CatalogZone.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / CatalogZone.cs / 1 / CatalogZone.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls.WebParts { 
 
    using System.Collections;
    using System.Collections.Specialized; 
    using System.ComponentModel;
    using System.Drawing;
    using System.Globalization;
    using System.Security.Permissions; 
    using System.Web.UI;
    using System.Web.UI.WebControls; 
    using System.Web.Util; 

    [ 
    Designer("System.Web.UI.Design.WebControls.WebParts.CatalogZoneDesigner, " + AssemblyRef.SystemDesign),
    SupportsEventValidation,
    ]
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    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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