Gets or sets the display position of the column relative to the other columns in the DataGrid.
Namespace:System.Windows.Controls Assembly:PresentationFramework (in PresentationFramework.dll) XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Type: System.Int32 The zero-based position of the column, as it is displayed in the associated DataGrid. The registered default is -1. For information about what can influence the value, see DependencyProperty.
The DisplayIndex property has a default value of -1 before it is added to the DataGrid.Columns collection. This value is updated when the column is added to the DataGrid.
The DataGrid requires that the DisplayIndex property of each column must be a unique integer from 0 to the Count of Columns -1. Therefore, when the DisplayIndex of one column changes, the change typically causes the DisplayIndex of other columns to also change.
The restrictions on the DisplayIndex value are enforced by a ValidateValueCallback mechanism. If you attempt to set a value that is not valid, a run-time exception is thrown.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)