StyleFormatConditionBase.Expression Property

Gets or sets the Boolean expression. When it evaluates to true, the StyleFormatConditionBase.Appearance is applied to data. The Expression property is in effect when the StyleFormatConditionBase.Condition property is set to FormatConditionEnum.Expression.

Namespace: DevExpress.XtraEditors

Assembly: DevExpress.XtraEditors.v20.1.dll

Declaration

[DefaultValue("")]
[XtraSerializableProperty]
public string Expression { get; set; }
<DefaultValue("")>
<XtraSerializableProperty>
Public Property Expression As String

Property Value

Type Default Description
String

String.Empty

A string that specifies the Boolean expression.

Examples

The following example shows how to create a condition to style grid rows, and specify criteria for the condition using a string expression.

The condition's criteria is specified by the StyleFormatConditionBase.Expression property. The expression selects rows that do not contain null in the Region field. Rows that match this condition will be painted in light pink.

The following image shows this condition applied to an XtraGrid control.

StyleCondition_Expression_ex

using DevExpress.XtraGrid;

StyleFormatCondition condition1 = new DevExpress.XtraGrid.StyleFormatCondition();
condition1.Appearance.BackColor = Color.SeaShell;
condition1.Appearance.Options.UseBackColor = true;
condition1.Condition = FormatConditionEnum.Expression;
condition1.Expression = "[Region] != ?";
gridView1.FormatConditions.Add(condition1);
See Also