Code:
/ DotNET / DotNET / 8.0 / 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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