C# MVC 获取 .不同() 数据

本文关键字：数据 不同 MVC 获取 | 更新日期: 2023-09-27 18:35:43

我在SQL Server中有一些数据：

[
  {
    "code": 1,
    "name": "qweee",
    "IDNO": "ff2222"
  },
  {
    "code": 2,
    "name": "test2",
    "IDNO": "ff2222211"
  },
  {
    "code": 3,
    "name": "fsdfasdf",
    "IDNO": "ddaaa"
  },
  {
    "code": 4,
    "name": "qweee",
    "IDNO": "ff2222"
  },
  {
    "code": 5,
    "name": "123",
    "IDNO": "U120000005"
  }
]

我需要在 C# MVC 中使用以下 SQL

SELECT DISTINCT  
    A1.IDNO , A1.name ,
    (SELECT COUNT(cnt_tab.IDNO) 
     FROM Postpartum_AccountsManagement AS cnt_tab
     WHERE cnt_tab.IDNO = A1.IDNO) AS data_cnt
FROM 
    Postpartum_AccountsManagement AS A1

然后我会得到 

[
      {
        "name": "test2",
        "IDNO": "ff2222211",
        "data_cnt": 1
      },
      {
        "name": "qweee",
        "IDNO": "ff2222",
        "data_cnt": 2
      },
      {
        "name": "fsdfasdf",
        "IDNO": "ddaaa",
        "data_cnt": 1
      },
      {
        "name": "123",
        "IDNO": "U120000005",
        "data_cnt": 1
      }
]

我需要在 C# MVC 中获取相同的数据。

C# MVC 获取 .不同() 数据

请检查

以下代码

使用 NewtonSoft 将 json 字符串转换为序列化对象并使用 Linq 查询。

 IList<AccountsManagement> yourData = JsonConvert.DeserializeObject<List<AccountsManagement>>(yourJsonString);
 IList<YourResult> finalResult =  yourData.GroupBy(m => new {m.Name, m.IDNO).Select(group => new YourResult(){
       Name = group.FirstOrDefault().Name,
       IDNO = group.FirstOrDefault().IDNO,
       Data_cnt = group.Count()
    }).ToList();

您的课程将是 

public class AccountsManagement
{
  public int Code {get;set;}
  public string Name {get;set;}
  public string IDNO {get;set;}
}
public class YourResult
{
   public string Name {get;set;}
   public string IDNO {get;set;}
   public int Data_cnt {get;set;}
}
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