/// <summary>
/// Identifies a cell at the column within the row for the specified item.
/// </summary>
/// <param name="item">The item who's row contains the cell.</param>
/// <param name="column">The column of the cell within the row.</param>
/// <remarks>
/// This constructor will not tie the DataGridCellInfo to any particular
/// DataGrid.
/// </remarks>
public DataGridCellInfo(object item, DataGridColumn column)
{
if (column == null)
{
throw new ArgumentNullException("column");
}
_info = new ItemsControl.ItemInfo(item);
_column = column;
_owner = null;
}
/// <summary>
/// Used to create an unset DataGridCellInfo.
/// </summary>
internal DataGridCellInfo(object item)
{
Debug.Assert(item == DependencyProperty.UnsetValue, "This should only be used to make an Unset CellInfo.");
_info = new ItemsControl.ItemInfo(item);
_column = null;
_owner = null;
}