ProxyWebPart.cs source code in C# .NET

                        Code:
                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / ProxyWebPart.cs / 1 / ProxyWebPart.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Globalization;
    using System.Security.Permissions;
    using System.Web.UI; 
    using System.Web.UI.WebControls;
    using System.Web.Util; 
 
    [
    ToolboxItem(false) 
    ]
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public abstract class ProxyWebPart : WebPart { 

        private string _originalID; 
        private string _originalTypeName; 
        private string _originalPath;
        private string _genericWebPartID; 

        protected ProxyWebPart(WebPart webPart) {
            if (webPart == null) {
                throw new ArgumentNullException("webPart"); 
            }
 
            GenericWebPart genericWebPart = webPart as GenericWebPart; 
            if (genericWebPart != null) {
                Control childControl = genericWebPart.ChildControl; 
                if (childControl == null) {
                    throw new ArgumentException(SR.GetString(
                        SR.PropertyCannotBeNull, "ChildControl"), "webPart");
                } 

                _originalID = childControl.ID; 
                if (String.IsNullOrEmpty(_originalID)) { 
                    throw new ArgumentException(SR.GetString(
                        SR.PropertyCannotBeNullOrEmptyString, "ChildControl.ID"), "webPart"); 
                }

                Type originalType;
                UserControl childUserControl = childControl as UserControl; 
                if (childUserControl != null) {
                    originalType = typeof(UserControl); 
                    _originalPath = childUserControl.AppRelativeVirtualPath; 
                }
                else { 
                    originalType = childControl.GetType();
                }
                _originalTypeName = WebPartUtil.SerializeType(originalType);
                _genericWebPartID = genericWebPart.ID; 
                if (String.IsNullOrEmpty(_genericWebPartID)) {
                    throw new ArgumentException(SR.GetString( 
                        SR.PropertyCannotBeNullOrEmptyString, "ID"), "webPart"); 
                }
                ID = _genericWebPartID; 
            }
            else {
                _originalID = webPart.ID;
                if (String.IsNullOrEmpty(_originalID)) { 
                    throw new ArgumentException(SR.GetString(
                        SR.PropertyCannotBeNullOrEmptyString, "ID"), "webPart"); 
                } 
                _originalTypeName = WebPartUtil.SerializeType(webPart.GetType());
                ID = _originalID; 
            }
        }

        protected ProxyWebPart(string originalID, string originalTypeName, string originalPath, string genericWebPartID) { 
            if (String.IsNullOrEmpty(originalID)) {
                throw ExceptionUtil.ParameterNullOrEmpty("originalID"); 
            } 
            if (String.IsNullOrEmpty(originalTypeName)) {
                throw ExceptionUtil.ParameterNullOrEmpty("originalTypeName"); 
            }

            // If you specify a path, this must be a GenericWebPart so genericWebPartID should not be null
            if (!String.IsNullOrEmpty(originalPath) && String.IsNullOrEmpty(genericWebPartID)) { 
                throw ExceptionUtil.ParameterNullOrEmpty("genericWebPartID");
            } 
 
            _originalID = originalID;
            _originalTypeName = originalTypeName; 
            _originalPath = originalPath;
            _genericWebPartID = genericWebPartID;
            if (!String.IsNullOrEmpty(genericWebPartID)) {
                ID = _genericWebPartID; 
            }
            else { 
                ID = _originalID; 
            }
        } 

        public string GenericWebPartID {
            get {
                return (_genericWebPartID != null) ? _genericWebPartID : String.Empty; 
            }
        } 
 
        // Seal the ID property so we can set it in the constructor without an FxCop violation.
        public sealed override string ID { 
            get {
                return base.ID;
            }
            set { 
                base.ID = value;
            } 
        } 

        public string OriginalID { 
            get {
                return (_originalID != null) ? _originalID : String.Empty;
            }
        } 

        public string OriginalTypeName { 
            get { 
                return (_originalTypeName != null) ? _originalTypeName : String.Empty;
            } 
        }

        public string OriginalPath {
            get { 
                return (_originalPath != null) ? _originalPath : String.Empty;
            } 
        } 

        // Accept any ControlState, but do nothing with it, since it is actually the ControlState 
        // for the WebPart we are replacing.
        protected internal override void LoadControlState(object savedState) {
        }
 
        // Accept any ViewState, but do nothing with it, since it is actually the ViewState
        // for the WebPart we are replacing. 
        protected override void LoadViewState(object savedState) { 
        }
 
        // Do not save any ControlState, since the ProxyWebPart itself does not need to save state
        // between requests.
        protected internal override object SaveControlState() {
            // Call base in case it has some side-effects that the control relies on 
            base.SaveControlState();
            return null; 
        } 

        // Do not save any ViewState, since the ProxyWebPart itself does not need to save state 
        // between requests.
        protected override object SaveViewState() {
            // Call base in case it has some side-effects that the control relies on
            base.SaveViewState(); 
            return null;
        } 
 
    }
}
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ProxyWebPart.cs source code in C# .NET

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