xmlns:sys="clr-namespace:System;assembly=mscorlib"
<DatePicker x:Name="datePickerCtl" SelectedDate="{x:Static sys:DateTime.Now}" SelectedDateFormat="Short" FirstDayOfWeek="Monday" IsTodayHighlighted="True" Grid.Row="0" Grid.Column="1"> <DatePicker.Resources> <Style TargetType="{x:Type DatePickerTextBox}"> <Setter Property="Control.Template"> <Setter.Value> <ControlTemplate> <TextBox x:Name="PART_TextBox" Text="{Binding Path=SelectedDate, StringFormat='yyyy-MM-dd', RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" /> </ControlTemplate> </Setter.Value> </Setter> </Style> </DatePicker.Resources> </DatePicker>
datePickerCtl.SelectedDate = DateTime.Now;
var strDate = datePickerCtl.SelectedDate.Value.ToString("yyyy-MM-dd");
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