TreeListOptionsColumnFilter.ShowBlanksFilterItems Property

Gets or sets whether the value list and value checklist in the pop-up filter menu contain the (Blanks) and (Non Blanks) filter conditions.

Namespace: DevExpress.XtraTreeList.Columns

Assembly: DevExpress.XtraTreeList.v21.2.dll

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

Declaration

C#

[DefaultValue(DefaultBoolean.Default)]
[XtraSerializableProperty]
public virtual DefaultBoolean ShowBlanksFilterItems { get; set; }

VB.NET

<DefaultValue(DefaultBoolean.Default)>
<XtraSerializableProperty>
Public Overridable Property ShowBlanksFilterItems As DefaultBoolean

Property Value

Type	Default	Description
DefaultBoolean	Default	True if the (Blanks) and (Non Blanks) filter conditions are displayed; False if not. Default if the visibility depends on whether the current column contains Null or DBNull values.

Available values:

Name	Description
True	true. DefaultBoolean.True has a constant value of 0, while the standard true value corresponds to a value of 1. In Visual Basic, do not use implicit conversion of Boolean values to DefaultBoolean, and vice versa, as the conversion may produce incorrect results.
False	false. DefaultBoolean.False has a constant value of 1, while the standard false value corresponds to a value of 0. In Visual Basic, do not use implicit conversion of Boolean values to DefaultBoolean, and vice versa, as the conversion may produce incorrect results.
Default	The default behavior determined by the control’s logic.

Property Paths

You can access this nested property as listed below:

Object Type	Path to ShowBlanksFilterItems
TreeListColumn	.OptionsFilter .ShowBlanksFilterItems

Remarks

The value list and value checklist in the pop-up filter menu can contain the (Blanks) and (Non Blanks) filter conditions that select records with and without Null, DBNull, and empty string values in the current column.

Note

The value checklist supports only the (Blanks) filter condition - (Non Blanks) is not supported.