xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:StudentProsjekt" x:Class="StudentProsjekt.MainWindow"
        Title="MainWindow" Height="386" Width="567">
   <Grid >
      <Grid.ColumnDefinitions>
         <ColumnDefinition Width="Auto"/>
         <ColumnDefinition Width="*"/>
      </Grid.ColumnDefinitions>
      <Grid.RowDefinitions>
         <RowDefinition Height="Auto" />
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="*"/>
      </Grid.RowDefinitions>
      <GroupBox Header="Student search" Grid.Column="0" Grid.Row="0">
         <StackPanel Grid.Column="0" Grid.Row="0" Orientation="Horizontal">
            <TextBox x:Name="Student_Textbox" Width="Auto" MinWidth="100" TextChanged="on_TextChanged"/>
         </StackPanel>
      </GroupBox>
      <StackPanel Grid.Column="0" Grid.Row="1">
         <GroupBox Header="Courses">
            <ComboBox x:Name="course_ComboBox" Width="Auto" MinWidth="100" HorizontalAlignment="Stretch"/>
         </GroupBox>
      </StackPanel>

      <StackPanel Grid.Column="0" Grid.Row="2">
         <GroupBox Header="Grades">
            <ComboBox x:Name="grades_ComboBox" Width="Auto" MinWidth="100" HorizontalAlignment="Stretch"/>
         </GroupBox>
      </StackPanel>
      <StackPanel Grid.Column="0" Grid.Row="3">
         <GroupBox Header="Students that failed">
            <Button Width="Auto" Height="Auto" Content="Show"/>
         </GroupBox>
      </StackPanel>

      <ListView Grid.Column="1" Grid.Row="0" Grid.RowSpan="5" Background="AntiqueWhite" x:Name="studentListView" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="Auto" MinHeight="250" MinWidth="150" Width="Auto"  >
         <ListView.View>
            <GridView x:Name="GridView">
               <!--
               <GridViewColumn Header="Navn" Width="auto" DisplayMemberBinding="{Binding studentname}"/>
               <GridViewColumn Header="Age" Width="auto" DisplayMemberBinding="{Binding studentage}"/>
               <GridViewColumn Header="Grade" Width="auto" DisplayMemberBinding="{Binding grade}" />
               -->
            </GridView>
         </ListView.View>

      </ListView>

   </Grid>
</Window>