UniformGrid Building a ColumnMajor UniformGrid in WPF(调整Item方向)

http://blogs.claritycon.com/blog/2008/11/building-a-column-major-uniformgrid-in-wpf/

By default, UniformGrid displays it's children as follows:

1 2 3 

4 5 6 

7 8 9

I want to be as follows:

1 4 7 

2 5 8

3 6 9

----------------------------------------------------

   1:  <UniformGrid Rows="2" Columns="4">

   2:      <UniformGrid.LayoutTransform>

   3:          <TransformGroup>

   4:              <RotateTransform Angle="90"/>

   5:              <ScaleTransform ScaleX="-1"/>

   6:          </TransformGroup>

   7:      </UniformGrid.LayoutTransform>

   8:      <Button Background="White" Content="1"/>

   9:      <Button Background="Red" Content="2" Foreground="White"/>

  10:      <Button Background="Orange" Content="3"/>

  11:      <Button Background="Yellow" Content="4"/>

  12:      <Button Background="Green" Content="5" Foreground="White"/>

  13:      <Button Background="Blue" Content="6" Foreground="White"/>

  14:      <Button Background="Violet" Content="7"/>

  15:      <Button Background="Black" Content="8" Foreground="White"/>

  16:  </UniformGrid>

AND

   1:  <Style TargetType="Button">

   2:      <Setter Property="LayoutTransform">

   3:          <Setter.Value>

   4:              <TransformGroup>

   5:                  <RotateTransform Angle="-90"/>

   6:                  <ScaleTransform ScaleY="-1"/>

   7:              </TransformGroup>

   8:          </Setter.Value>

   9:      </Setter>

  10:  </Style>