WebPartZone.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebParts / WebPartZone.cs / 1305376 / 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.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,
    ]
    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;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    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,
    ]
    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;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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WebPartZone.cs source code in C# .NET

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