hi guys,

I try to write a simple data binding function.
I create a RadioButtonList and i connect to the database and bind the Radio with the DataTable that I got from DataSet.

and I create a print button and i want to fill the lblDisplay with the selected value from the radio. somehow, the selectedIndex from the radio is -1.
Can somebody help me plz...here is the code.

    private void Page_Load(object sender, System.EventArgs e){
     // Put user code to initialize the page here
      string conn = "Persist Security Info=false;database=my_data;uid=my_user;pwd=my_pas s;host=localhost";
      string cmd = "Select * From Visitors";

      MySqlDataAdapter adapter = new MySqlDataAdapter(cmd,conn);
      DataSet data = new DataSet();
      adapter.Fill(data,"Visitors");

      DataTable Visitors = data.Tables["Visitors"];
      rbVisitor.DataSource = Visitors; //i called my radiolist with rbVisitor

      rbVisitor.DataValueField = "vistID";
      rbVisitor.DataTextField = "vistName";
      rbVisitor.DataBind();

      if (!IsPostBack){
        rbVisitor.SelectedIndex = 0;
      }
    }

    private void btnPrint_Click(object sender, System.EventArgs e)
    {
      lblDisplay.Text = rbVisitor.SelectedItem.Text.ToString(); //this part give no value, It print out OK though on the screen
    }

thanks