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MultiSortModifierKey Property

Gets/sets the modifier key that is pressed to include additional columns in a multi-column sort operation.
Syntax
'Declaration
 
Public Property MultiSortModifierKey As Keys
public Keys MultiSortModifierKey {get; set;}
Remarks

To maintain compatibility with the Infragistics UltraGrid control, pressing the Shift key while clicking a sortable column header will prevent the UltraTreeColumnSet.SortedColumns collection from being cleared before the new column is added, effective extending the sort operation to include the clicked column.

Since there is no standard Windows keystroke for extending column sorting, the MultiSortModifierKey enables the end developer to specify any modifier key to be designated as the key which extends a column sorting operation.

The standard modifier keys (Alt, Control, and Shift) can be assigned to the MultiSortModifierKey property, but any other value will cause an exception to be thrown.

Example
The following code sample demonstrates how to use the properties of the UltraTreeColumnSettings object to control the appearance and behavior of all columns displayed by the UltraTree control.

Imports Infragistics.Win
Imports Infragistics.Win.Layout
Imports Infragistics.Win.UltraWinTree

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim columnSettings As UltraTreeColumnSettings = Me.ultraTree1.ColumnSettings

        '	Disallow cell sizing for all columns in the Columns collection
        columnSettings.AllowCellSizing = LayoutSizing.None

        '	Disallow cell span sizing for all columns in the Columns collection
        columnSettings.AllowCellSpanSizing = GridBagLayoutAllowSpanSizing.None

        '	Disallow moving for all columns in the Columns collection
        columnSettings.AllowColMoving = GridBagLayoutAllowMoving.None

        '	Disallow header sizing for all columns in the Columns collection
        columnSettings.AllowLabelSizing = LayoutSizing.None

        '	Disallow header span sizing for all columns in the Columns collection
        columnSettings.AllowLabelSpanSizing = GridBagLayoutAllowSpanSizing.None

        '	Disallow sorting for all columns in the Columns collection
        columnSettings.AllowSorting = DefaultableBoolean.False

        '	If the ViewStyle is OutlookExpress, set AutoFitColumns to 'ResizeAllColumns'.
        If Not columnSettings.Control Is Nothing AndAlso columnSettings.Control.ViewStyleResolved = ViewStyle.OutlookExpress Then
            columnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns
        End If


        '	Don't display cell borders for any columns in the Columns collection
        columnSettings.BorderStyleCell = UIElementBorderStyle.None

        '	Don't display header borders for any columns in the Columns collection
        columnSettings.BorderStyleColumnHeader = UIElementBorderStyle.None

        '	Set the BackColor for all cells in all columns to 'Control'
        columnSettings.CellAppearance.BackColor = SystemColors.Control

        '	Set CellWrapText to False to prevent text from
        '	wrapping to additional lines in all columns
        columnSettings.CellWrapText = DefaultableBoolean.False

        '	Set ColumnAutoSizeMode to 'VisibleNodes' so that when the end
        '	user auto-sizes a column, only currently visible cells are considered
        columnSettings.ColumnAutoSizeMode = ColumnAutoSizeMode.VisibleNodes

        '	Set the HeaderStyle property to 'Standard', so that column headers
        '	are not themed, and set the BackColor of the ColumnHeaderAppearance
        '	to 'ControlDark'.
        columnSettings.HeaderStyle = HeaderStyle.Standard
        columnSettings.ColumnHeaderAppearance.BackColor = SystemColors.ControlDark

        '	Change the size of images displayed in the headers to 20w X 20h
        columnSettings.ColumnHeaderImageSize = New Size(20, 20)

        '	Set the LabelPosition property ot display headers on top of cells,
        '	and set the LabelStyle property to display headers and cells
        '	separately.
        columnSettings.LabelPosition = NodeLayoutLabelPosition.Top
        columnSettings.LabelStyle = NodeLayoutLabelStyle.Separate

        '	Assign the control key as the multi-sort extension key
        columnSettings.MultiSortModifierKey = Keys.Control

        '	Set the NullText property to "[NULL]" so that null values in any
        '	cell for all columns is displayed the same way.
        columnSettings.NullText = "[NULL]"

        '	Show sort indicators for all columns
        columnSettings.ShowSortIndicators = DefaultableBoolean.True
    End Sub
using Infragistics.Win;
using Infragistics.Win.Layout;
using Infragistics.Win.UltraWinTree;
using System.Diagnostics;


		private void button1_Click(object sender, System.EventArgs e)
		{			
			UltraTreeColumnSettings columnSettings = this.ultraTree1.ColumnSettings;
			
			//	Disallow cell sizing for all columns in the Columns collection
			columnSettings.AllowCellSizing = LayoutSizing.None;

			//	Disallow cell span sizing for all columns in the Columns collection
			columnSettings.AllowCellSpanSizing = GridBagLayoutAllowSpanSizing.None;

			//	Disallow moving for all columns in the Columns collection
			columnSettings.AllowColMoving = GridBagLayoutAllowMoving.None;

			//	Disallow header sizing for all columns in the Columns collection
			columnSettings.AllowLabelSizing = LayoutSizing.None;

			//	Disallow header span sizing for all columns in the Columns collection
			columnSettings.AllowLabelSpanSizing = GridBagLayoutAllowSpanSizing.None;

			//	Disallow sorting for all columns in the Columns collection
			columnSettings.AllowSorting = DefaultableBoolean.False;

			//	If the ViewStyle is OutlookExpress, set AutoFitColumns to 'ResizeAllColumns'.
			if ( columnSettings.Control != null &&
				 columnSettings.Control.ViewStyleResolved == ViewStyle.OutlookExpress )
				columnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns;

			//	Don't display cell borders for any columns in the Columns collection
			columnSettings.BorderStyleCell = UIElementBorderStyle.None;

			//	Don't display header borders for any columns in the Columns collection
			columnSettings.BorderStyleColumnHeader = UIElementBorderStyle.None;

			//	Set the BackColor for all cells in all columns to 'Control'
			columnSettings.CellAppearance.BackColor = SystemColors.Control;

			//	Set CellWrapText to False to prevent text from
			//	wrapping to additional lines in all columns
			columnSettings.CellWrapText = DefaultableBoolean.False;

			//	Set ColumnAutoSizeMode to 'VisibleNodes' so that when the end
			//	user auto-sizes a column, only currently visible cells are considered
			columnSettings.ColumnAutoSizeMode = ColumnAutoSizeMode.VisibleNodes;

			//	Set the HeaderStyle property to 'Standard', so that column headers
			//	are not themed, and set the BackColor of the ColumnHeaderAppearance
			//	to 'ControlDark'.
			columnSettings.HeaderStyle = HeaderStyle.Standard;
			columnSettings.ColumnHeaderAppearance.BackColor = SystemColors.ControlDark;

			//	Change the size of images displayed in the headers to 20w X 20h
			columnSettings.ColumnHeaderImageSize = new Size( 20, 20 );
						
			//	Set the LabelPosition property ot display headers on top of cells,
			//	and set the LabelStyle property to display headers and cells
			//	separately.
			columnSettings.LabelPosition = NodeLayoutLabelPosition.Top;
			columnSettings.LabelStyle = NodeLayoutLabelStyle.Separate;

			//	Assign the control key as the multi-sort extension key
			columnSettings.MultiSortModifierKey = Keys.Control;

			//	Set the NullText property to "[NULL]" so that null values in any
			//	cell for all columns is displayed the same way.
			columnSettings.NullText = "[NULL]";

			//	Show sort indicators for all columns
			columnSettings.ShowSortIndicators = DefaultableBoolean.True;	
		}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also