Question

我有以下功能返回匿名类型。

public IQueryable<TabMasterViewModel> GetJsonTabMasterList(string OrderByColumn, string OrderType, int PageSize, int CurrentPage)
        {
            IQueryable<TabMaster> tabmasters = _tabmasterRepository.GetQueryable().OrderUsingSortExpression(OrderByColumn + " " + OrderType).Skip((CurrentPage - 1) * PageSize).Take(PageSize);
            var jsonData = new
            {
                total = 1,//totalPages,
                page = 1,//page,
                records = 14, //totalRecords,
                rows = (from tm in tabmasters
                        select new
                        {
                            id = tm.colID,
                            cell = new string[] { tm.colID.ToString(), tm.FirstName, tm.LastName }
                        }).ToArray()
            };
            return jsonData;
        }

但它会给我一个错误：无法隐式转换类型'AnonymousType＃1' 'System.Linq.IQueryable'

我对以下行中的定义返回类型函数感到困惑

public IQueryable<TabMasterViewModel> ...

Answer 1

如果你想要某种类型，你可以创建一个名为

的类或结构


public class TabMasterDataInfo
{
 public int Total {get;set;}
 public int Page {get;set;}
 public int Records {get;set;}
 public IEnumerable Rows {get;set;}
}

然后


 var jsonData = new TabMasterDataInfo()
            {
                Total = 1,//totalPages,
                Page = 1,//page,
                Records = 14, //totalRecords,
                Rows = (from tm in tabmasters
                        select new
                        {
                            id = tm.colID,
                            cell = new string[] { tm.colID.ToString(), tm.FirstName, tm.LastName }
                        }).ToArray()
            };

然后您的方法返回，然后键入TabMasterDataInfo

public TabMasterDataInfo GetJsonTabMasterList(string OrderByColumn, string OrderType, int PageSize, int CurrentPage)

这是一个粗略的想法反正..假设你想要一个类型返回（我更喜欢'对象' - 然后没有猜测它的强类型。

Answer 2

以下是解决方案：

public JsonResult GetGridData(string sidx, string sord, int rows, int page)
        {
            int totalRecords = Convert.ToInt32(_tabmasterService.Count());
            int totalPages = (int)Math.Ceiling((float)totalRecords / (float)rows);
            IQueryable<TabMasterViewModel> tabmasters = _tabmasterService.GetQueryTabMasterList(sidx, sord, rows, page);
            var jsonData = new
            {
                total = totalPages,
                page = page,
                records = totalRecords,
                rows = (from tm in tabmasters
                        select new
                        {
                            id = tm.colID,
                            cell = new string[] { tm.colID.ToString(), tm.FirstName, tm.LastName }
                        }).ToArray()
            };
            return Json(jsonData, JsonRequestBehavior.AllowGet);
        }

无法返回匿名类型

2 个答案: