在DataGrid的Cell中设置TextTrimming(CharacterEllipsis)

<DataGrid>
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Binding="{Binding Name}">
            <DataGridTextColumn.ElementStyle>
               <Style TargetType="{x:Type TextBlock}">
                   <Setter Property="TextTrimming" Value="CharacterEllipsis"/>
                </Style>
            </DataGridTextColumn.ElementStyle>
        </DataGridTextColumn>
    </DataGrid.Columns>
</DataGrid>