# SummaryItemType Enum | WinForms Controls | DevExpress Documentation

# SummaryItemType Enum

Specifies summary type to calculate against a group of column cells.

**Namespace**: [DevExpress.XtraTreeList](/WindowsForms/DevExpress.XtraTreeList)

        **Assembly**:
        DevExpress.XtraTreeList.v26.1.dll

## Declaration

- C#
- VB.NET

                        <section id="tabpanel_syntax_tabid_DevExpress.XtraTreeList.SummaryItemType-csharp" role="tabpanel" data-tab="tabid-csharp" class="tab-group__tab-content tab-group__tab-content--code" style="display: block">
                            <pre><code class="lang-csharp hljs">public enum SummaryItemType</code></pre>
                        </section>
                        <section id="tabpanel_syntax_tabid_DevExpress.XtraTreeList.SummaryItemType-vb" role="tabpanel" data-tab="tabid-vb" class="tab-group__tab-content tab-group__tab-content--code" style="display: none">
                            <pre><code class="lang-vb hljs">Public Enum SummaryItemType</code></pre>
                        </section>

## Members

| Name | Description |
| --- | --- |
| `Sum` | Calculates the sum of field values within a group of column cells. |
| `Min` | Retrieves the minimum value within a group of column cells. |
| `Max` | Retrieves the maximum value within a group of column cells. |
| `Count` | Calculates the number of nodes within a group of column cells. |
| `Average` | Calculates the average field value within a group of column cells. |
| `Custom` | Allows a user to define a custom summary value by handling the [TreeList.GetCustomSummaryValue](/WindowsForms/DevExpress.XtraTreeList.TreeList.GetCustomSummaryValue) event. |
| `None` | Summary is not calculated. |

## Related API Members

The following properties accept/return **SummaryItemType** values:

- [CustomDrawFooterCellEventArgs.ItemType](/WindowsForms/DevExpress.XtraTreeList.CustomDrawFooterCellEventArgs.ItemType)
- [TreeListColumn.RowFooterSummary](/WindowsForms/DevExpress.XtraTreeList.Columns.TreeListColumn.RowFooterSummary)
- [TreeListColumn.SummaryFooter](/WindowsForms/DevExpress.XtraTreeList.Columns.TreeListColumn.SummaryFooter)
- [TreeListMenuItemClickEventArgs.SummaryType](/WindowsForms/DevExpress.XtraTreeList.TreeListMenuItemClickEventArgs.SummaryType)

See Also

[DevExpress.XtraTreeList Namespace](/WindowsForms/DevExpress.XtraTreeList)