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