You need to put the GridView
inside a Grid
<window x:class="AnalyzeSMlogs.ListViewTest" xmlns:x="#unknown">
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Some Game Data" WindowStartupLocation="CenterScreen" WindowState="Maximized" >
<grid>
<listview itemssource="{Binding GameCollection}">
<listview.view>
<gridview>
<gridviewcolumn width="140" header="Game Name">
DisplayMemberBinding="{Binding GameName}" />
<gridviewcolumn width="140" header="Creator">
DisplayMemberBinding="{Binding Creator}" />
<gridviewcolumn width="140" header="Publisher">
DisplayMemberBinding="{Binding Publisher}" />
</gridviewcolumn></gridviewcolumn></gridviewcolumn></gridview>
</listview.view>
</listview>
</grid>
</window>