I want to validate radiobuttonlist based on Item.

Question

I have one datalist inside there is one radiobuttonlist and  item binding from database. in radiobuttonlist there are three Item binded Approved,N/A and Rejected.

for image please go to this link...   http://stackoverflow.com/questions/35313639/how-can-we-validate-radiobuttonlist-inside-datalist-based-on-item 

so what  do i want when user click on Update button and if they are going to approve then all fileds(suppose there are 10 record binding) should be mandatory to checked. 

I want to validate all Approve Item on Button click not N/A or Reject.Please suggest me how can i achive this task. ..Here is some code that i have written it's working fine but also asking for Reject button when i  click on second record and leaving first as null.

int sum = 0;

foreach (DataListItem item in dtLstRejection.Items)

{

RadioButtonList rdlReasoncodeType ((RadioButtonList)item.FindControl("rdlReasonType"));

System.Web.UI.WebControls.Label lbldlmsg = (Label)item.FindControl("lbldlmsg");

{

if (rdlReasoncodeType.SelectedIndex == 0|| rdlReasoncodeType1.SelectedIndex== -1)

{

if (rdlReasoncodeType1.SelectedItem == null)

{

if (sum == 0)

{

lbldlmsg.Text = "*Approve fields are mandatory to check";

return; }}}}

else

{

sum++;

lbldlmsg.Text = "";

}

lbldlmsg.Text = "";

}}