OrderBy making null records come last Entity Framework and Linq

Tim — Wed, 27 Jul 2011 11:45:02 +0000

Ever want to sort your result set but make sure the records with a null sorting column appear last?
See the example below

var results = (from x in EntityObjectContext.MyTable
select x
into grp
select new
{
mydata = grp,
myid = grp.id,
mysortingentity = grp.mysortingentity
}
).OrderBy(x => sortingcolumn == null).ThenBy(x => x.mysortingentity.Name).ThenBy(x => x.myid);

Watch this space, this can easily be transformed into a Extension Method. Check out this link http://tahirhassan.blogspot.com/2010/06/linq-to-sql-order-by-nulls-last.html, this Extension method works for LinqToSQL.

Using Nested Functions in C#

Tim — Sun, 07 Sep 2008 10:40:57 +0000

Scenario

We currently have a templating API system where this allows developers to use a combination of C# and HTML markup to customized the display of the client’s websites. In this case, I needed a way to quickly perform some calculations and formatting without having to declare the function at design-time. My problem was I was to pass in a Boolean, a integer and a string that performed specific logic to produce a outcome (a string).

Solution

I was able to use a Func delegate specifying the parameter types and the return type. With a help of Lambda expressions I was able to capture the input of the three variables and return the result.

Func nestedFunction = (b, i, s) => { //Do something return s; };
String foo = nestedFunction(true,1,”format string”);

References

http://www.codeguru.com/csharp/csharp/cs_misc/designtechniques/article.php/c12749/

Codelab Blog » Lambda

OrderBy making null records come last Entity Framework and Linq

Using Nested Functions in C#