ControlAdapter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / ControlAdapter.cs / 1 / ControlAdapter.cs
                        

                        
                            //How to set the _control 

//------------------------------------------------------------------------------
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
//----------------------------------------------------------------------------- 
 
namespace System.Web.UI.Adapters {
    using System; 
    using System.ComponentModel;
    using System.Security.Permissions;

    /* Defines the properties, methods, and events shared by all server control 
     * adapters in the Web Forms page framework.
    */ 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public abstract class ControlAdapter { 
        private HttpBrowserCapabilities _browser = null;

        internal Control _control; //control associated with this adapter
 
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        ]
        protected Control Control { 
            get {
                return _control;
            }
        } 

        /* Indicates the page on which the associated control resides. 
        */ 
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        ]
        protected Page Page {
            get { 
                if(Control != null)
                    return Control.Page; 
                return null; 
            }
        } 

        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        ]
        protected PageAdapter PageAdapter { 
            get { 
                if(Control != null && Control.Page != null)
                    return Control.Page.PageAdapter; 
                return null;
            }
        }
 
        protected HttpBrowserCapabilities Browser {
            get { 
                if (_browser == null) { 
                    if (Page.RequestInternal != null) {
                        _browser = Page.RequestInternal.Browser; 
                    }
                    else {
                        /* VSWhidbey 83667: In post-cache substitution, Page.Request
                         * would not be available. Then we try to 
                         * use the more expensive way to access the current
                         * context and get the request handle. 
                         */ 
                        HttpContext context = HttpContext.Current;
                        if (context != null && context.Request != null) { 
                            _browser = context.Request.Browser;
                        }
                    }
                } 

                return _browser; 
            } 
        }
 
        protected internal virtual void OnInit(EventArgs e) {
            Control.OnInit(e);
        }
 
        protected internal virtual void OnLoad(EventArgs e) {
            Control.OnLoad(e); 
        } 

        protected internal virtual void OnPreRender(EventArgs e) { 
            Control.OnPreRender(e);
        }

        protected internal virtual void Render(HtmlTextWriter writer) { 
            //
            if(_control != null) { 
                _control.Render(writer); 
            }
        } 

        protected virtual void RenderChildren(HtmlTextWriter writer) {
            if(_control != null) {
                _control.RenderChildren(writer); 
            }
        } 
 
        protected internal virtual void OnUnload(EventArgs e) {
            Control.OnUnload(e); 
        }

        protected internal virtual void BeginRender(HtmlTextWriter writer) {
            writer.BeginRender(); 
        }
 
        protected internal virtual void CreateChildControls() { 
            Control.CreateChildControls();
        } 

        protected internal virtual void EndRender(HtmlTextWriter writer) {
            writer.EndRender();
        } 

        protected internal virtual void LoadAdapterControlState(object state) { 
        } 

        protected internal virtual void LoadAdapterViewState(object state) { 
        }

        protected internal virtual object SaveAdapterControlState() {
            return null; 
        }
 
        protected internal virtual object SaveAdapterViewState() { 
            return null;
        } 
    }
}

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