Datalist checkbox Ajax click

Private Sub DataList1_ItemDataBound(sender As Object, e As System.Web.UI.WebControls.DataListItemEventArgs) Handles DataList1.ItemDataBound

    ......
          Dim Attr As CheckBoxList = _
         CType(e.Item.FindControl("Attributes"), CheckBoxList)

        Dim adapter1 As SqlDataAdapter = New SqlDataAdapter(features, sqlConn)
        adapter1.Fill(ds, "Attributes")
        Attr.DataSource = ds.Tables(0)
        Attr.DataTextField = "Name"
        Attr.DataValueField = "SpecificationAttributeId"
        Attr.DataBind()

     

    End Sub

I have the above, code, how to I add dynamic event for checkbox list and if clicked get the value and manipulate the query,

This can click should be in Ajax functionality