error 'there is already an open datareader associated with this command which must be closed first'

Question

runtime error \'there is already an open datareader associated with this command which must be closed first\'

objCommand = new SqlCommand(\"SELECT field1, fi         


        

Answer 1

Best Solution: There is only problem with your "CommandText" value. Let it be SP or normal Sql Query.

• Check 1: The parameter value which you are passing in your Sql Query is not changing and going same again and again in your ExecuteReader.

• Check 2: Sql Query string is wrongly formed.

• Check 3: Please create simplest code as follows.

  string ID = "C8CA7EE2";
  string myQuery = "select * from ContactBase where contactid=" + "'" + ID + "'";
  string connectionString = ConfigurationManager.ConnectionStrings["CRM_SQL_CONN_UAT"].ToString(); 
  SqlConnection con = new SqlConnection(connectionString);
  con.Open();
  SqlCommand cmd = new SqlCommand(myQuery, con);
  DataTable dt = new DataTable();
  dt.Load(cmd.ExecuteReader());
  con.Close();