在 sql asp.net mvc 5 中使用 linq 时如何格式化记录中的数据？

Posted 2023-04-12

【中文标题】在 sql asp.net mvc 5 中使用 linq 时如何格式化记录中的数据？

【英文标题】：How to format your data on a record when using linq in sql asp.net mvc 5?

【发布时间】：2021-07-19 21:13:13

【问题描述】：

我有一个电子表格并且有数据，但问题是我的数据是错误的，但它没有按照要求格式化，需要一些帮助。这是我对这个应用程序的逻辑。 sql 查询是针对 1 个数据库上 3 个不同表的数据库中我的记录列表，控制器和模型用于我的逻辑以根据我的要求生成以下图像。

// SQL query


  SELECT TOP (1000) [WeekId]
          ,[WeekNum]
          ,[Year]
          ,[CreatedDate]
          ,[CreatedBy]
          ,[ModifiedDate]
          ,[ModifiedBy]
          ,[InActive]
      FROM [ProductionManagement].[Schedule].[Week]
    SELECT TOP (1000) [ProductionDayId]
          ,[WeekId]
          ,[ProductionDate]
          ,[DayOfWeek]
          ,[CreatedDate]
          ,[CreatedBy]
          ,[ModifiedDate]
          ,[ModifiedBy]
          ,[InActive]
      FROM [ProductionManagement].[Schedule].[ProductionDay]
    SELECT TOP (1000) [ModelId]
          ,[Name]
          ,[Code]
          ,[CreatedDate]
          ,[CreatedBy]
          ,[ModifiedDate]
          ,[ModifiedBy]
          ,[InActive]
      FROM [ProductionManagement].[Schedule].[Model]
    
    // controller
           public IList<ExtractionViewModel> GetExtractionViewModels()
            
                 var db = new ProductionManagementEntities();
    
                var scheduleList = (from p in db.ProductionDays
                                    from m in db.Models
                                    join w in db.Weeks on p.WeekId equals w.WeekId
                                    orderby w.Year ascending
                                    orderby m.Name descending
                                    where(m.InActive == true)
                           
    
                                    select new ExtractionViewModel
                                    
    
                                        Year = w.Year,
                                        Week = w.WeekNum,
                                        Day = p.ProductionDate,
                                        VW250 = m.Name,
                                        VW270 = m.Name,
                                        VW2502PA = m.Name,
                                        VW270PA = m.Name
    
    
                                    ).ToList();
             
                
    
               
                return scheduleList;
            
      public class ExtractionViewModel
        
            public string Year  get; set; 
    
            public int Week  get; set; 
    
            
            [DataType(DataType.Date)]
            [DisplayFormat(DataFormatString = "0;yyyy-MM-dd", ApplyFormatInEditMode =false)]
            public DateTime Day  get; set; 
    
            public string VW250  get; set; 
    
            public string VW270  get; set; 
    
            public string VW2502PA  get; set; 
    
            public string VW270PA  get; set; 
        

【问题讨论】：

@mjwills，要求年份必须是今年，如果有一周可用，则周必须显示 9，如果今年/日有记录，则型号必须为 79。

@mjwills 输出我已将其附加到我的最后一个代码中，作为图像。这是我作为 excel 的输出。

不同的是我的输出和它应该做的不一样，我必须产生的输出必须和要求一样，希望我有意义。这就是我现在卡住的地方。

我不明白你的意思。祝你一切顺利。

为什么 m.Name 对于所有值都相同：VW250 = m.Name, VW270 = m.Name, VW2502PA = m.Name, VW270PA = m.Name

【参考方案1】：

尝试以下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace ConsoleApplication

    public class Program
    
        
        public static void Main(string[] args)
        

            var db = new ProductionManagementEntities();
    
            var scheduleList = (from p in db.ProductionDays.OrderBy(x => x.CreatedDate)
                                join w in db.Weeks on p.WeekId equals w.WeekId
                                join m in db.Models.Where(x =>x.InActive == false) on p.CreatedDate equals m.CreatedDate
                                select new  p = p, w = w, m = m
                                ).GroupBy(x => x.p.CreatedDate)
                                .Select(x => new ExtractionViewModel() 
                                        Year = x.Key.Year,
                                        Week = x.FirstOrDefault().w.WeekId,
                                        Day = x.FirstOrDefault().p.ProductionDate,
                                        VW250 = x.Where(y => y.m.Name == "VM250").Count(),
                                        VW270 = x.Where(y => y.m.Name == "VM270").Count(),
                                        VW2502PA = x.Where(y => y.m.Name == "VM2502PA").Count(),
                                        VW270PA = x.Where(y => y.m.Name == "VM270PA").Count()    
                                 ).ToList();
            
    
    public class ProductionManagementEntities
    
        public List<Week> Weeks  get;set;
        public List<ProductionDay> ProductionDays  get;set;
        public List<Model> Models  get;set;
    

    public class Week
    
        public int WeekId  get;set;
        public DateTime CreatedDate  get;set;
        public string CreatedBy  get;set;
        public DateTime ModifiedDate  get;set;
        public string ModifiedBy  get;set;
        public Boolean InActive  get;set;
    
    public class ProductionDay
    
        public int WeekId  get;set;
        public DateTime ProductionDate  get;set;
        public DayOfWeek DayOfWeek  get;set;
        public DateTime CreatedDate  get;set;
        public string CreatedBy  get;set;
        public DateTime ModifiedDate  get;set;
        public string ModifiedBy  get;set;
        public Boolean InActive  get;set;
    
    public class Model
    
        public string Name  get; set; 
        public int Code  get; set; 
        public DateTime CreatedDate  get; set; 
        public string CreatedBy  get; set; 
        public DateTime ModifiedDate  get; set; 
        public string ModifiedBy  get; set; 
        public Boolean InActive  get; set; 
    
    

    public class ExtractionViewModel
    
        public int Year  get; set; 
        public int Week  get; set; 
        public DateTime Day  get; set; 
        public int VW250  get; set; 
        public int VW270  get; set; 
        public int VW2502PA  get; set; 
        public int VW270PA  get; set;