如何拉伸ListView项目宽度以填充父容器？

Question

How to stretch listview items width to fill parent container?

The default behaviour seems to be squishing everything as narrow as possible.

Answer 1

The problem is not with the child item but with the itemcontainer which has a HorizontalAlignment=Left hidden somewhere deep inside the framework code. Only after fixing this will you get the behaviour one would expect to be there by default.

<ListView.ItemContainerStyle>
  <Style TargetType="ListViewItem">
    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
  </Style>
</ListView.ItemContainerStyle>

<GroupStyle.HeaderContainerStyle >
  <Style TargetType="ListViewHeaderItem">
    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
  </Style>
</GroupStyle.HeaderContainerStyle>