext(owner, context, dataSource); owner.Page.LoadComplete += new EventHandler(OnPageLoadComplete); } private void OnParametersChanged(object sender, EventArgs e) { if (DataSource != null) { DataSource.RaiseViewChanged(); } } private void OnPageLoadComplete(object sender, System.EventArgs e) { Parameters.UpdateValues(Context, Owner); } protected override object SaveViewState() { Pair p = new Pair(); p.First = base.SaveViewState(); p.Second = DataSourceHelper.SaveViewState(_parameters); return p; } protected override void LoadViewState(object savedState) { Pair p = (Pair)savedState; base.LoadViewState(p.First); if (p.Second != null) { ((IStateManager)Parameters).LoadViewState(p.Second); } } protected override void TrackViewState() { base.TrackViewState(); DataSourceHelper.TrackViewState(_parameters); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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