I want to create a button which will allow me to update task as completed directly from the list view without opening individual task.

This button will directly update status without having to refresh entire page. This task list view will be on home page.

how to create new "notes" related list using visualforce page?
as notes doesn't have option to sort it by created date. i want to create new related list same as notes

I followed below link code but it is giving "List has no rows for assignment to SObject" error.
My object is a custom object. ex: case__c
 

list<Messaging.SingleEmailMessage> mail = new list<Messaging.SingleEmailMessage>();
EmailTemplate et = [Select Id,Subject, Body from EmailTemplate WHERE developerName = 'Batch fail']; 
Messaging.SingleEmailMessage email=new Messaging.SingleEmailMessage();
String [] Addresses=new String[0]; 
addresses.add('xyz@xyz.com');
email.SetToaddresses(addresses);
email.setTemplateId(et.Id);
 email.setSaveAsActivity(false);
mail.add(email);
Messaging.sendEmail(mail);  
}


I tried everything. Nothing is working. 
 //  Messaging.SingleEmailMessage[] messages = new List<Messaging.SingleEmailMessage> {email};
//Messaging.SendEmailResult[] results=Messaging.sendEmail(messages);
//Messaging.sendMail(messages);
 // Messaging.SendEmailResult [] r = Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});
//List<Messaging.SendEmailResult>results=Messaging.sendMail(email);
//Messaging.sendMail(new Messaging.SingleEmailMessage[] {email});

Opportunity stage can be changed only when there's atleast 1 Opportunity contact Role(Related List). or else it will throw error "Add Contact Role".
-Trigger on Opportunity

I want to create a button which will allow me to update task as completed directly from the list view without opening individual task.

This button will directly update status without having to refresh entire page. This task list view will be on home page.

I followed below link code but it is giving "List has no rows for assignment to SObject" error.
My object is a custom object. ex: case__c
 

Hi, if you open a standard page there is a related list called notes & attachments.

I want to show it on a visualforce page and cannot find out how anywhere in the documentation. 

I am a very new developer learning as I go. Could someone please help.

Sorry it is probably very easy but so much documentation and over 2hrs searching with no results!!

 

Thanks

 

Steve