Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / WebPartZone.cs / 1 / WebPartZone.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls.WebParts { using System; using System.Collections; using System.ComponentModel; using System.Security.Permissions; using System.Web.UI; using System.Web.UI.WebControls; ////// Zone that hosts WebPart controls, and contains a template to specify the contained WebParts. /// [ Designer("System.Web.UI.Design.WebControls.WebParts.WebPartZoneDesigner, " + AssemblyRef.SystemDesign), SupportsEventValidation, ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class WebPartZone : WebPartZoneBase { private ITemplate _zoneTemplate; private bool _registrationComplete; [ Browsable(false), DefaultValue(null), PersistenceMode(PersistenceMode.InnerProperty), TemplateInstance(TemplateInstance.Single) ] public virtual ITemplate ZoneTemplate { get { return _zoneTemplate; } set { if (!DesignMode) { if (_registrationComplete) { throw new InvalidOperationException(SR.GetString(SR.WebPart_SetZoneTemplateTooLate)); } } _zoneTemplate = value; } } private void AddWebPartToList(WebPartCollection webParts, Control control) { WebPart part = control as WebPart; // We used to throw an exception if the template contained a non-whitespace literal. // However, sometimes Venus would insert
tags between the server controls // in the template. So, we now just ignore all literals. if ((part == null) && !(control is LiteralControl)) { WebPartManager manager = WebPartManager; if (manager != null) { part = manager.CreateWebPart(control); } else { part = WebPartManager.CreateWebPartStatic(control); } } if (part != null) { webParts.Add(part); } } protected internal override WebPartCollection GetInitialWebParts() { WebPartCollection webParts = new WebPartCollection(); if (ZoneTemplate != null) { // PERF: Instantiate the template into a special control, that does nothing when a child control // is added. This is more performant because the child control is never parented to the temporary // control, it's ID is never generated, etc. Control container = new NonParentingControl(); ZoneTemplate.InstantiateIn(container); if (container.HasControls()) { ControlCollection controls = container.Controls; foreach (Control control in controls) { if (control is ContentPlaceHolder) { if (control.HasControls()) { Control[] children = new Control[control.Controls.Count]; control.Controls.CopyTo(children, 0); foreach (Control child in children) { AddWebPartToList(webParts, child); } } } else { AddWebPartToList(webParts, control); } } } } return webParts; } protected internal override void OnInit(EventArgs e) { base.OnInit(e); _registrationComplete = true; } } }
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