ErrorWebPart.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / ErrorWebPart.cs / 1 / ErrorWebPart.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Drawing;
    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 class ErrorWebPart : ProxyWebPart, ITrackingPersonalizable {
 
        private string _errorMessage; 

        // No constructor that takes a WebPart, since we ony use the ErrorWebPart when the original 
        // WebPart could not be instantiated.

        public ErrorWebPart(string originalID, string originalTypeName, string originalPath, string genericWebPartID) :
            base(originalID, originalTypeName, originalPath, genericWebPartID) { 
        }
 
        public string ErrorMessage { 
            get {
                return (_errorMessage != null) ? _errorMessage : String.Empty; 
            }
            set {
                _errorMessage = value;
            } 
        }
 
        protected override void AddAttributesToRender(HtmlTextWriter writer) { 
            WebPartZoneBase zone = Zone;
            if (zone != null && !zone.ErrorStyle.IsEmpty) { 
                zone.ErrorStyle.AddAttributesToRender(writer, this);
            }

            base.AddAttributesToRender(writer); 
        }
 
        // Can be overridden by derived classes to set properties 
        protected virtual void EndLoadPersonalization() {
            // We don't really need to set AllowEdit, since EditorPart.Display has 
            // a special case for ErrorWebPart.  However, let's set it to false anyway
            // for consistency.
            AllowEdit = false;
 
            // We want to force the user to see the ErrorWebPart, and we don't want to allow
            // them to hide or minimize it. 
            ChromeState = PartChromeState.Normal; 
            Hidden = false;
            AllowHide = false; 
            AllowMinimize = false;

            // There is no reason to allow exporting an ErrorWebPart.
            ExportMode = WebPartExportMode.None; 

            // We never call IsAuthorized() on ErrorWebParts, so there is no reason for 
            // AuthorizationFilter to be set. 
            AuthorizationFilter = String.Empty;
        } 

        protected internal override void RenderContents(HtmlTextWriter writer) {
            string errorMessage = ErrorMessage;
            if (!String.IsNullOrEmpty(errorMessage)) { 
                writer.WriteEncodedText(SR.GetString(SR.ErrorWebPart_ErrorText, errorMessage));
            } 
        } 

        #region ITrackingPersonalizable implementation 
        // It doesn't really matter what we return from this property, since this codepath will
        // never be reached for the ErrorWebPart.  However, we return true since we will never need
        // the framework to diff our properties.
        bool ITrackingPersonalizable.TracksChanges { 
            get {
                return true; 
            } 
        }
 
        void ITrackingPersonalizable.BeginLoad() {
        }

        void ITrackingPersonalizable.BeginSave() { 
        }
 
        void ITrackingPersonalizable.EndLoad() { 
            EndLoadPersonalization();
        } 

        void ITrackingPersonalizable.EndSave() {
        }
        #endregion 
    }
}

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