I am running into problem when trying to implement checkboxes using Struts
html:checkbox tag in <logic:iterate> tag. The scenario is as follows:
I have a result page that is populated from the database. I used the
<logic:iterator> to iterate through the list of results retrieved from
database matching a search criteria. However, when display the results in a
table in JSP, I want the ability to do a multiple delete by using checkboxes
to check those records that needed to be deleted. I setup a DeleteForm with
"deleteList" attribute of type String[].
DeleteForm:
public class DeleteForm extends ActionForm {
private String[] deleteList = {};
public String[] getDeleteList() {
return deleteList;
}
/**
* @param strings
*/
public void setDeleteList(String[] strings) {
deleteList = strings;
}
.. so on..
}
In my SearchAction class, i get the results from database and put them in a
list and the list in the request object and display the results page.
SearchAction class:
memberList = registration.searchRegistration(inputType, inputText);
request.setAttribute("searchResults", memberList);
In my DeleteAction class which is executed when I submit the Delete action
after checking the records that I want to delete I retrieve the list:
DeleteAction class:
DeleteForm deleteForm = (DeleteForm)form;
String[] deletes = deleteForm.getDeleteList();
In my JSP, I used the "indexed" attribute as follows hoping to identify the
row where the checkbox is checked, but could not retrieve those values in my
Action class. The problem is I get NullPointerException on the line
String[] deletes = deleteForm.getDeleteList();
in my DeleteAction class sayign DeleteForm is null. I don't understand as I
have them in my config file as request scope. I am not sure if this is
right. How can retrieve the values from check boxes.
Please help.
Below is my JSP code:
<logic:iterate id="register" name="searchResults"
type="org.acaosa.registration.RegistrationTO">
<tr>
<td width="5%"><html:checkbox name="deleteForm"
property="deleteList" value="true" indexed="true"></html:checkbox></td>
<td width="20%"><bean:write name="register" property="firstName"
/></td>
<td width="20%"><bean:write name="register" property="lastName"
/></td>
<td width="20%" align="center"><bean:write name="register"
property="phone" /></td>
<td width="25%"><bean:write name="register" property="email" /></td>
<td width="10%" align="center"><bean:write name="register"
property="region" /></td>
</tr>
</logic:iterate>
Any suggestions will be appreciated.
Thanks
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