RepeatBehaviorConverter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Animation / RepeatBehaviorConverter.cs / 1305600 / RepeatBehaviorConverter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Windows Client Platform
//  Copyright (c) Microsoft Corporation, 2004
//
//  File: RepeatBehaviorConverter.cs 
//-----------------------------------------------------------------------------
 
using System; 
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Security; 

namespace System.Windows.Media.Animation 
{ 
    /// 
    /// 
    /// 
    public sealed class RepeatBehaviorConverter : TypeConverter
    {
        #region Data 

        private static char[] _iterationCharacter = new char[] { 'x' }; 
 
        #endregion
 
        /// 
        /// 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;
            }
            else 
            {
                return false; 
            } 
        }
 
        /// 
        /// ConvertFrom
        /// 
        ///  
        public override object ConvertFrom(
            ITypeDescriptorContext td, 
            CultureInfo cultureInfo, 
            object value)
        { 
            string stringValue = value as string;

            if (stringValue != null)
            { 
                stringValue = stringValue.Trim();
 
                if (stringValue == "Forever") 
                {
                    return RepeatBehavior.Forever; 
                }
                else if (   stringValue.Length > 0
                         && stringValue[stringValue.Length - 1] == _iterationCharacter[0])
                { 
                    string stringDoubleValue = stringValue.TrimEnd(_iterationCharacter);
 
                    double doubleValue = (double)TypeDescriptor.GetConverter(typeof(double)).ConvertFrom(td, cultureInfo, stringDoubleValue); 

                    return new RepeatBehavior(doubleValue); 
                }
            }

            // The value is not Forever or an iteration count so it's either a TimeSpan 
            // or we'll let the TimeSpanConverter raise the appropriate exception.
 
            TimeSpan timeSpanValue = (TimeSpan)TypeDescriptor.GetConverter(typeof(TimeSpan)).ConvertFrom(td, cultureInfo, stringValue); 

            return new RepeatBehavior(timeSpanValue); 
        }

        /// 
        /// 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 RepeatBehavior, not an arbitrary class
        /// 
        [SecurityCritical] 
        public override object ConvertTo(
            ITypeDescriptorContext context, 
            CultureInfo cultureInfo,
            object value,
            Type destinationType)
        { 
            if (   value is RepeatBehavior
                && destinationType != null) 
            { 
                RepeatBehavior repeatBehavior = (RepeatBehavior)value;
 
                if (destinationType == typeof(InstanceDescriptor))
                {
                    MemberInfo mi;
 
                    if (repeatBehavior == RepeatBehavior.Forever)
                    { 
                        mi = typeof(RepeatBehavior).GetProperty("Forever"); 

                        return new InstanceDescriptor(mi, null); 
                    }
                    else if (repeatBehavior.HasCount)
                    {
                        mi = typeof(RepeatBehavior).GetConstructor(new Type[] { typeof(double) }); 

                        return new InstanceDescriptor(mi, new object[] { repeatBehavior.Count }); 
                    } 
                    else if (repeatBehavior.HasDuration)
                    { 
                        mi = typeof(RepeatBehavior).GetConstructor(new Type[] { typeof(TimeSpan) });

                        return new InstanceDescriptor(mi, new object[] { repeatBehavior.Duration });
                    } 
                    else
                    { 
                        Debug.Fail("Unknown type of RepeatBehavior passed to RepeatBehaviorConverter."); 
                    }
                } 
                else if (destinationType == typeof(string))
                {
                    return repeatBehavior.InternalToString(null, cultureInfo);
                } 
            }
 
            // We can't do the conversion, let the base class raise the 
            // appropriate exception.
 
            return base.ConvertTo(context, cultureInfo, value, destinationType);
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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RepeatBehaviorConverter.cs source code in C# .NET

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