Trigger on Notes and Attachments

If we need to write a trigger on ay object in salesforce , salesforce itself gives as a cool UI to create the same? Ever you tried to do the same for Notes and Attachments in salesforce ? No... Nowhere can see such a UI. Amazing ! We need to create trigger under the Notes and attachments. Then there is a solution... Read through...

Method 1 : Create trigger from Developer console.

Click New > Apex Trigger
Select SObject as "Attachment" form dropdown available.

Method 2 : Using Force.com IDE or ANT.

Sample code :

trigger SetTitleToAttachment on Attachment (after insert) {
String Title;

Id pId;
for(Attachment att: Trigger.new){
Title=att.Name;
pId=att.ParentId;
}
List<Case> c=[select Id , Title__c from Case where Id=:pId];

List<Case> caseRecordToUpdate = new List<Case>();

if(c != Null){

for(integer i=0 ; i<c.size(); i++){
c[i].Title__c=Title;

caseRecordToUpdate.add(c[i]);

}

}

if( caseRecordToUpdate.size() > 0 ){
update caseRecordToUpdate;

}

}