PDFOffice_Windows_exe/PDF Office/DataConvert/StringToDateConvert.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Data;

namespace PDF_Office.DataConvert
{
    /// <summary>
    /// 用于注释 书签等的时间转换
    /// </summary>
    public class StringToDateConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string date = "";
            if (string.IsNullOrEmpty((string)value) || !Regex.IsMatch(value.ToString(), "(?<=D\\:)[0-9]+(?=[\\+\\-])"))
            {
                date = System.DateTime.Now.ToString("HH:mm");
            }
            else if (Regex.IsMatch(value.ToString(), "(?<=D\\:)[0-9]+(?=[\\+\\-])"))
            {
                string dateStr = Regex.Match(value.ToString(), "(?<=D\\:)[0-9]+(?=[\\+\\-])").Value;

                if (string.Equals(dateStr.Substring(4, 4), DateTime.Now.ToString("MMdd")))
                {//同天
                    date = dateStr.Substring(8, 2) + ":" + dateStr.Substring(10, 2);
                }
                else if (string.Equals(dateStr.Substring(0, 4), DateTime.Now.ToString("yyyy")))
                {//同年
                    date = dateStr.Substring(4, 2) + "/" + dateStr.Substring(6, 2) + " " + dateStr.Substring(8, 2) + ":" +
                   dateStr.Substring(10, 2);
                }
                else
                {
                    date = dateStr.Substring(0, 4) + "/" + dateStr.Substring(4, 2) + "/" + dateStr.Substring(6, 2) + " " + dateStr.Substring(8, 2) + ":" +
                    dateStr.Substring(10, 2);
                }
            }
            return date;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return null;
        }
    }
}