如何在JSP循环中为按钮提供唯一的ID

Question

I would like to give each button in the loop a unique ID to associate the button id to that particular row.

Any help in this matter would be highly appreciated!

while(resultSet.next()){
%>
    <tr bgcolor="#DEB887">

        <td><%=resultSet.getString("productid") %></td>
        <td><%=resultSet.getString("productname") %></td>
        <td><%=resultSet.getInt("price") %></td>
        <td><%=resultSet.getString("quantity") %></td>
        <td><%=resultSet.getString("totalprice") %></td>
        <td><button id=  type="button" onclick="addToCart()">Add to Cart</button></td>
    </tr>

    <% 

Answer 1

You are doing your own looping... You could use an int variable and use it to increment for each iteration ... see the example below;

<%
int idCounter=1;
while(resultSet.next()){
%>
    <tr bgcolor="#DEB887">

        <td><%=resultSet.getString("productid") %></td>
        <td><%=resultSet.getString("productname") %></td>
        <td><%=resultSet.getInt("price") %></td>
        <td><%=resultSet.getString("quantity") %></td>
        <td><%=resultSet.getString("totalprice") %></td>
        <td><button id="addToCartButtonId<%=idCounter%>"  type="button" onclick="addToCart()">Add to Cart</button></td>
    </tr>

    <% 
       idCounter++;
%>

For each row, the button will have a unique id. Hope this helps ...

Thanks.