I would like to bind the value returned from a SQL Query to a Text Box:

 protected void
cmbPujaName_SelectedIndexChanged(object sender, EventArgs e)
    {
        string pujaselectedid = null;
        pujaselectedid = cmbPujaName.DataValueField;
        SqlConnection con2 = null;
        con2 = new SqlConnection(ConfigurationManager.ConnectionStrings["SRKBSDB"].ConnectionString);
        SqlDataAdapter pamt = new SqlDataAdapter("select Amount from PoojaDietyMaster where
PoojaDietyMasterID =" + cmbPujaName.DataValueField, con2);
        DataSet pamtds= new DataSet();
       
pamt.Fill(pamtds);
       
//cmbPujaName.DataSource = pamtds;
        txtAmount.Text= pamtds -- Not sure what to add here
       
txtAmount.DataBind();
    }

Please help