GridViewDataColumnSettings.GroupInterval Property

Specifies how the control combines data rows when they are grouped by the current column.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v23.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

[DefaultValue(ColumnGroupInterval.Default)]
public ColumnGroupInterval GroupInterval { get; set; }

VB.NET

<DefaultValue(ColumnGroupInterval.Default)>
Public Property GroupInterval As ColumnGroupInterval

Property Value

Type	Default	Description
ColumnGroupInterval	Default	One of the ColumnGroupInterval enumeration values.

Available values:

Name	Description
Default	For columns which store date/time values, this option is the same as the ColumnGroupInterval.Date option. For non date/time columns this option is the same as the ColumnGroupInterval.Value option.
Value	Rows are grouped by values of grouping columns. The number of groups matches the number of unique values within the grouping column. For date/time columns, both the date and time portions are taken into account for value comparison. To specify how date/time values are presented in group rows in WinForms Data Grid, apply formatting to the grouping column (e.g., with the GridColumn.DisplayFormat property).
Date	This option is in effect only for columns that store date/time values. Rows are grouped by the date part of their values, the time portion is ignored in this grouping mode.
DateMonth	This option is in effect only for columns that store date/time values. Rows are grouped by the month part of their values.
DateYear	This option is in effect only for columns that store date/time values. Rows are grouped by the year part of their values.
DateRange	This option is in effect for columns that store date/time values. Rows are combined into the following non-overlapping groups according to their date value as compared with today’s date: “Beyond Next Month”, “Next Month”, “Later this Month”, “Three Weeks Away”, “Two Weeks Away”, “Next Week”, “Today”, “Tomorrow”, “Yesterday”, “Sunday”, “Monday”, “Tuesday”, “Wednesday”, “Thursday”, “Friday”, “Saturday”, “Last Week”, “Two Weeks Ago”, “Three Weeks Ago”, “Earlier this Month”, “Last Month”, “Older”.
Alphabetical	Rows are grouped by the character that grouping column values start with. Note Not supported in server mode for numeric and date/time columns.
DisplayText	Rows are grouped by display values of the grouping column. In specific instances, column cells can have different edit values, but the same display value. To combine these rows into the same group, use the DisplayText group mode. Note Not supported in server mode.

Property Paths

You can access this nested property as listed below:

Object Type	Path to GroupInterval
GridViewDataColumn	.Settings .GroupInterval

Remarks

Specify the GroupInterval property to define the column’s grouping algorithm.

Use the SortOrder and SortMode properties to specify how the grid sorts group rows.

To apply a custom grouping algorithm, set the SortMode property to Custom and handle the CustomColumnGroup event.

For more information on grouping in the grid, refer to the following topic: ASPxGridView - Group Data.

Limitation

• The grid’s server mode does not support group modes and custom grouping. In this mode, the control groups its data by the values of grouped rows.

Example

The code sample below sets the GroupInterval property to DateYear to group data rows within the Order Date column.

Run Demo: ASPxGridView - IntervalGrouping

ASPX

<dx:ASPxGridView ID="grid" ClientInstanceName="grid" runat="server" KeyFieldName="OrderID" 
    AutoGenerateColumns="False">
    <Columns>
        <dx:GridViewDataTextColumn FieldName="ProductName" />
        <dx:GridViewDataTextColumn FieldName="CategoryName" />
        <dx:GridViewDataTextColumn FieldName="Country" />
        <dx:GridViewDataDateColumn FieldName="OrderDate" GroupIndex="0">
            <Settings GroupInterval="DateYear" />
        </dx:GridViewDataDateColumn>
        <%--...--%>
    </Columns>
    <Settings ShowGroupPanel="True" />
</dx:ASPxGridView>