Retrieve all rows from SQL Server and place into multiline textbox

Question

I want to retrieve all rows from SQL Server and to place it in a multi line textbox. The query executes but it loads the last row maybe because its the last record. Should I have a 'foreach' statement?

private void LoadComments()
{
   using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["db_TestDBConnectionString"].ConnectionString))
   {
      using (SqlCommand com = new SqlCommand("LoadNotes", con))
      {
         com.CommandType = CommandType.StoredProcedure;

         con.Open();

         com.ExecuteNonQuery();

         SqlDataReader dr = com.ExecuteReader();

         while (dr.Read() == true)
         {
            TextBox1.Text = dr.GetValue(0).ToString() + " " + dr.GetValue(1).ToString() + dr.GetValue(2).ToString();
         }
      }
   }
}

Answer 1

Before While loop set TextBox1.Text=""; then try this code.

TextBox1.Text += dr.GetValue(0).ToString() + " " + dr.GetValue(1).ToString() + 
dr.GetValue(2).ToString()+Enviroment.NewLine;

In your Code your assingning each row to TextBox1 but you to concate the next row to TextBox1 so i put + before equal so it concate all rows.

Answer 2

string str = "";

while (dr.Read() == true)
         {
           str+= dr.GetValue(0).ToString() + " " + dr.GetValue(1).ToString() + dr.GetValue(2).ToString();
         }

 TextBox1.Text = str;