ASPxGridHeaderFilterEventArgs.CreateShowBlanksValue(String) Method

Creates and returns the (Blanks) filter item used to filter a column by blank values.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v24.2.dll

Declaration

C#

public FilterValue CreateShowBlanksValue(
    string displayText
)

VB.NET

Public Function CreateShowBlanksValue(
    displayText As String
) As FilterValue

Parameters

Name	Type	Description
displayText	String	A String value that specifies the item’s display text.

Returns

Type	Description
FilterValue	Returns the filter item used to filter by blank values.

Remarks

When creating custom filter values by handling the ASPxGridView.HeaderFilterFillItems event, you can use the CreateShowBlanksValue method to create the (Blanks) filter item. The created item can be added to a header filter using the event argument’s ASPxGridHeaderFilterEventArgs.AddValue method.

C#

protected void ASPxGridView1_HeaderFilterFillItems(object sender, DevExpress.Web.ASPxGridViewHeaderFilterEventArgs e)
{
    e.Values.Clear();
    FilterValue showBlanksItem = e.CreateShowBlanksValue("Blank Items");
    e.Values.Add(showBlanksItem);
}