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annotate MetroWpf/MetroWpf.Xaml/Converters/DateTimeToStringConverter.cs @ 15:060f02cd4591

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author stevenh7776 stevenhollidge@hotmail.com
date Mon, 12 Mar 2012 23:05:21 +0800
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15
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1 namespace MetroWpf.Xaml.Converters
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2 {
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3 using System;
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4 using System.Globalization;
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5 using System.Text;
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6 using System.Windows.Data;
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7
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8 /// <summary>
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9 /// Converts a Date and Time into a string for display.
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10 /// </summary>
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11 public class DateTimeToStringConverter : IValueConverter
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12 {
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13 #region IValueConverter Members
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14
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15 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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16 {
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17 var dateBuilder = new StringBuilder();
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18 var dtValue = (DateTime)value;
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19
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20 DateTime now = DateTime.Now;
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21 bool isToday = now.Date == dtValue.Date;
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22 bool wasYesterday = now.Subtract(TimeSpan.FromDays(1)).Date == dtValue.Date;
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23
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24 if (isToday || wasYesterday)
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25 {
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26 dateBuilder.Append(dtValue.ToString("t", culture));
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27 if (wasYesterday)
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28 {
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29 dateBuilder.Append(" yesterday");
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30 }
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31 }
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32 else
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33 {
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34 dateBuilder.Append(dtValue.ToString("g"));
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35 }
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36
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37 return dateBuilder.ToString();
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38 }
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39
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40 public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
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41 {
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42 throw new NotImplementedException();
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43 }
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44
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45 #endregion
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46 }
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47 }