Display GridView Row delete confirmation using Bootstrap Modal Popup in ASP.Net

Hello everyone, I would like to add a confirmation modal after the click of delete in gridview. The problem is that with this addition the delete takes place only for the first row of the gridview even if I try to delete another row. I have the code below inside a gridview itemtemplate 

Is there a way to pass to bootstrap modal the right parameters that will be relevant to the clicked row? Thank you in advance..

<asp:LinkButton ID="diagrafi" runat="server" type="button" class="btn btn-primary btn-lg" data-toggle="modal"  data-target="#delete_Modal">
   <asp:Image ID="Image1" Width="20px" runat="server" ImageUrl="images/del.png"/>
</asp:LinkButton>
<div class="modal fade" id="delete_Modal" tabindex="-2" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
     <div class="modal-dialog">
            <div class="modal-content">
                    <div class="modal-header">
                         <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                <span aria-hidden="true">&times;</span></button>
                                       <h4 class="modal-title">
                                               delete command
                                       </h4>
                      </div>
              <div class="modal-body">
              <p>
                 are you sure?</p>
               </div>
               <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal" onclick="myFunction()">                                 cancel</button>
     <asp:Button ID="epivevaiosi" CommandArgument='<%#Eval("kodikos")+"|"+Eval("tablename")%> '
          CommandName="DeleteRow" runat="server" type="button" Text="delete" class="btn btn-primary"/>
               </div>
        </div>
    </div>
 </div>