ProjectAnalogParus/ProjectAnalogParus/EncouragementSummaPage.xaml

<Page x:Class="ProjectAnalogParus.EncouragementSummaPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:ProjectAnalogParus"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="EncouragementSummaPage">

    <Grid>
        <Button Content="Расчитать" HorizontalAlignment="Left" Margin="154,355,0,0" VerticalAlignment="Top" Width="75" Click="SummaClick"/>
        <ComboBox Name="cmbStudent" HorizontalAlignment="Left" Margin="302,60,0,0" VerticalAlignment="Top" Width="120">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock DataContext="{Binding}">
                        <TextBlock.Text>
                            <MultiBinding StringFormat="{}{0} {1} {2}">
                                <Binding Path="LastName" />
                                <Binding Path="FirstName" />
                                <Binding Path="Middlename" />
                            </MultiBinding>
                        </TextBlock.Text>
                    </TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>

        <ComboBox Name="cmbUser" HorizontalAlignment="Left" Margin="302,112,0,0" VerticalAlignment="Top" Width="120"/>
        <ComboBox Name="cmbScholarship" HorizontalAlignment="Left" Margin="304,181,0,0" VerticalAlignment="Top" Width="120"/>
        <ComboBox Name="cmbEncoragement" HorizontalAlignment="Left" Margin="304,221,0,0" VerticalAlignment="Top" Width="120"/>
        <TextBlock Name="AmoutSumma" HorizontalAlignment="Left" Margin="304,254,0,0" TextWrapping="Wrap"  VerticalAlignment="Top" Height="24" Width="120"/>
        <DatePicker SelectedDate="{Binding Path = SellStartDate, StringFormat = {}{0:yyyy-MM-dd}}" SelectedDateFormat="Short" Name="datetime" HorizontalAlignment="Left" Margin="302,143,0,0" VerticalAlignment="Top" Height="29" Width="120"  IsTodayHighlighted="True">
            <DatePicker.Resources>
                <Style TargetType="DatePickerTextBox">
                    <Setter Property="Control.Template">
                        <Setter.Value>
                            <ControlTemplate>
                                <TextBox x:Name="PART_TextBox"
                                    Text="{Binding Path=SelectedDate, StringFormat = {}{0:yyyy-MM-dd}, 
                                    RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </DatePicker.Resources>
        </DatePicker>
        <Button Content="Начислить" HorizontalAlignment="Left" Margin="265,355,0,0" VerticalAlignment="Top" Width="94" Height="20" Click="ReqisitesScholarshipsClick"/>

    </Grid>
</Page>