Create Data Dictionary to read column from DB - asp.net

Question

I am creating a WinForm Application that reads all the records from a certain column in a textfile. What I now need is a Data Dictionary that I can use to read records from the Database once the applications runs and prior to reading the TextFile. I need to read a specific column from the database and match it with the textfile. I am not sure how to go about creating a data dictionary. This is what I have so far.
This is to read the textfile, which is working fine.
using (StreamReader file = new StreamReader("C:\\Test1.txt"))
{
string nw = file.ReadLine();
textBox1.Text += nw + "\r\n";
while (!file.EndOfStream)
{
string text = file.ReadLine();
textBox1.Text += text + "\r\n";
string[] split_words = text.Split('|');
int dob = int.Parse(split_words[3]);
This is what I have so far to create the Data Dictionary.
public static Dictionary<int, string> dictionary = new Dictionary<int, string>();

Answer 1

You can use a SqlDataReader. Here is some code, you just need to modify it to suit your needs. I have added comments for you:
// declare the SqlDataReader, which is used in
// both the try block and the finally block
SqlDataReader rdr = null;
// Put your connection string here
SqlConnection conn = new SqlConnection(
"Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI");
// create a command object. Your query will go here
SqlCommand cmd = new SqlCommand(
"select * from Customers", conn);
try
{
// open the connection
conn.Open();
// 1. get an instance of the SqlDataReader
rdr = cmd.ExecuteReader();
while (rdr.Read())
{
string id = (int)rdr["SomeColumn"];
string name = (string)rdr["SomeOtherColumn"];
dictionary.Add(id, name);
}
}
finally
{
// 3. close the reader
if (rdr != null)
{
rdr.Close();
}
// close the connection
if (conn != null)
{
conn.Close();
}
}