TreeListOptionsColumn.FixedWidth Property

Gets or sets whether the column’s width remains the same when the column’s auto width feature is enabled.

Namespace: DevExpress.XtraTreeList.Columns

Assembly: DevExpress.XtraTreeList.v25.2.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.TreeList

Declaration

C#

[DefaultValue(false)]
[XtraSerializableProperty]
public virtual bool FixedWidth { get; set; }

VB.NET

<DefaultValue(False)>
<XtraSerializableProperty>
Public Overridable Property FixedWidth As Boolean

Property Value

Type	Default	Description
Boolean	false	true if the column’s width remains the same when the column’s auto width feature is enabled; otherwise, false.

Property Paths

You can access this nested property as listed below:

Object Type	Path to FixedWidth
TreeListColumn	.OptionsColumn .FixedWidth

Remarks

Use this property to keep a column at a constant width when TreeListOptionsView.AutoWidth is active and the control size changes.

The following code snippet enables automatic column width calculation and keeps one column fixed:

C#

using DevExpress.XtraTreeList;
using DevExpress.XtraTreeList.Columns;

TreeListColumn productNameColumn = treeList.Columns["ProductName"];
treeList.OptionsView.AutoWidth = true;
productNameColumn.OptionsColumn.FixedWidth = true;

VB.NET

Imports DevExpress.XtraTreeList
Imports DevExpress.XtraTreeList.Columns

Dim productNameColumn As TreeListColumn = treeList.Columns("ProductName")
treeList.OptionsView.AutoWidth = True
productNameColumn.OptionsColumn.FixedWidth = True

To prevent a user from resizing this column at runtime, disable TreeListOptionsColumn.AllowSize. To limit the width instead of fully locking it, use TreeListColumn.MinWidth and TreeListColumn.MaxWidth.

Note

When FixedWidth is active for a column and a user drags the preceding column’s right edge, only the preceding column is resized.

This occurs because the FixedWidth property affects passive resizing (resizing triggered by changes to another column or the control itself). The actively resized column is the preceding column, so the column with FixedWidth enabled cannot change its width in response to changes to other columns, and the preceding column absorbs the size adjustment.