_GridViewPartial.cshtml

@{
    var grid = Html.DevExpress().GridView(settings =>
    {
        settings.Name = "GridView";
        settings.CallbackRouteValues = new { Controller = "Home", Action = "GridViewPartial" };
        settings.SettingsEditing.BatchUpdateRouteValues = new { Controller = "Home", Action = "BatchUpdatePartial" };
        settings.SettingsEditing.Mode = GridViewEditingMode.Batch;

        settings.CommandColumn.Visible = true;
        settings.CommandColumn.ShowDeleteButton = true;
        settings.CommandColumn.ShowNewButtonInHeader = true;
        settings.KeyFieldName = "ID";

        settings.ClientSideEvents.BatchEditEndEditing = "OnBatchEditEndEditing";

        settings.Columns.Add(column =>
        {
            column.FieldName = "Quantity";
            column.ColumnType = MVCxGridViewColumnType.SpinEdit;
            SpinEditProperties prop = column.PropertiesEdit as SpinEditProperties;
            prop.MinValue = 0;
            prop.MaxValue = 9999;
        });
        settings.Columns.Add(column =>
        {
            column.FieldName = "Price";
            column.ColumnType = MVCxGridViewColumnType.SpinEdit;
            SpinEditProperties prop = column.PropertiesEdit as SpinEditProperties;
            prop.MinValue = 0;
            prop.MaxValue = 9999;
        });

        settings.Columns.Add(column =>
        {
            column.UnboundType = DevExpress.Data.UnboundColumnType.Decimal;
            column.FieldName = "Sum";
            column.ReadOnly = true;
            column.Settings.ShowEditorInBatchEditMode = false;
          
        });

        settings.CustomUnboundColumnData = (sender, e) =>
        {
            if (e.Column.FieldName == "Sum")
            {
                decimal price = Convert.ToDecimal(e.GetListSourceFieldValue("Price"));
                int quantity = Convert.ToInt32(e.GetListSourceFieldValue("Quantity"));
                e.Value = price * quantity;
            }
        };

        settings.CellEditorInitialize = (s, e) =>
        {
            ASPxEdit editor = (ASPxEdit)e.Editor;
            editor.ValidationSettings.Display = Display.Dynamic;
        };
     

    });
    if (ViewData["EditError"] != null)
    {
        grid.SetEditErrorText((string)ViewData["EditError"]);
    }
}
@grid.Bind(Model).GetHtml()