Question

I have a message list having members:

Text = m.Text, User = m.User, Date = m.Date

This list include all the messages like

Text = "How Are You"
User = "Michael"
Date = "1/1/12"

Text = "Well Done"
User = "Michael"
Date = "2/1/12"

Text = "Who?"
User = "John"
Date = "1/1/12"

I kindly require to get the newest messages from the people which won’t show multiple messages from the same person and give only the last one like:

Text = "Well Done"
User = "Michael"
Date = "2/1/12"

Text = "Who?"
User = "John"
Date = "1/1/12"

As you see; I want to eliminate the previous message from the same person.

I am currently using:

var messages = (from m in mList select new
{
Text = m.Text, 
User = m.User, 
Date = m.Date
}).ToList();

What should I add to this query to achieve my goal?

Thank you!

Answer 1

var messages = (from m in mList select new
{
   Text = m.Text, 
   User = m.User, 
   Date = m.Date
})
.GroupBy(m => m.User)
.Select(g => g.OrderByDescending(m => m.Date).First())
.ToList();