剃刀模板中的动态类型列表

发布于 2024-10-31 02:19:54 字数 802 浏览 0 评论 0原文

// this function working perfectly
public dynamic CountTable()
{
    return (from t in db.Users
            group t by t.Type into g
            select new
            {
                type = g.Key,
                count = g.Count(),
                ActiveGroups = (from t in g group t by t.Active into ag select new { active = ag.Key, count = ag.Count() })
            }).ToList();
}

    // and this loop working in MVC Controller
    foreach (dynamic uct in ur.CountTable())
    {
        int x = uct.count;
    }

但在模板中不起作用：

Line 12: @foreach (dynamic uct in ViewBag.ur.CountTable())
Line 13: {
Line 14:     int adet = uct.count;
Line 15: }

第 14 行：“对象”不包含“计数”的定义

为什么？我能做些什么？

原文

// this function working perfectly
public dynamic CountTable()
{
    return (from t in db.Users
            group t by t.Type into g
            select new
            {
                type = g.Key,
                count = g.Count(),
                ActiveGroups = (from t in g group t by t.Active into ag select new { active = ag.Key, count = ag.Count() })
            }).ToList();
}

    // and this loop working in MVC Controller
    foreach (dynamic uct in ur.CountTable())
    {
        int x = uct.count;
    }

But not working in template:

Line 12: @foreach (dynamic uct in ViewBag.ur.CountTable())
Line 13: {
Line 14:     int adet = uct.count;
Line 15: }

Line 14: 'object' does not contain a definition for 'count'

Why? What can I do?

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习ぎ惯性依靠 2024-11-07 02:19:54

匿名类型被编译成内部类。

dynamic 使用的标准绑定器将仅绑定到公共类的公共成员。
因此，您不能将其与来自不同程序集的匿名类型一起使用。

有关详细信息，请参阅此处。

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帝王念 2024-11-07 02:19:54

~~不能肯定地说，因为我从不使用动态，但我怀疑这是剃刀视图引擎不支持的情况。尽管您可以拥有动态模型并直接调用其属性。~~

例如，以下内容有效：
@foreach (dynamic uct in new[] { new { Name = "foo" } }) { <div>@uct.Name</div> }
但如果我们将其移至其他地方的某个静态方法中：
@foreach (dynamic uct in Foo.SomeStaticMethod()) { <div>@uct.Name</div> }

~~它不再有效，因为我怀疑 razor 会自动转换为对象。~~

我建议您定义几种类型并使用强类型，而不是使用动态。

Cannot say for sure as I never use dynamic but I suspect that this is a situation which is not supported by the razor view engine. Although you can have a dynamic model and directly invoke properties on it.

For example the following works:
@foreach (dynamic uct in new[] { new { Name = "foo" } }) { <div>@uct.Name</div> }
but if we move this into some static method somewhere else:
@foreach (dynamic uct in Foo.SomeStaticMethod()) { <div>@uct.Name</div> }

~~it no longer works as I suspect razor converts automatically to object.~~

Instead of using dynamic I would recommend you defining a couple of types and work with strong types.

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~没有更多了~