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我正在尝试实现一个 DevExpress MVC TreeList，它将客户端列表显示为层次结构的第一级。但是当您打开一个客户时，第二级必须显示相关订单的列表以及每个订单的 OrderTotal。

我试图以http://demos.devexpress.com/MVCxTreeListDemos/DataBinding/DataBinding上的演示为基础，这与我正在寻找的类似。我以 Northwind 数据库为例。

TreeList 必须基于的模型必须具体，因为它必须具有以下结构（也许我错了）：

CustomerId、Order.CustomerId、CustomerName、OrderTotal、OrderDate、ShipCity

第二个必须是“ParentId”才能满足层次结构。

这是我的控制器中的内容：

       [ValidateInput(false)]
    public ActionResult OrderTreeListPartial()
    {
        var model = db.Orders.GroupBy(o => o.Customer)
            .Select(group => new
            {
                CustomerId = group.Key.CustomerID,
                ParentId = group.Select(g=>g.CustomerID),
                CustomerName = group.Key.CompanyName,
                OrderTotal = group.Sum(g => g.OrderTotal),
                OrderDate = group.Select(g => g.OrderDate),
                City = group.Select(g => g.ShipCity)
            });

        return PartialView("_OrderTreeListPartial", model);
    }

我的 _OrderTreeListPartial 中有以下内容：

@{
var treeList = Html.DevExpress().TreeList(settings =>
{
    settings.Name = "OrderTreeList";
    settings.CallbackRouteValues = new { Controller = "TreeList", Action = "OrderTreeListPartial" };

    settings.SettingsEditing.AddNewNodeRouteValues = new { Controller = "TreeList", Action = "OrderTreeListPartialAddNew" };
    settings.SettingsEditing.UpdateNodeRouteValues = new { Controller = "TreeList", Action = "OrderTreeListPartialUpdate" };
    settings.SettingsEditing.DeleteNodeRouteValues = new { Controller = "TreeList", Action = "OrderTreeListPartialDelete" };
    settings.SettingsEditing.NodeDragDropRouteValues = new { Controller = "TreeList", Action = "OrderTreeListPartialMove" };

    settings.CommandColumn.Visible = true;
    settings.CommandColumn.NewButton.Visible = true;
    settings.CommandColumn.DeleteButton.Visible = true;
    settings.CommandColumn.EditButton.Visible = true;

    settings.AutoGenerateColumns = false;
    settings.KeyFieldName = "CustomerId";
    settings.ParentFieldName = "ParentId";
    settings.RootValue = 0;

    settings.Columns.Add(
column =>
{
    column.FieldName = "CustomerName";
    }
);
        settings.Columns.Add(
    column =>
    {
        column.FieldName = "OrderDate";
    }
);       
        settings.Columns.Add(
column =>
{
    column.FieldName = "OrderTotal";
    column.PropertiesEdit.DisplayFormatString = "{0:C}";
}
);
        settings.Columns.Add(
    column =>
    {
        column.FieldName = "City";
    }
    );        



   settings.SettingsPager.Visible = true;
        settings.SettingsSelection.Enabled = true;
    });
    if (ViewData["EditError"] != null)
    {
        treeList.SetEditErrorText((string)ViewData["EditError"]);
    }
}
@treeList.Bind(Model).GetHtml()

我认为问题出在控制器中的 LINQ 表达式中。事实上，我不是 LINQ 方面的专家，我正在为未来的项目评估 DevExpress 扩展。任何帮助将不胜感激，无论是在我的 LINQ 中还是在我准备 TreeList 的方式中。

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1 回答 1

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您并没有真正指定您的问题，但我认为您不应该提前进行分组，因为这会导致组列表。

只需创建一个包含“CustomerId”和“ParentId”列的 DataTable。然后 TreeList 将进行分组

于 2015-04-24T11:36:57.680 回答