Question

我正在使用带有实体框架5的asp.net mvc 3.我有我的.edmx文件＆amp;能够使用linq或SP与我的数据库进行交互，但我想运行一些原始的sql语句。我正在尝试这样的事情：

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

是否有可能以这种方式执行sql查询？感谢。

Answer 1

您可以执行以下类型的查询：

返回特定类型实体的实体类型的SQL查询。

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>();
  }

返回基本数据类型的非实体类型的SQL查询。

      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");

       }

数据库的原始SQL命令。

       onNext: function (tab, navigation, index) {
        if(index == 1) {
            if(form_header.valid() === true) {

                    $('#report_header_fm').submit(function(){
                    console.log('test123');
                    $.ajax({
                        type: "POST",
                        url: baseURL + "index.php/addNewReport",
                        data: $("#report_header_fm").serialize(),
                        success: function(data)
                        {
                            console.log('test');
                        }

                        });  //Ajax end
                });

                }
            else
            {
                 return false;
            }
            }
            handleTitle(tab, navigation, index);

            },

您也可以参考this

Answer 2

这已经奏效!!

using (var ctx = new HR())
        {

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

            ctx.SaveChanges();
        }

如何在实体框架中执行原始sql查询？

2 个答案: