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//How to set the _control
//------------------------------------------------------------------------------
// <copyright file="ControlAdapter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
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.
*/
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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