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C# Acrobatics : Lambdas and Expression Methods as a replacement for NVelocity von .Net Smoothie

I’ve been very quiet recently. (I’m trying to not be so loud, Scott. ) You see, I’ve been writing a lot of ASP.Net code for a site I’m working on. And, to be honest, I’ve been having a lot of trouble. The source code for...

Design Guidelines for LINQ von .Net Smoothie

Have you wondered if and when you should use the new LINQ features in .Net 3.5? Like, where should I put a new extension method? Should I use Func<T> or a custom delegate? How do I best implement a mix-in (extension methods on an interface)? Well...

ExtensionMethod.net - An Extension Methods Database von .Net Smoothie

While surfing around tonight, I came across ExtensionMethod.net, a database of useful Extension Methods for C# 3.0 and VB 9. I thought it might be useful, so I added a few of my own extension methods. IComparable<T>.LessThan int.Times int.To There...

Remove and Sort Those Ugly “using-Statements” von .Net Smoothie

Visual Studio 2008 has lots of goodies in it, like LINQ syntax, CSS editing, and testing tools. There’s a lesser-known feature which I really appreciate though - the “Remove and Sort Usings” command in the C# editor. You activate the...

Refactoring C# Series: Aggregation of IEnumerable von .Net Smoothie

I was recently reading this book about the Ruby programming language, and came across this piece of example code: [1,3,5,7].inject(0) {|sum, element| sum+element} -> 16 [1,3,5,7].inject(1) {|product, element| product*element} ...

The LinqDataSource and the Hidden Viewstate von .Net Smoothie

Yesterday I thought I’d learn about the LinqDataSource in ASP.Net 3.5, and got an interesting surprise. The new LinqDataSource can also be used with a LINQ-to-SQL model to perform updates. You simply add the DataSource to your page, set the table...

How to Update Data with LINQ-to-SQL von .Net Smoothie

When learning LINQ-to-SQL, it’s not immediately obvious how to do an update. Querying is easy, and there are methods for inserting and deleting. Updating usually occurs by modifying an object already known to the DataContext and then calling SubmitChanges...
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Writing Custom Exception Classes the Quick Way von .Net Smoothie

Until recently I thought this was a well-known feature. After demonstrating it a few times, I found out it wasn’t. A long time ago, in an cubicle far, far away, someone created the .Net Framework. To cut a long story short, they simultaneously produced...

How to See the SQL Generated by a LINQ to SQL Command von .Net Smoothie

Quick tip: If you want to see the SQL generated by LINQ to SQL for a query or command, simply set the Log property of your generated DataContext class to an instance of a TextReader. If this is your code: using System; using System.Linq; using System...
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How to Use Grouping in C# LINQ Syntax von .Net Smoothie

When you started using LINQ, did you think it looked like SQL? I did. The more I learned LINQ, the more I realized it wasn’t anything like SQL. Take grouping, for example. Because LINQ has a group by statement, and it looks like SQL, I assumed that...
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LINQ to DataSets - the Missing Manual von .Net Smoothie

Last week I had to prepare a small presentation for a new LINQ workshop. For my research, I browsed through the MSDN documentation on LINQ where I came across a reference to “LINQ to DataSets”. I couldn’t find any more information about...
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Calculating the Fibonacci Sequence with C# 3.0 von .Net Smoothie

Scott Hanselman just posted his latest article in his weekly source code series. He shows various ways of producing the Fibonacci Sequence using various languages. I found it really interesting, for two reasons: I tried to do the C#3.0 one on my own after...

Using LinqPad to Create a Time-Selector Drop-Down List von .Net Smoothie

I am really getting into LINQ now! I think it’s fantastic. I recently wanted to develop a quick drop-down list in ASP.Net which allows a user to select a time of day from a list. The times are 15 minutes apart, so the list would look like this:...
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Using Lambda Expressions with LINQ to SQL von .Net Smoothie

When using LINQ, you need to be careful to use the right kind of Lambda expression. “What, there is more than one kind?”, I hear you gasp. There sure is! And if you aren’t careful, you’ll get a nice little message at runtime to...
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Inserting into a Table with LINQ to SQL von .Net Smoothie

While creating a little project, I wanted to know how to insert an object into a table using LINQ to SQL. Using Intellisense it wasn’t obvious at all. Scott Guthrie wrote a post on how do it. Unfortunately, the method name has changed since he did...
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