PropertyOverridesTypeEditor.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Design / PropertyOverridesTypeEditor.cs / 1305376 / PropertyOverridesTypeEditor.cs
                        

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

namespace System.Web.UI.Design.MobileControls 
{ 
    using System;
    using System.ComponentModel; 
    using System.ComponentModel.Design;
    using System.Diagnostics;
    using System.Drawing.Design;
    using System.Windows.Forms.Design; 

    using DialogResult = System.Windows.Forms.DialogResult; 
 
    [
        System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, 
        Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)
    ]
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    internal class PropertyOverridesTypeEditor : UITypeEditor 
    {
        private static readonly String _propertyOverridesDescription = "PropertyOverrides"; 
 
        public override Object EditValue(ITypeDescriptorContext context,  IServiceProvider  provider, Object value)
        { 
            Debug.Assert(context.Instance is Control, "Expected control");
            Control ctrl = (Control) context.Instance;

            IServiceProvider serviceProvider; 
            ISite site = ctrl.Site;
            if (site == null && ctrl.Page != null) 
            { 
                site = ctrl.Page.Site;
            } 
            if (site != null)
            {
                serviceProvider = site;
            } 
            else
            { 
                serviceProvider = provider; 
            }
            Debug.Assert(serviceProvider != null, 
                "Failed to get the serviceProvider");

            IComponentChangeService changeService =
                (IComponentChangeService) serviceProvider.GetService(typeof(IComponentChangeService)); 

            IDesignerHost designerHost = 
                (IDesignerHost) serviceProvider.GetService(typeof(IDesignerHost)); 
            Debug.Assert(designerHost != null,
                "Must always have access to IDesignerHost service"); 

            IDeviceSpecificDesigner dsDesigner =
                designerHost.GetDesigner(ctrl) as IDeviceSpecificDesigner;
            Debug.Assert(dsDesigner != null, 
                "Expected component designer to implement IDeviceSpecificDesigner");
 
            IMobileWebFormServices wfServices = 
                (IMobileWebFormServices)serviceProvider.GetService(typeof(IMobileWebFormServices));
 
            DialogResult result = DialogResult.Cancel;

            DesignerTransaction transaction = designerHost.CreateTransaction(_propertyOverridesDescription);
            try 
            {
                if (changeService != null) 
                { 
                    try
                    { 
                        changeService.OnComponentChanging(ctrl, null);
                    }
                    catch (CheckoutException ce)
                    { 
                        if (ce == CheckoutException.Canceled)
                        { 
                            return value; 
                        }
                        throw; 
                    }
                }

                try 
                {
                    PropertyOverridesDialog dialog = new PropertyOverridesDialog( 
                        dsDesigner, 
                        MobileControlDesigner.MergingContextProperties
                        ); 
                    IWindowsFormsEditorService edSvc =
                        (IWindowsFormsEditorService) provider.GetService(typeof(IWindowsFormsEditorService));
                    result = edSvc.ShowDialog(dialog);
                } 
                catch(InvalidChoiceException e)
                { 
                    Debug.Fail(e.ToString()); 
                }
                finally 
                {
                    if (changeService != null && result != DialogResult.Cancel)
                    {
                        changeService.OnComponentChanged(ctrl, null, null, null); 
                    }
                } 
            } 
            finally
            { 
                if (transaction != null)
                {
                    if (result == DialogResult.OK)
                    { 
                        transaction.Commit();
                    } 
                    else 
                    {
                        transaction.Cancel(); 
                    }
                }
            }
 
            return value;
        } 
 
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        { 
            return UITypeEditorEditStyle.Modal;
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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