尝试正确设置 2 个 csv 文件匹配的查询卡住了

如何解决尝试正确设置 2 个 csv 文件匹配的查询卡住了

以下是每个 csv 上的数据外观示例。

inventory.csv

ID,payment,Receipt#                                 
90006,VISA,jk73kl_                          
90006,null                             

inventory.csv

INFO,VIEWS,DATE
9006_Produce_Banana_jk73kl__,10-13-20
9006_Produce_Banana,10-13-20 

我的位置有问题，我需要搜索两个表格，如果有匹配的收据编号，将它们拉出并合并两行。

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


namespace ConsoleApp1
{
    class Program
    {
        static void Main()
        {
            string[] ourDataSheet = System.IO.File.ReadAllLines(@"../../OurData.csv");
            string[] theirDataSheet = System.IO.File.ReadAllLines(@"../../TheirData.csv");
            string ourDataHeaders = ourDataSheet[0];
            string theirDataHeaders = theirDataSheet[0];
            

            IEnumerable<string> TrackingQuery =
                from ourData in ourDataSheet
                let ourdatafields = ourData.Split(',')
                from theirData in theirDataSheet
                let theirdatafields = theirData.Split(',')
                where theirdatafields[0].EndsWith(ourdatafields[2])
                select ourdatafields[0] + "," + ourdatafields[1] + "," + ourdatafields[2] + "," + theirdatafields[0] + "," + theirdatafields[1] + "," + theirdatafields[2] + "," + theirdatafields[3];

            OutPutResults(TrackingQuery);

            Console.ReadKey();
        }

        static void OutPutResults(IEnumerable<string> query)
        {
            foreach(string item in query)
            {
               Console.WriteLine(item);
               Console.Read();
               
            }
        }
    }
}

解决方法

首先，我建议您使用像 CsvHelper 这样的第三方软件包并执行以下操作

public class Sale
{
    public int ID { get; set; }
    public string Payment { get; set; }
    [Name("Recipt#")]
    public string Recipt { get; set; }
}

public class Inventory
{
    public string INFO { get; set; }
    public string VIEWS { get; set; }
    public string DATE { get; set; }
}

IEnumerable<Sale> sales;
IEnumerable<Inventory> inventory;

using (var reader = new StreamReader(@"../../OurData.csv"))
using (var csv = new CsvReader(reader,CultureInfo.InvariantCulture))
{
    sales = csv.GetRecords<Sale>();
}

using (var reader = new StreamReader(@"../../TheirData.csv"))
using (var csv = new CsvReader(reader,CultureInfo.InvariantCulture))
{
    inventory = csv.GetRecords<Inventory>();
}

var results = sales.Where(s => inventory.Any(i => i.INFO.EndsWith(s.Recipt)));