For Loop Issue in C#

[Mary21student]

Database

john smith 9234839
ken williams 3293432
mary davis 9234323

jan will 5832934

kc bing 3892343

//////////////////////////////

This is a multiline Text Box wanting to input more then one item at a time

input Box 9234839,
3293432 ,

5832934,

3892343

Button
//////////////////////////////////

private void submitbutton_Click(object sender, EventArgs e)
{

string connString = ConfigurationManager.ConnectionStrings["data"].ConnectionString;
using (SqlConnection con = new SqlConnection(connString))


{
for (int i = 1; i <= "Contact.Text.Count(); i++)
{
if (1 < i)
{

con.Open();

SqlCommand cmd = new SqlCommand("NameAddress", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;


cmd.Parameters.AddWithValue("@NameAddress", SqlDbType.VarChar).Value = Contact.Text.Trim();


SqlDataReader dr = cmd.ExecuteReader();
--------------------- dr.Read(); //'Invalid attempt to read when no data is present.'

textBox1.Text = dr[1].ToString() + " " + dr[2].ToString() + " " + dr[3].ToString() + " " + i.ToString();

con.Close();
}

what I want it to do is print out like this below, but I am getting this 'Invalid attempt to read when no data is present.'. I am just not sure what I am doing wrong?

john smith 9234839 1
ken williams 3293432 2
mary davis 9234323 3

jan will 5832934 4

kc bing 3892343 5

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