Question

I’m not sure how to do this, and can use some advice.

I created a custom button on a standard page layout, and when the user clicks it, I want to check if the user has contacts in this object.

If he doesn’t, I want to display an alert- “please add contacts” and and return him to his current STANDARD page. Otherwise, I want him to get to a new VF page that is already written.
I’m not sure how to do this…

HALP!

Code:

<apex:page standardController="MY_List__c" extensions="MYListExtension" >
<apex:form >

           <script>
                var hasContact = {!totalContacts};
                if(hasContact == 0 ){
                    alert('Please add contacts!'); 
                    window.location ="/" + {"!theListId"};                    
                       }
                     else{
                          window.location = "/MYListSend?id=" + {"!theListId"};
                }

            </script>

            </apex:form>
</apex:page>

Answer 1

Try this out:

The apex class:

public Boolean checkContact { get; set; }
public Boolean hasContact   { get; set; }

public PageReference myMethod(){
    // your logic here
    hasContact = true;
    checkContact = true;

    return null;
}

And the visualforce page:

<apex:commandButton value="Check user data" action="{!myMethod}" reRender="checkArea"/>

<apex:outputPanel id="checkArea">
    <apex:outputPanel id="showAfterCheck" rendered="{!checkContact}">
            <script>
                var hasContact = {!hasContact};
                if(!hasContact){
                    alert('Please add contacts!');
                    window.location = "/apex/YourCustomPageName1";
                }
                else{
                    window.location = "/apex/YourCustomPageName2";
                }

            </script>
    </apex:outputPanel>
</apex:outputPanel>