Archive for the ‘C# 2.0’ Category
Posted by jpluimers on 2011/04/05
While browsing for some less used but useful C# features, I came across a great post by Michael (Mike) Ward from Blue Onion Software on Favorite C# Idioms based on the great Hidden Features of C# thread on StackOverflow.
Mike starts with
There’s a great post on Stackoverflow about hidden features in C#. I prefer to think of these as idioms rather than hidden features since most are actually documented. Here are my favorites.
Then he continues with some nice examples of C# idioms.
Recommended reading!
–jeroen
via Favorite C# Idioms | Blue Onion Software.
Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2011/03/17
I maintain some .NET code that still uses the MDX 1.1 (since MDX 2.0 got cancelled, and this project cannot be brought to XNA).
Every now and then, you get a Loader Lock error.
ZBfufer provides the solution (I always use choice #3): Read the rest of this entry »
Posted in .NET, C#, C# 2.0, C# 3.0, Development, Software Development, Visual Studio 2005, Visual Studio 2008, Visual Studio and tools | Leave a Comment »
Posted by jpluimers on 2011/03/10
I usually forget the exact details on C# constraints when using generics.
One of the especially irritating things is that you cannot apply all the constraints you want.
Some built-in language features are covered by special types in the .NET framework class library, for instance enums.
Which means that code like this will not compile:
// Error 1 Constraint cannot be special class 'System.Enum'
public static T StringToEnum(string name) where T : System.Enum
{
return (T)Enum.Parse(typeof(T), name);
}
You need to replace it with the code below, which uses the fact that an enum is a ValueType (hence the struct constraint) implementing the interfaces IComparable, IFormattable and IConvertible constraints: Read the rest of this entry »
Posted in .NET, C#, C# 2.0, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2011/02/24
Often I explain to people that there are a lot of .NET languages, because the .NET IL is rich, so the individual languages can focus on the IL pieces they do best.
This also means, that most languages have some support for specific pieces of IL that other languages do not have support for.
The IL Exception Filter feature is one such thing. It is supported by for instance VB.NET but not by C# as Junfeng Zhang explains:
C# does not support exception filter. However, VB and IL support it. To add exception filter to C#, we can build a function in VB or IL, then call it in C#.
Read his full article for the complete code.
–jeroen
via: Exception Filter – Junfeng Zhang’s Windows Programming Notes – Site Home – MSDN Blogs.
Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Development, Software Development, VB.NET | Leave a Comment »
Posted by jpluimers on 2011/02/22
Often you work with projects not having the latest stuff.
Sometimes that is a good thing: latest stuff is not always best :-)
In this case, the client had Office 2003, and needed to do some Excel automation from .NET.
The development systems however had Office 2007 on it, so importing Excel defaults to the Office 2007 Primary Interop Assembly: Office version 12 in stead of 11. Read the rest of this entry »
Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Delphi, Development, Prism, Software Development, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools | Leave a Comment »
Posted by jpluimers on 2011/02/17
Recently, I wrote a bunch of code both in C# and Delphi to verify if two hosts are on the same IPv4 network.
Even though the public IPv4 address space is exhausted (IANA recently allocated the final two IPv4 blocks of their primary pool to APNIC, then allocated the five remaning /8 IPv4 blocks to the RIRs, thereby depleting the IPv4 pool), they are still used a lot, especially in private networks.
Over the next couple of weeks, you will see a couple of blog posts explaining:
- how to get the IPv4 addresses and network masks of network interfaces in your computer
- how to convert those to and from strings
- how to convert a host-name to a list of IP addresses
- how to lookup the current host-name
- how network masks are related to counting leading/trailing ones and zeros
- how to compare two IPv4 addresses given they have the same network masks
Those blog posts will have sample code in both Delphi and C#. And there will be unit tests to verify the underlying code.
–jeroen
Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Delphi, Development, Software Development | 2 Comments »
Posted by jpluimers on 2011/02/16
Each time I need to do Office COM interop, I wish they had overloaded methods: all those Type.Missing entries, and speed issues.
I know C# 4.0 makes missing parameters easier, but a lot of projects are not yet in Visual Studio 2010.
So this C# Excel Interop Use page by Sam Allen comes in handy.
–jeroen
Posted in .NET, C#, C# 2.0, C# 3.0, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2011/02/15
If you use Visual Studio 2005 for some old projects that have not yet been converted, and they open very slowly: read this post on If Your Visual Studio Solutions Open Slowly Check WebsiteCache by Thomas F. Abraham.
Emptying your WebsiteCache directory solves the issue: it had about 30-thousand empty directories in it.
The location depends on your Windows version:
- Windows XP, Windows Server 2003 and below:
“%USERPROFILE%\Local Settings\Application Data\Microsoft\WebsiteCache”
- Windows Vista, Windows Server 2008 and up:
“%USERPROFILE%\AppData\Local\Microsoft\WebsiteCache”
This bug has been fixed in Visual Studio 2008 and up.
–jeroen
via: If Your Visual Studio Solutions Open Slowly, Check WebsiteCache | Thomas F. Abraham – On Technology.
Posted in .NET, C#, C# 2.0, Development, Software Development, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools | Leave a Comment »
Posted by jpluimers on 2011/02/10
Greg Hewgill published a bunch Stack Overflow ebooks and StackExchange stats.
His readme explains a bit more on the books.
The blog he maintains makes up for some nice reading too.
Be sure to read the blog entry on the ebooks.
–jeroen
via Stack Overflow ebooks.
Posted in *nix, .NET, ASP.NET, C#, C# 2.0, C# 3.0, C# 4.0, Database Development, Delphi, Delphi for PHP, Development, HTML, HTML5, Java, Pingback, Power User, RegEx, Scripting, SocialMedia, Software Development, SQL, SQL Server, Stackoverflow, XML/XSD | Leave a Comment »
Posted by jpluimers on 2010/07/28
I want my exceptions to be bound to my business classes.
So you need your own exception class, and are expected to override the 4 constructors of the Exception class.
But I got a bit tired of writing code like this again and again:
using System;
using System.Runtime.Serialization;
namespace bo.Sandbox
{
public class MyException : Exception
{
public MyException()
: base()
{
}
public MyException(string message)
: base(message)
{
}
public MyException(string message, MyException inner)
: base(message, inner)
{
}
public MyException(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
}
}
Searching for Generic Exception Class did not reveal any generic exception classes.
So I wrote this instead: Read the rest of this entry »
Posted in .NET, C#, C# 2.0, Development, Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 