加入两个模型后如何返回匿名类型答案

【问题标题】：How to return an anonymous type after joining two models加入两个模型后如何返回匿名类型
【发布时间】：2015-10-21 14:27:09
【问题描述】：

我正在开发一个 asp.net mvc-5 Web 应用程序。我有以下动作方法，它在控制器类中返回一个 ActionResult ：-

public ActionResult AutoComplete(string term, string SearchBy)
{
    if (SearchBy == "Tag")
    {
        var tech = repository.AllFindTechnolog(term.Trim()).ToList();
        var resources = repository.GetResources(tech.Select(a => a.IT360ID.Value).ToArray(), false).ToList();
        var query = from techItems in tech
                    join resourcesItems in resources
                    on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                    orderby techItems.PartialTag
                    select new { extra = true, label = techItems.Tag.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = resourcesItems.RESOURCENAME.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

        return Json(query, JsonRequestBehavior.AllowGet);
    }
    else
    {
        var activeResources = repository.FindActiveResourceByName(term.Trim(), true).ToList();//.OrderBy(p => p.RESOURCENAME).Select(a => new { label = a.RESOURCENAME }).ToList();
        var resources = repository.GetResources(activeResources.Select(a => a.RESOURCEID).ToArray(), false).ToList();
        var tech = repository.getTechnologiesByIT360ids(activeResources.Select(a=>a.RESOURCEID).ToArray()).ToList();
        var query = from techItems in tech
                    join resourcesItems in resources
                    on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                    orderby techItems.Tag
                    select new { extra = true, label = resourcesItems.RESOURCENAME.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = techItems.Tag.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

        return Json(query, JsonRequestBehavior.AllowGet);

    }


}

现在我需要将此方法用于另一个控制器类。所以我尝试将此方法移至共享模型类，并从两个操作方法中引用此共享模型类。但我不确定我需要如何定义模型类方法定义。因为我不能/不应该从模型类中返回 ActionResult，所以任何人都可以对此提出建议吗？

【问题讨论】：

为什么不创建一个返回具体类型而不是匿名对象的方法？
@YuvalItzchakov 你能在这方面提供更多建议吗？

标签： c# asp.net asp.net-mvc asp.net-mvc-5

【解决方案1】：

您可能可以清理这部分内容，但可以让您了解可以做什么。创建一个新类并将其命名为有意义的名称.. 我刚刚使用了 MyModel

public class MyModel
{
    public bool extra { get; set; }
    public string label { get; set; }
    public string techtype { get; set; }
    public string status { get; set; }
    public string customername { get; set; }
    public string resourcename { get; set; }
    public string sitename { get; set; }

    public static List<MyModel> AutoComplete(string term, string SearchBy)
    {
        using (var repository = new MyDataContext())
        {
            if (SearchBy == "Tag")
            {
                var tech = repository.AllFindTechnolog(term.Trim()).ToList();
                var resources = repository.GetResources(tech.Select(a => a.IT360ID.Value).ToArray(), false).ToList();
                var query = from techItems in tech
                            join resourcesItems in resources
                            on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                            orderby techItems.PartialTag
                            select new MyModel { extra = true, label = techItems.Tag.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = resourcesItems.RESOURCENAME.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

                return query.ToList();
            }
            else
            {
                var activeResources = repository.FindActiveResourceByName(term.Trim(), true).ToList();//.OrderBy(p => p.RESOURCENAME).Select(a => new { label = a.RESOURCENAME }).ToList();
                var resources = repository.GetResources(activeResources.Select(a => a.RESOURCEID).ToArray(), false).ToList();
                var tech = repository.getTechnologiesByIT360ids(activeResources.Select(a => a.RESOURCEID).ToArray()).ToList();
                var query = from techItems in tech
                            join resourcesItems in resources
                            on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                            orderby techItems.Tag
                            select new MyModel { extra = true, label = resourcesItems.RESOURCENAME.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = techItems.Tag.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

                return query.ToList();
            }
        }
    }
}

现在，当您想在操作结果中使用它时，您只需调用

public ActionResult AutoComplete(string term, string SearchBy)
{
    return Json(MyModel.AutoComplete(term, SearchBy),JsonRequestBehavior.AllowGet); 
}

