Hi all,

I am trying to create a trigger that will insert and/or update a PricebookEntry when the Product is inserted or updated. I have limited Apex knowledge and have put together the part that inserts the Pricebook Entry on Insert of the Product and that seems to be working correctly, however I cannot seem to get the update side of things working. 

Here is my code so far:

trigger UpsertPBE on Product2 (after insert, after update) {

sObject s = [select ID from Pricebook2 where IsStandard = TRUE];

list<PricebookEntry> entries=new list<PricebookEntry>();

if(trigger.isinsert){
for (Product2 p : Trigger.new) {
entries.add(
new PricebookEntry(
Pricebook2Id=s.ID,
Product2Id=p.ID,
UnitPrice=p.Item_Cost__c,
IsActive=p.IsActive,
UseStandardPrice=FALSE)
);
}
insert entries;
}

list<PricebookEntry> pbe = [SELECT Id FROM PricebookEntry WHERE Product2ID =:trigger.new[0].id];

if(trigger.isupdate){
for (Product2 p : Trigger.new) {
if (pbe != null) {
PricebookEntry.UnitPrice=p.Item_Cost__c;
}
}
}
}

The error message I am getting is : 

Error: Compile Error: Expression cannot be assigned at line -1 column -1

I'm hoping someone has come accross this before and has some idea on how I can make it work.

Any advice would be greatly appreciated!

Thank you!!