1. Writing CSV files using APEX

2. I had a requirementto send a file with single record as a CSV attachment
public static void xxxx (List<String> CIDS)
{
try {
List<Case> Caselist= [Select <Fields> from Case where ID in :CIDS]; == Selectdesired fields from table
=== Form Header String =====
string header1 = 'Account Type,DUNS#,Complaint Incident Closed,Customer FirstName n';
string header = header1 ;
string finalstr = header ;
=====Form Data string concatenated with “,’
for(Case a: Caselist )
{
string recordString0 =a.Account_Type__c+','+a.Account_DUN_Number__c+','+a.Status+','+a.Contact_First_Nam
e__c'+'n';
string recordstring = recordString0 ;
finalstr = finalstr +recordString;
}
Messaging.EmailFileAttachment csvAttc = new Messaging.EmailFileAttachment();
blob csvBlob = Blob.valueOf(finalstr);
string csvname= 'CaseQA.csv';
csvAttc.setFileName(csvname);
csvAttc.setBody(csvBlob);
// Email process
Write code to email file