LINQ: display results from empty lists

Posted by Douglas H. M. on Stack Overflow See other posts from Stack Overflow or by Douglas H. M.
Published on 2010-04-06T21:18:29Z Indexed on 2010/04/06 21:23 UTC
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I've created two entities (simplified) in C#:

class Log {  
    entries = new List<Entry>();

    DateTime Date { get; set; }  
    IList<Entry> entries { get; set; }  
}  

class Entry {  
    DateTime ClockIn { get; set; }  
    DateTime ClockOut { get; set; }  
}  

I am using the following code to initialize the objects:

Log log1 = new Log() {
    Date = new DateTime(2010, 1, 1),                
};
log1.Entries.Add(new Entry() {
    ClockIn = new DateTime(0001, 1, 1, 9, 0, 0),
    ClockOut = new DateTime(0001, 1, 1, 12, 0, 0)
});

Log log2 = new Log()
{
    Date = new DateTime(2010, 2, 1),
};

The method below is used to get the date logs:

var query =  
    from l in DB.GetLogs()
    from e in l.Entries  
    orderby l.Date ascending  
    select new  
    {  
        Date = l.Date,  
        ClockIn = e.ClockIn,  
        ClockOut = e.ClockOut,  
    };  

The result of the above LINQ query is:

/*
 Date        | Clock In   | Clock Out
 01/01/2010  | 09:00      | 12:00    
*/

My question is, what is the best way to rewrite the LINQ query above to include the results from the second object I created (Log2), since it has an empty list. In the other words, I would like to display all dates even if they don't have time values.

The expected result would be:

/*
 Date        | Clock In   | Clock Out
 01/01/2010  | 09:00      | 12:00    
 02/01/2010  |            |            
*/

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