我有这个简单的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.Entity;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
NuLabsEntities db = new NuLabsEntities();
IEnumerable<company> companies = from cmp in db.company select cmp;
foreach (var row in companies)
{
Console.WriteLine(companies);
Console.ReadLine();
}
}
}
}
我知道这是一个基本问题：我正在学习C＃
但是我不明白为什么，用ado.net创建一个edmx文件并尝试运行此简单代码后，它向我返回以下查询，而不是company表的行列表的结果：
SELECT
[Extent1].[companyId] AS [companyId],
[Extent1].[labirintoCodiceCliente] AS [labirintoCodiceCliente],
[Extent1].[labirintoCodiceAteco2007] AS [labirintoCodiceAteco2007],
[Extent1].[name] AS [name],
[Extent1].[doc] AS [doc],
[Extent1].[notes] AS [notes],
[Extent1].[vatNumber] AS [vatNumber],
[Extent1].[taxCode] AS [taxCode],
[Extent1].[LabirintoFornitoreId] AS [LabirintoFornitoreId],
[Extent1].[LabirintoCommercialistaId] AS [LabirintoCommercialistaId],
[Extent1].[LabirintoConsulenteDelLavoroId] AS [LabirintoConsulenteDelLavoroId]
FROM [dbo].[company] AS [Extent1]
Console.WriteLine(companies); 应该 Console.WriteLine(row.blah);
您需要调用.ToList()然后遍历集合。调用时评估查询ToList()。
有了foreach这些代码，您就可以将每一company行都放入行中。您可以访问的特性company从row。
假设您的comany的结构是这样
public class company
{
public int companyId {get;set;}
public string companyName {get;set;}
}
您的代码应为
foreach (var row in companies.ToList())
{
Console.WriteLine("CompanyId:"+row.CompanyId.ToString());
Console.WriteLine("CompanyName:"+row.CompanyName);
Console.ReadLine();
}
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我来说两句