ProjectAnalogParus/ProjectAnalogParus/AccrualsPage.xaml

<Page x:Class="ProjectAnalogParus.AccrualsPage"
      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="AccrualsPage" Loaded="LoadedWindows">

    <Grid>

        <DataGrid Name="Acctualsgrid" HorizontalAlignment="Left" AutoGenerateColumns="False" Height="188" Margin="10,74,0,0" VerticalAlignment="Top" Width="780" >

            <DataGrid.Columns>
                <DataGridTextColumn Binding="{Binding IdAccrualsScholarship}" Header="Id" Width="*"/>
                <DataGridTextColumn Binding="{Binding Student.LastName}" Header="Студент" Width="3*"/>
                <DataGridTextColumn Binding="{Binding User.FullNameUser}" Header="Ответсвенное лицо" Width="3*" />
                <DataGridTextColumn Binding="{Binding DateAccruals,StringFormat='yyyy-MM-dd'}" Header="Дата начисления" Width="3*" />
                <DataGridTextColumn Binding="{Binding Scholarship.NameScholarship}" Header="Стипендия" Width="3*" />
                <DataGridTextColumn Binding="{Binding Encouragement.NameTypeEncouragement}" Header="Поощрение" Width="3*" />
                <DataGridTextColumn Binding="{Binding Amount}" Header="Сумма" Width="3*" />
            </DataGrid.Columns>
        </DataGrid>
        <Button Content="Экспорт Excel" HorizontalAlignment="Left" Margin="51,285,0,0" VerticalAlignment="Top" Width="97" Click="ExcelClick"/>
    </Grid>

</Page>