I have a grid where some cells contain text that is too long.  When I autosize the columns, the columns can become too wide for the user (over 3000px). I'd like to implement a simple condition where I have a maximum column width, but only when autosizing.  I'd still like the user to be able to size the column.  However, when I tried to set the width after the resize operation, things didn't quite work out.

I wrote a very simple app to illustrate my point:

<Window x:Class="AutoSizeApp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ig="http://infragistics.com/DataPresenter"
Title="MainWindow" Height="350" Width="525">
<StackPanel Orientation="Vertical">
<Button Click="Button_Click">Auto Resize</Button>
<ig:XamDataPresenter
x:Name="grid"
BindToSampleData="True">
</ig:XamDataPresenter>
</StackPanel>
</Window>

using System.Windows;
using Infragistics.Windows.DataPresenter;

namespace AutoSizeApp
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}

private void Button_Click(object sender, RoutedEventArgs e)
{
foreach (var field in grid.DefaultFieldLayout.Fields)
{
field.PerformAutoSize();

// Works only the first time around.
double max = 10;
if (field.CellWidthResolved > max)
{
field.Settings.Width = new FieldLength(max);
}
}
}
}
}

When I click the Auto Resize button, the first time around the cells will resize, but the max width will be at 10px, as the code intended.  When the button is clicked a second time, and any subsequent time after that, the 10px setting is completely ignored, and the autosize resizes to the text regardless of how long it is.

How can I cap the width of the columns after a PerformAutoSize() call?