I am having trouble getting the Id from the selected record to pass to my controller. When I check my debug the value of "accId" reports back as NULL.

Here is my VF Page (code trimmed):

<apex:page controller="controller_AccountServicing" sidebar="false">

    <apex:form id="theForm">
        <div id="header">
            <b>Account Servicing Activities (This Week)</b>

        <div id="section" >
            <apex:pageBlock id="thePage">

                <apex:pageBlockTable value="{!Activities}" var="acc" id="Detail" >

                    <apex:column style="align:center;text-align:center;">
                        <apex:facet name="header">Activity Name</apex:facet>
                        <apex:outputlink target="_blank" value="/{!acc.Id}">{!acc.Name}</apex:outputlink>

                <apex:column >
                    <apex:commandButton value="Update" action="{!updateWindow}">
                        <apex:param name="activityId" assignTo="{!accid}" value="{!Acc.Id}"/>




Here is my controller (code trimmed):

public class controller_AccountServicing {
    //Create Variables
    list    <Account_Servicing_Activity__c> accActivities   = new list<Account_Servicing_Activity__c>();
    public  boolean renderPrompt    {get;set;}
    public  Id      accId           {get;set;}

    public controller_AccountServicing(){
        //Initilization items
        Id currentuser = system.UserInfo.getUserId();


    public List<Account_Servicing_Activity__c> getActivities() {
            accActivities = [Select Id,Name,(OTHER FIELDS)
                            FROM Account_Servicing_Activity__c

            return accActivities;   

    public void updateWindow() {
        renderPrompt = TRUE;
        system.debug('Activity ID = ' + accId);

    public void updateRecord() { 

        try {
            renderprompt = false;
        } catch(DmlException e) {
            System.debug('The following exception has occurred: ' + e.getMessage());




1 Answer 1


apex:param is not supported on apex:commandButton. Either use a normal button and call an apex:actionFunction, or use an apex:commandLink.

The only elements that are supported with apex:param are as follows:


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .