Linq Queries : Translate Local variable references

Question

Hello !
I'm using the information from this MSDN Blog :
http://blogs.msdn.com/b/mattwar/archive/2007/08/01/linq-building-an-iqueryable-provider-part-iii.aspx
everything works very well except the case when I have a DateTime variable inside the query that I have to translate .
This is my case :
On my database I have the table orders where dt column have Date Type and store only the date.
Now if I have this query :
DateTime dt1 = Convert.ToDateTime("01/01/2012");
var query = db.Orders.Where(c => c.dt == dt1);
If I try to translate , the returned expression is :
SELECT * FROM (SELECT * FROM Orders) AS T WHERE (dt = '01/01/2012 12:00:00 AM')
As you can see the translated query contains the time at the end , and my query everytime return no records.
What can I do that in translated query the value to be only the date without the time.?
I try many variants , I format the variable only to date format , but it's the same thing.
Thank you !

Answer 1

the simpliest solution would be to use the Date-Portion of your DateTime-Object
another Solution would be the ToString method like
c.dt.ToString("MM.dd.YYYY") == dt1.ToString("MM.dd.YYYY")
it may not be exactly like this... but you'll find the right toString method yourself. There is even a toString-Method wich you can pass a CultureInfo-object, but i found the best way for coparing Dates is to provide a const format-string that is used to
compare DateTime-Types.
To put in some extra suggar, you could try to override the DateTime-Equal-Operator-Implementation.