自定义 日期格式的datePicker

用法如下：

CustomDateFormat 只要是符合日期格式的都可以。如果乱写。就会显示有问题

<CustomControl:CustomDatePicker Margin="0,100,0,0"  CustomDateFormat="MM/dd/yyyy"/>

代码如下

public class CustomDatePicker : DatePicker
    {
        public string CustomDateFormat
        {
            get { return (string)GetValue(CustomDateFormatProperty); }
            set { SetValue(CustomDateFormatProperty, value); }
        }

        // Using a DependencyProperty as the backing store for CustomDateFormat.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty CustomDateFormatProperty =
            DependencyProperty.Register("CustomDateFormat", typeof(string), typeof(CustomDatePicker), new UIPropertyMetadata(string.Empty,new PropertyChangedCallback(OnCustomDateFormatChanged)));
       
        private static void OnCustomDateFormatChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            Thread.CurrentThread.CurrentCulture = (CultureInfo)Thread.CurrentThread.CurrentCulture.Clone();
            Thread.CurrentThread.CurrentCulture.DateTimeFormat.ShortDatePattern = e.NewValue.ToString();
            Thread.CurrentThread.CurrentCulture.DateTimeFormat.LongDatePattern = e.NewValue.ToString();
        }    
    }