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FilterValue.CreateShowBlanksValue(GridViewDataColumn, 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

NuGet Package: DevExpress.Web

#Declaration

public static FilterValue CreateShowBlanksValue(
    GridViewDataColumn column,
    string text
)

#Parameters

Name Type Description
column GridViewDataColumn

A GridViewDataColumn object that is the data column.

text 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.

#Example

using DevExpress.Web.ASPxGridView;
...
protected void ASPxGridView1_HeaderFilterFillItems(object sender, DevExpress.Web.ASPxGridViewHeaderFilterEventArgs e) {
     e.Values.Clear();
     FilterValue showAllItem = FilterValue.CreateShowAllValue("Show All");
     e.Values.Add(showAllItem);
     FilterValue showBlanksItem = FilterValue.CreateShowBlanksValue(e.Column, "Show Blanks");
     e.Values.Add(showBlanksItem);
     FilterValue showNonBlanksItem = FilterValue.CreateShowNonBlanksValue(e.Column, "Show non Blanks");
     e.Values.Add(showNonBlanksItem);
     ...
    }
See Also