Question

I have a function which would populate a datatable with the contents of a table. But its showing an annoying invalid column name error with the value I give in the WHERE clause.

public static DataTable GetRequests(string empid)
{
   DataTable dt = new DataTable();
   string strConnection = ConfigurationManager.AppSettings["connStr"];
   using (SqlConnection connection = new SqlConnection(strConnection))
   {
      connection.Open();
      SqlCommand sqlcmd = new SqlCommand();
      SqlDataAdapter sAdap = new SqlDataAdapter();                
      sqlcmd.Connection = connection;
      sqlcmd.CommandType = System.Data.CommandType.Text;
      sqlcmd.CommandText = "Select * from requests Where emp_id=P001";                
      sAdap.SelectCommand = sqlcmd;
      sAdap.Fill(dt);
   }
   return dt;            
}

Now with this i am getting the error at

sAdap.fill

and the error is

invalid column name P001

I’m stumped at this. Any ideas why I’m facing this issue?

Answer 1

If it’s a string constant, surround it with single quotes. ‘P001’ or better still, paramaratise it.