Retrieves a schema table for a query : DataTable « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. DataTable

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

public class GetSchema
{
    public static void Main() 
    {
        string connectionString = "Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI";
        string SQL = "SELECT * FROM CUSTOMERS";

        SqlConnection con = new SqlConnection(connectionString);
        SqlCommand cmd = new SqlCommand(SQL, con);
        SqlDataReader r;
        DataTable schema;

        con.Open();
        r = cmd.ExecuteReader();
        schema = r.GetSchemaTable();
        con.Close();
        foreach (DataRow row in schema.Rows)
        {
            foreach (DataColumn col in schema.Columns)
            {
                Console.WriteLine(col.ColumnName + " = " + row[col]);
            }
        }
    }
}