buechermarkt/BuechermarktClient/Students.xaml

<Window x:Class="BuechermarktClient.Students"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:BuechermarktClient"
        mc:Ignorable="d"
        Title="Students" Height="300" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
            <RowDefinition Height="Auto"></RowDefinition>
        </Grid.RowDefinitions>
        <Grid Grid.Row="0">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
                <ColumnDefinition Width="*"></ColumnDefinition>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
            </Grid.ColumnDefinitions>
            <Label Content="Search:" Grid.Column="0"></Label>
            <TextBox Grid.Column="1" Text="{Binding SearchField, Mode=OneWayToSource}"></TextBox>
            <Button Content="S" Grid.Column="2" Width="25" Click="Search_Click"/>
        </Grid>
        <ListView Grid.Row="1" Margin="0,0,0,0" Name="ViewList">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Vorname" DisplayMemberBinding="{Binding Forname}" Width="Auto"></GridViewColumn>
                    <GridViewColumn Header="nachname" DisplayMemberBinding="{Binding Lastname}" Width="Auto"></GridViewColumn>
                    <GridViewColumn Header="E-Mail" DisplayMemberBinding="{Binding EMail}" Width="Auto"></GridViewColumn>
                    <GridViewColumn Header="Telefon" DisplayMemberBinding="{Binding PhoneNumber}" Width="Auto"></GridViewColumn>
                    <GridViewColumn Header="LabelId" DisplayMemberBinding="{Binding LabelId}" Width="Auto"></GridViewColumn>
                    <GridViewColumn Header="Klasse" DisplayMemberBinding="{Binding Form}" Width="Auto"></GridViewColumn>
                </GridView>
            </ListView.View>
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <EventSetter Event="PreviewMouseDoubleClick" Handler="ListViewItem_PreviewMouseUp"></EventSetter>
                </Style>
            </ListView.ItemContainerStyle>
        </ListView>
        <Button Grid.Row="2" Content="Hinzufügen" VerticalAlignment="Center" Click="AddNew_Click">

        </Button>
    </Grid>
</Window>