Use the GetOrdinal() method of a DataReader object to get the numeric positions of a column

using System;
using System.Data;
using System.Data.SqlClient;

class UsingColumnOrdinals
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");

    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();

    mySqlCommand.CommandText = "SELECT TOP 5 ID, FirstName, LastName FROM employee " +
      "ORDER BY ID";

    mySqlConnection.Open();

    SqlDataReader productsSqlDataReader = mySqlCommand.ExecuteReader();

    int idPos = productsSqlDataReader.GetOrdinal("ID");
    int firstNamePos = productsSqlDataReader.GetOrdinal("LastName");
    int lastNamePos = productsSqlDataReader.GetOrdinal("FirstName");

    while (productsSqlDataReader.Read())
    {
      Console.WriteLine("ID = " + productsSqlDataReader[idPos]);
      Console.WriteLine("FirstName = " + productsSqlDataReader[firstNamePos]);
      Console.WriteLine("LastName = " + productsSqlDataReader[lastNamePos]);
    }

    productsSqlDataReader.Close();
    mySqlConnection.Close();
  }
}

Related examples in the same category

1.	How to use the ExecuteScalar() method to run a SELECT statement that returns a single value
2.	Use the ExecuteNonQuery() method to run INSERT, UPDATE, and DELETE statements
3.	Use SqlCommand to call SQL and insert data to database table
4.	Delete data from database using SqlCommand
5.	Get row count from SqlCommand
6.	Pass parameters to SqlCommand
7.	Get row count by 'ExecuteScalar'
8.	Execute multiple SQL statements(insert) using a SqlCommand object
9.	execute multiple SELECT statements(select) using a SqlCommand object and read the results using a SqlDataReader object
10.	Async Command Object
11.	Populate a DataSet object using a SELECT statement
12.	Use ExecuteXmlReader() to run a SELECT statement that returns XML
13.	control SqlCommand to return a single row

Use the GetOrdinal() method of a DataReader object to get the numeric positions of a column : SqlCommand « Database ADO.net « C# / C Sharp

Related examples in the same category