如何在實體框架中執行原始sql查詢？

我正在使用實體框架5的asp.net mvc 3.我的.edmx文件&能夠使用linq或SP與我的數據庫交互，但我想運行一些原始的sql語句。我正在嘗試這樣的事情：如何在實體框架中執行原始sql查詢？

Using(var ctx=new HREntities()) 
{ 
    ctx.Database.ExecuteSqlCommand("insert into Employees values {0}, {1}", model.EMPLOYEEID, model.EMPLOYEENAME); 
    ctx.SaveChanges(); 
}

是否有可能以這種方式執行sql查詢？謝謝。

來源

2013-05-30 Badhon Jain

http://stackoverflow.com/questions/915329/is-it-possible-to-run-native-sql-with-entity-framework – Satpal

你也可以看看我的答案http://stackoverflow.com/questions/16807334/execute-raw-sql-query-in-asp-net-mvc-database-first-mode/29147592#29147592 [1]：http://stackoverflow.com/questions/16807334/execute-raw-sql-query-in-asp-net-mvc-database-first-mode/29147592#29147592 –

您可以執行查詢的以下幾種類型：

的實體類型的SQL查詢返回特定類型的實體。

using (var ctx = new SchoolDBEntities()) 
{ 

    var studentList = ctx.Students.SqlQuery("Select * from Student").ToList<Student>(); 

}

針對返回原始數據類型的非實體類型的SQL查詢。

using (var ctx = new SchoolDBEntities()) 
{ 

var studentName = ctx.Students.SqlQuery("Select studentid, studentname 
    from Student where studentname='New Student1'").ToList(); 
} 


//Error 
using (var ctx = new SchoolDBEntities()) 
{     
    //this will throw an exception 
    var studentName = ctx.Students.SqlQuery("Select studentid as id, studentname as name 
     from Student where studentname='New Student1'").ToList(); 
} 

//SQL query for non-entity types: 
    using (var ctx = new SchoolDBEntities()) 
    { 
     //Get student name of string type 
     string studentName = ctx.Database.SqlQuery<string>("Select studentname 
    from Student where studentid=1").FirstOrDefault<string>(); 
    }

原始SQL命令到數據庫。

 using (var ctx = new SchoolDBEntities()) 
     { 

      //Update command 
      int noOfRowUpdated = ctx.Database.ExecuteSqlCommand("Update student 
     set studentname ='changed student by command' where studentid=1"); 
      //Insert command 
     int noOfRowInserted = ctx.Database.ExecuteSqlCommand("insert into student(studentname) 
     values('New Student')"); 
     //Delete command 
     int noOfRowDeleted = ctx.Database.ExecuteSqlCommand("delete from student 
     where studentid=1"); 

     }

您也可以參考this

來源

2015-07-03 05:36:22

這已經奏效了！

using (var ctx = new HR()) 
     { 

      ctx.Database.ExecuteSqlCommand("insert into Employees values (9, 'Beverage')"); 

      ctx.SaveChanges(); 
     }

來源

2013-06-03 09:15:41

如何在實體框架中執行原始sql查詢？

回答

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