Silverlight下，另一种比较土的办法，来动态加载不同的Column

public void AddNewColumn(string path)
{
    DataGridTemplateColumn column = new DataGridTemplateColumn() { Header = path, SortMemberPath=path };

    StringBuilder sb = new StringBuilder();
    sb.Append(@"                
        <DataTemplate                  
            xmlns='http://schemas.microsoft.com/client/2007'                   
            xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'                  
            >                    
           <TextBlock Tag='");
    sb.Append(path);
    sb.Append(@"' Text='{Binding ");
    sb.Append(path);
    sb.Append(@"}' ");
    sb.Append(@"/>
        </DataTemplate>");

    column.CellTemplate = XamlReader.Load(sb.ToString()) as DataTemplate;
    
    FlightPlanning.Columns.Add(column);
}

要看高级的办法：请参见:Silverlight模拟WPF的TemplateSelector，以实现动态显示不同column