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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.v24.1.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