question

Actually java script is for single selection, without it, there are multiple selection.

Ok, this is confusing?

A single RadioButton does not have, nor allow multiple selections. It has ONE value. Either you select it, or you don't?

You can for each repeater row shove in any "text" value for the RadioButton, but that does NOT result in a multiple selection radio button. You might want to post a screen shot of what that radio button looks like.

but, if you want multiple choices for the one RadioButtonList?

Then you need to fill out the list of choices (very much like a combo box, or listbox). Then you have a list of selections, and selecting one will result in a value for the selection.

Say you have this simple markup:

And the button code to fill this out, could be this:

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    
         rbRating.DataSource = MyRst("SELECT ID,Rating FROM tblRating ORDER BY ID")
         rbRating.DataBind()
    
     End Sub
    
     Function MyRst(strSQL As String) As DataTable
    
         Dim rstData As New DataTable
         Using conn As New SqlConnection(My.Settings.TEST4)
             Using cmdSQL As New SqlCommand(strSQL, conn)
                 conn.Open()
                 rstData.Load(cmdSQL.ExecuteReader)
             End Using
         End Using
    
         Return rstData
    
     End Function

And now we have this:

So, in above case, if I select a value, then the button will take on the "ID" from the data table.

But, lets move the above INSIDE of a repeater.

So, we have say a few hotels, and the above will allow us to rate the Hotel.

Note that we have to do TWO things:

Fill the RB list with the data of choices.
THEN set the current selection to the current data row in the repeater.

You can certainly use a RadioButton list, and drive it from the database.

So, say this markup:

And code to fill?

We have both the data source for the database RB list choices, and then on repeater bind, we ALSO set the current choice.

So, our code looks like this:

     Dim rstRating As New DataTable
     Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    
         If Not IsPostBack Then
             LoadData()
         End If
    
     End Sub
    
    
     Sub LoadData()
    
         rstRating = MyRst("SELECT ID, Rating FROM tblRating ORDER BY ID")
         Repeater1.DataSource = MyRst("SELECT * from tblHotelsA ORDER BY HotelName")
         Repeater1.DataBind()
    
     End Sub
    
     Protected Sub Repeater1_ItemDataBound(sender As Object, e As RepeaterItemEventArgs) Handles Repeater1.ItemDataBound
    
         If e.Item.ItemType = ListItemType.Item Or
             e.Item.ItemType = ListItemType.AlternatingItem Then
    
             Dim OneRow As DataRow = e.Item.DataItem.Row    ' get current bind data row 
             Dim rbList As RadioButtonList = e.Item.FindControl("rbRating")
             rbList.DataSource = rstRating
             rbList.DataBind()
             rbList.SelectedValue = OneRow("Rating")    ' SET EACH repeater row select value
         End If
    
     End Sub
    
     Function MyRst(strSQL As String) As DataTable
    
         Dim rstData As New DataTable
         Using conn As New SqlConnection(My.Settings.TEST4)
             Using cmdSQL As New SqlCommand(strSQL, conn)
                 conn.Open()
                 rstData.Load(cmdSQL.ExecuteReader)
             End Using
         End Using
    
         Return rstData
    
     End Function

and now we have this output:

Now, I have two example buttons, one in the repeater, and one outside.

I can show the selected RB value in the repeat with a simple button click event

(the button in the repeater).

so we do this:

And now code behind for that one button in the repeater looks like this:

That code will look like this:

     Protected Sub cmdRowSel_Click(sender As Object, e As EventArgs)
    
         Dim btn As Button = sender
         Dim MyRow As RepeaterItem = btn.NamingContainer
    
         Dim rbChoice As RadioButtonList = MyRow.FindControl("rbRating")
    
         Debug.Print("rb choice (value) = " & rbChoice.SelectedItem.Value)
         Debug.Print("rb choice (Text) = " & rbChoice.SelectedItem.Text)
    
    
     End Sub
    
 So, output looks like:

 rb choice (value) = 3
 rb choice (Text) = Good

Or, I could have a button outside of the repeater (like you have) and show/process all values of the repeater.

That will look like this (the button outside of repeater).

     Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    
         For Each MyRow As RepeaterItem In Repeater1.Items
    
             Dim rbChoice As RadioButtonList = MyRow.FindControl("rbRating")
    
             Debug.Write("rb choice (value) = " & rbChoice.SelectedItem.Value)
             Debug.Print("---> rb choice (Text) = " & rbChoice.SelectedItem.Text)
    
         Next
    
     End Sub

Output:

So, it is not at all clear what that JavaScript event code you have is doing, but as noted, if you have multiple selections in the RB item, then quite sure you need to use a radio button list. They are nice, since they automatic only allow one choice - and you don't need any code for the single selecton from the "many" choices of the RB.

Regards,
Albert D. Kallal (Access MVP 2003-2017)
Edmonton, Alberta Canada