///////////////////////////////////////////////////////////////////////////////
//Copyright (c) 2016, 北京探索者软件公司
//All rights reserved.       
//文件名称: BaseObjectToComboxItemConverter.cs
//文件描述: 基础的转换
//创 建 者: xls
//创建日期: 2018-1-30
//版 本 号：1.0.0.0
////////////////////////////////////////////////////////////////////////////////

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Data;
namespace FWindSoft.Wpf
{
    public class BaseItemsConverter : IValueConverter
    {
        private Func<object, object> m_Fun, m_TurnFun;
        public BaseItemsConverter()
        {
        }
        public BaseItemsConverter(Func<object, object> fun,Func<object, object> turnFun)
        {
            m_Fun = fun;
            m_TurnFun = turnFun;
        }
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            try
            {
                var enumerable = parameter as IEnumerable;
                if (enumerable == null)
                    return value;
                Func<object, object> tempConvert = m_Fun;
                if (tempConvert == null)
                {
                    tempConvert = (v) => { if (v == null) return string.Empty; return v; };
                }
                return enumerable.OfType<object>().FirstOrDefault(i => i.ToString().Equals(tempConvert(value).ToString()));
            }
            catch (Exception ex)
            {                
                throw;
            }
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            try
            {
                var enumerable = parameter as IEnumerable;
                if (enumerable == null)
                    return value;
                Func<object, object> tempConvert = m_TurnFun;
                if (tempConvert == null)
                {
                    tempConvert = (v) => { if (v == null) return string.Empty; return v; };
                }
                return System.Convert.ChangeType(tempConvert(value), targetType);
            }
            catch (Exception ex)
            {               
                throw;
            }
            return value;
        }
    }
}