Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / PixelFormatConverter.cs / 1 / PixelFormatConverter.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001 // // File: PixelFormatConverter.cs // //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using MS.Internal; using System.Text; using System.Collections; using System.Globalization; using System.Windows; using System.Windows.Media; using System.Runtime.InteropServices; using System.Diagnostics; using System.Security; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { #region PixelFormatConverter //----------------------------------------------------------------------------- // PixelFormatConverter //----------------------------------------------------------------------------- ////// PixelFormatConverter /// public sealed class PixelFormatConverter : TypeConverter { ////// CanConvertFrom - Returns whether or not this class can convert from a given type /// public override bool CanConvertFrom(ITypeDescriptorContext td, Type t) { if (t == typeof(string)) { return true; } else { return false; } } ////// TypeConverter method override. /// /// ITypeDescriptorContext /// Type to convert to ///true if conversion is possible public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof(InstanceDescriptor) || destinationType == typeof(string)) { return true; } return base.CanConvertTo(context, destinationType); } ////// test /// public new object ConvertFromString(String value) { if ( null == value) { return null; } return new PixelFormat (value); } ////// test /// public override object ConvertFrom(ITypeDescriptorContext td, System.Globalization.CultureInfo ci, object o) { if ( null == o) { return null; } return new PixelFormat(o as string); } ////// TypeConverter method implementation. /// /// ITypeDescriptorContext /// current culture (see CLR specs) /// value to convert from /// Type to convert to ///converted value ////// Critical: calls InstanceDescriptor ctor which LinkDemands /// PublicOK: can only make an InstanceDescriptor for PixelFormat, not an arbitrary class /// [SecurityCritical] public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (null == destinationType) { throw new ArgumentNullException("destinationType"); } if (null == value) { throw new ArgumentNullException("value"); } if (!(value is PixelFormat)) { throw new ArgumentException(SR.Get(SRID.General_Expected_Type,"PixelFormat")); } if (destinationType == typeof(InstanceDescriptor)) { ConstructorInfo ci = typeof(PixelFormat).GetConstructor(new Type[]{typeof(string)}); PixelFormat p = (PixelFormat)value; return new InstanceDescriptor(ci, new object[]{p.ToString()}); } else if (destinationType == typeof(string)) { PixelFormat p = (PixelFormat)value; return p.ToString (); } return base.ConvertTo(context, culture, value, destinationType); } } #endregion // PixelFormatConverter } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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