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//------------------------------------------------------------------------------
// <copyright file="CatalogZone.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls.WebParts {
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Drawing;
using System.Globalization;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Util;
[
Designer("System.Web.UI.Design.WebControls.WebParts.CatalogZoneDesigner, " + AssemblyRef.SystemDesign),
SupportsEventValidation,
]
public class CatalogZone : CatalogZoneBase {
private ITemplate _zoneTemplate;
protected override CatalogPartCollection CreateCatalogParts() {
CatalogPartCollection catalogParts = new CatalogPartCollection();
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()) {
foreach (Control control in container.Controls) {
CatalogPart part = control as CatalogPart;
if (part != null) {
catalogParts.Add(part);
}
else {
LiteralControl literal = control as LiteralControl;
// Throw an exception if it is *not* a literal containing only whitespace
// Don't throw an exception in the designer, since we want only the offending
// control to render as an error block, not the whole CatalogZone.
if (((literal == null) || (literal.Text.Trim().Length != 0)) && !DesignMode) {
throw new InvalidOperationException(SR.GetString(SR.CatalogZone_OnlyCatalogParts, ID));
}
}
}
}
}
return catalogParts;
}
[
Browsable(false),
DefaultValue(null),
PersistenceMode(PersistenceMode.InnerProperty),
TemplateContainer(typeof(CatalogZone)),
TemplateInstance(TemplateInstance.Single)
]
public virtual ITemplate ZoneTemplate {
get {
return _zoneTemplate;
}
set {
InvalidateCatalogParts();
_zoneTemplate = value;
}
}
}
}
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