DependencyPropertyConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

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

                        
                            /****************************************************************************\ 
*
* File: DependencyPropertyConverter.cs
*
*  Class for converting a given DependencyProperty to and from a string 
*
* Copyright (C) 2005 by Microsoft Corporation.  All rights reserved. 
* 
\***************************************************************************/
 
using System;
using System.ComponentModel;        // for TypeConverter
using System.Globalization;               // for CultureInfo
using System.Reflection; 
using MS.Utility;
using MS.Internal; 
using System.Windows; 
using System.ComponentModel.Design.Serialization;
using System.Windows.Documents; 

namespace System.Windows.Markup
{
    ///  
    ///     Class for converting a given DependencyProperty to and from a string
    ///  
    public sealed class DependencyPropertyConverter : TypeConverter 
    {
        #region Public Methods 

        /// 
        ///     CanConvertFrom()
        ///  
        /// ITypeDescriptorContext
        /// type to convert from 
        /// true if the given type can be converted, flase otherwise 
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        { 
            // We can only convert from a string and that too only if we have all the contextual information
            // Note: Sometimes even the serializer calls CanConvertFrom in order
            // to determine if it is a valid converter to use for serialization.
            if (sourceType == typeof(string) && 
                (context is TypeConvertContext))
            { 
                return true; 
            }
 
            return false;
        }

        ///  
        ///     TypeConverter method override.
        ///  
        /// ITypeDescriptorContext 
        /// Type to convert to
        /// true if conversion is possible 
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            return false;
        } 

        ///  
        ///     ConvertFrom() -TypeConverter method override. using the givein name to return DependencyProperty 
        /// 
        /// ITypeDescriptorContext 
        /// CultureInfo
        /// Object to convert from
        /// instance of Command
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object source) 
        {
            TypeConvertContext typeConvertContext = context as TypeConvertContext; 
 
            if (source is string && typeConvertContext != null)
            { 
                ParserContext parserContext = typeConvertContext.ParserContext;

                // Find the ownerType from the parser context (this should be generalized, but for now
                // hard-coded to style & template) 

                Type ownerType = null; 
 
                ownerType = parserContext.TargetType;
 
                DependencyProperty dp = XamlTypeMapper.ParsePropertyName(parserContext,
                                                                         ((string)source).Trim(),
                                                                         ref ownerType);
 
                return dp;
            } 
 
            throw GetConvertFromException(source);
        } 

        /// 
        ///     ConvertTo() - Serialization purposes, returns the string from Command.Name by adding ownerType.FullName
        ///  
        /// ITypeDescriptorContext
        /// CultureInfo 
        /// the	object to convert from 
        /// the type to convert to
        /// string object, if the destination type is string 
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            throw GetConvertToException(value, destinationType);
        } 

        #endregion Public Methods 
    } 
}
 

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

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