OptionsColumnFilter.ShowBlanksFilterItems Property

Gets or sets whether the column’s Filter Dropdown (when presented as a Regular List or Checked List) displays the “(Blanks)” and “(Non Blanks)” filter items.

Namespace: DevExpress.XtraGrid.Columns

Assembly: DevExpress.XtraGrid.v21.2.dll

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

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	A DefaultBoolean value that specifies whether the column’s Filter Dropdown displays the “(Blanks)” and “(Non Blanks)” filter items.

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
GridColumn	.OptionsFilter .ShowBlanksFilterItems

Remarks

The paint style of a column’s Filter Dropdown is specified by the OptionsColumnFilter.FilterPopupMode property. When the Filter Dropdown is painted as a Regular List or Checked List, it may contain the “(Blanks)” and “(Non Blanks)” items used to filter records that contain Null (DBNull) values and empty strings.

If the ShowBlanksFilterItems property is set to Default, the “(Blanks)” and “(Non Blanks)” items are present in the Filter Dropdown if the View’s data source contains records with Null or DBNull in the current column. If the ShowBlanksFilterItems property is set to True, the “(Blanks)” and “(Non Blanks)” filter items are always available in the Filter Dropdown. Set the ShowBlanksFilterItems property to False to forcibly hide the “(Blanks)” and “(Non Blanks)” filter items.

Note

For the Filter Dropdown painted as a Checked List, the “(Non Blanks)” item is not supported. The Checked Filter Dropdown supports only the “(Blanks)” item.