DynamicResourceExtension.cs source code in C# .NET

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Code:

/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / DynamicResourceExtension.cs / 1 / DynamicResourceExtension.cs

                            /****************************************************************************\ 
*
* File: DynamicResourceExtension.cs
*
*  Class for Xaml markup extension for static resource references. 
*
* Copyright (C) 2004 by Microsoft Corporation.  All rights reserved. 
* 
\***************************************************************************/
 
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Markup; 
using System.Reflection;
using MS.Internal; // Helper 
 
namespace System.Windows
{ 

    /// 
    ///  Class for Xaml markup extension for static resource references.
    ///  
    [TypeConverter(typeof(DynamicResourceExtensionConverter))]
    [MarkupExtensionReturnType(typeof(object))] 
    public class DynamicResourceExtension : MarkupExtension 
    {
        ///  
        ///  Constructor that takes no parameters
        /// 
        public DynamicResourceExtension()
        { 
        }
 
        ///  
        ///  Constructor that takes the resource key that this is a static reference to.
        ///  
        public DynamicResourceExtension(
            object resourceKey)
        {
            if (resourceKey == null) 
            {
                throw new ArgumentNullException("resourceKey"); 
            } 
            _resourceKey = resourceKey;
        } 


        /// 
        ///  Return an object that should be set on the targetObject's targetProperty 
        ///  for this markup extension.  For DynamicResourceExtension, this is the object found in
        ///  a resource dictionary in the current parent chain that is keyed by ResourceKey 
        ///  
        /// 
        ///  The object to set on this property. 
        /// 
        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            if (ResourceKey == null) 
            {
                throw new InvalidOperationException(SR.Get(SRID.MarkupExtensionResourceKey)); 
            } 

            if (serviceProvider != null) 
            {
                IProvideValueTarget provideValueTarget = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;

                // DynamicResourceExtensions are not allowed On CLR props except for Setter,Trigger,Condition (bugs 1183373,1572537) 

                DependencyObject targetDependencyObject; 
                DependencyProperty targetDependencyProperty; 
                Helper.CheckCanReceiveMarkupExtension(this, provideValueTarget, out targetDependencyObject, out targetDependencyProperty);
            } 

            return new ResourceReferenceExpression(ResourceKey);
        }
 

 
        ///  
        ///  The key in a Resource Dictionary used to find the object refered to by this
        ///  Markup Extension. 
        /// 
        [ConstructorArgument("resourceKey")] // Uses an instance descriptor
        public object ResourceKey
        { 
            get { return _resourceKey; }
            set 
            { 
                if (value == null)
                { 
                    throw new ArgumentNullException("value");
                }
                _resourceKey = value;
            } 
        }
 
        private object _resourceKey; 

 

    }
}
 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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