Question

我正在从db（sqlite）中检索日期列值。

public Contacts ReadDaysLeft(int daysid)            
{               
    using (var dbConn = new SQLiteConnection(App.DB_Path))               
    {                  
      var data = dbConn.Query<DaysLeft>("select  * from DaysLeft where Id = " + daysid).FirstOrDefault();

      DateTime dt =  Convert.ToDateTime(data.Date);      
      return data;                
    }      
}

我可以通过sql查询获取日期值 DateTime dt = Convert.ToDateTime（data.Date）;

但我的问题是，如何将该日期值发送给我的调用函数..请帮忙

Answer 1

呼叫者：

DateTime dt;
var result = ReadDaysLeft(123, out dt);
Console.WriteLine(dt); //Is that what you need?

Calee：

public Contacts ReadDaysLeft(int daysid, out DateTime dt)            
{               
    using (var dbConn = new SQLiteConnection(App.DB_Path))               
    {                  
      var data = dbConn.Query<DaysLeft>("select  * from DaysLeft where Id = " + daysid).FirstOrDefault();

      dt =  Convert.ToDateTime(data.Date);      
      return data;                
    }      
}

有关详细信息，请参阅：out (C# Reference)

如何从sqlite sql查询中检索日期并发送到调用函数

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