【讨论】：

【解决方案2】：

构建一个类（视图模型）以供任何对构建 JSON 结果感兴趣的代码使用，如下所示：

public class AutoCompleteViewModel
{
    public bool extra { get; set; }
    public string label { get; set; }
    public string techtype { get; set; }
    public string status { get; set; }
    public string customername { get; set; }
    public string resourcename { get; set; }
    public string sitename { get; set; }
}

现在您可以将 AutoCompleteViewModel 用作构建/填充此对象的单独方法的返回类型，或者在您的操作方法的 LINQ 查询中使用，如下所示：

public ActionResult AutoComplete(string term, string SearchBy)
{
    if (SearchBy == "Tag")
    {
        var tech = repository.AllFindTechnolog(term.Trim()).ToList();
        var resources = repository.GetResources(tech.Select(a => a.IT360ID.Value).ToArray(), 
                                                false).ToList();
        var query = from techItems in tech
                    join resourcesItems in resources
                    on techItems.IT360ID.Value equals resourcesItems.RESOURCEID
                    orderby techItems.PartialTag
                    select new AutoCompleteViewModel { extra = true, 
                                                       label = techItems.Tag.ToString(), 
                                                techtype = techItems.TechnologyType.Name, 
                                      status = resourcesItems.ResourceState.DISPLAYSTATE, 
 customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = resourcesItems.RESOURCENAME.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

    return Json(query, JsonRequestBehavior.AllowGet);
}
else
{
    var activeResources = repository.FindActiveResourceByName(term.Trim(), true).ToList();//.OrderBy(p => p.RESOURCENAME).Select(a => new { label = a.RESOURCENAME }).ToList();
    var resources = repository.GetResources(activeResources.Select(a => a.RESOURCEID).ToArray(), false).ToList();
    var tech = repository.getTechnologiesByIT360ids(activeResources.Select(a=>a.RESOURCEID).ToArray()).ToList();
    var query = from techItems in tech
                join resourcesItems in resources
                on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                orderby techItems.Tag
                select new AutoCompleteViewModel { extra = true, label = resourcesItems.RESOURCENAME.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = techItems.Tag.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

        return Json(query, JsonRequestBehavior.AllowGet);
    }
}

【讨论】：

【解决方案3】：

您可以使用dynamic 作为您的共享模型类返回类型。

样本（未经测试！）：

    public dynamic AutoCompleteService(string term, string SearchBy)
    {
        if (SearchBy == "Tag")
        {
            var tech = repository.AllFindTechnolog(term.Trim()).ToList();
            var resources = repository.GetResources(tech.Select(a => a.IT360ID.Value).ToArray(), false).ToList();
            var query = from techItems in tech
                        join resourcesItems in resources
                        on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                        orderby techItems.PartialTag
                        select new { extra = true, label = techItems.Tag.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = resourcesItems.RESOURCENAME.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

            return query;
        }
        else
        {
            var activeResources = repository.FindActiveResourceByName(term.Trim(), true).ToList();//.OrderBy(p => p.RESOURCENAME).Select(a => new { label = a.RESOURCENAME }).ToList();
            var resources = repository.GetResources(activeResources.Select(a => a.RESOURCEID).ToArray(), false).ToList();
            var tech = repository.getTechnologiesByIT360ids(activeResources.Select(a => a.RESOURCEID).ToArray()).ToList();
            var query = from techItems in tech
                        join resourcesItems in resources
                        on techItems.IT360ID.Value equals resourcesItems.RESOURCEID // join based on db2ID
                        orderby techItems.Tag
                        select new { extra = true, label = resourcesItems.RESOURCENAME.ToString(), techtype = techItems.TechnologyType.Name, status = resourcesItems.ResourceState.DISPLAYSTATE, customername = resourcesItems.ResourceLocation.SiteDefinition.AccountDefinition.ORG_NAME.ToString(), resourcename = techItems.Tag.ToString(), sitename = resourcesItems.ResourceLocation.SiteDefinition.SDOrganization.NAME };

            return query;
        }
    }

并更改控制器的方法

    public ActionResult AutoComplete(string term, string SearchBy)
    {
        return Json(AutoCompleteService(term, SearchBy), JsonRequestBehavior.AllowGet);
    }

【讨论】：