“The data reader has more than one field” error in Entity Framework

Question

I\'m executing this simple query with Entity Framework

db.Database.SqlQuery(\"SELECT * FROM hospital\");

But I got this error

Answer 1

You might also get this error if you are trying to execute an INSERT, UPATE or DELETE command

Instead of using SqlQuery use ExecuteSqlCommand

using (var ctx = new SchoolDBEntities())
{
    int noOfRowUpdated = ctx.Database.ExecuteSqlCommand("Update student 
            set studentname ='changed student by command' where studentid=1");

    int noOfRowInserted = ctx.Database.ExecuteSqlCommand("insert into student(studentname) 
            values('New Student')");

    int noOfRowDeleted = ctx.Database.ExecuteSqlCommand("delete from student 
            where studentid=1");
}

For more details visit - http://www.entityframeworktutorial.net/EntityFramework4.3/raw-sql-query-in-entity-framework.aspx