Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Extensions / UI / WebControls / QueryExtender.cs / 1305376 / QueryExtender.cs
#if ORYX_VNEXT namespace Microsoft.Web.Data.UI.WebControls { using System.Web; using Microsoft.Web.Data.UI.WebControls.Expressions; #else namespace System.Web.UI.WebControls { using System.Web.UI.WebControls.Expressions; #endif using System; using System.ComponentModel; using System.Drawing; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Security.Permissions; using System.Web.UI; using System.Web.Resources; [TargetControlType(typeof(IQueryableDataSource))] [NonVisualControl()] [DefaultProperty("TargetControlID")] #if !ORYX_VNEXT [ToolboxBitmap(typeof(QueryExtender), "QueryExtender.bmp")] [Designer("System.Web.UI.Design.QueryExtenderDesigner, " + AssemblyRef.SystemWebExtensionsDesign)] #endif [ParseChildren(true, "Expressions")] [PersistChildren(false)] public class QueryExtender : Control { private QueryExpression _query; private string _targetControlID; private IQueryableDataSource _dataSource; public QueryExtender() { } internal QueryExtender(IQueryableDataSource dataSource) { _dataSource = dataSource; } [Browsable(false)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] public virtual IQueryableDataSource DataSource { get { if (_dataSource == null) { if (String.IsNullOrEmpty(TargetControlID)) { throw new InvalidOperationException(AtlasWeb.DataSourceControlExtender_TargetControlIDMustBeSpecified); } #if ORYX_VNEXT _dataSource = DataSourceExtensions.FindControl(this, TargetControlID) as IQueryableDataSource; #else _dataSource = DataBoundControlHelper.FindControl(this, TargetControlID) as IQueryableDataSource; #endif // if (_dataSource == null) { throw new InvalidOperationException( String.Format(CultureInfo.CurrentCulture, AtlasWeb.QueryExtender_DataSourceMustBeIQueryableDataSource, TargetControlID)); } } return _dataSource; } } [ Category("Behavior"), ResourceDescription("QueryExtender_Expressions"), PersistenceMode(PersistenceMode.InnerDefaultProperty), ] public DataSourceExpressionCollection Expressions { get { return Query.Expressions; } } [ Category("Behavior"), DefaultValue(""), IDReferenceProperty, ResourceDescription("ExtenderControl_TargetControlID"), SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "ID"), ] public virtual string TargetControlID { get { return _targetControlID ?? String.Empty; } set { if (_targetControlID != value) { _dataSource = null; _targetControlID = value; } } } private QueryExpression Query { get { if (_query == null) { _query = new QueryExpression(); } return _query; } } [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")] #if ORYX_VNEXT protected override void OnInit(EventArgs e) { #else protected internal override void OnInit(EventArgs e) { #endif if (!DesignMode) { DataSource.QueryCreated += new EventHandler(OnDataSourceQueryCreated); // Initialize the Query Query.Initialize(this, Context, DataSource); } base.OnInit(e); } private void OnDataSourceQueryCreated(object sender, QueryCreatedEventArgs e) { e.Query = Query.GetQueryable(e.Query); } protected override object SaveViewState() { Pair p = new Pair(); p.First = base.SaveViewState(); p.Second = _query != null ? ((IStateManager)_query.Expressions).SaveViewState() : null; return p; } protected override void LoadViewState(object savedState) { Pair p = (Pair)savedState; base.LoadViewState(p.First); if (p.Second != null) { ((IStateManager)Query.Expressions).LoadViewState(p.Second); } } protected override void TrackViewState() { base.TrackViewState(); if (_query != null) { ((IStateManager)_query.Expressions).TrackViewState(); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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