C# – Page 2 – Andreas Plahn Developer Blog

Non CLS-Compliant Code in C# – CodeProject

Non CLS-Compliant Code in C# – CodeProject.

c# – Log4Net: Programmatically specify multiple loggers with multiple file appenders – Stack Overflow

via c# – Log4Net: Programmatically specify multiple loggers with multiple file appenders – Stack Overflow.

NET C# Common I/O Tasks

The System.IO namespace provides several classes that allow for various actions, such as reading and writing, to be performed on files, directories, and streams

via Common I/O Tasks.

c# – Check if ‘T’ inherits or implements a class/interface – Stack Overflow

typeof(IEmployee).IsAssignableFrom(typeof(T))

via c# – Check if ‘T’ inherits or implements a class/interface – Stack Overflow.

ide – Visual Studio 2013 Update 2 – C# navigation bar drop down menus not working – Stack Overflow

The dropdown menus in the code editor stopped working in Visual Studio 2013 for me.
The problem is a bug when using multiple monitors and a “leftmost” monitor that is not the “main” display…

The solution is quite simple for now: make your leftmost monitor the main monitor.
A bugfix is coming, included in next Visual Studio update.

More info:

ide – Visual Studio 2013 Update 2 – C# navigation bar drop down menus not working – Stack Overflow.

Simple validation of properties in EPiServer 6 using DataAnnotations with PageTypeBuilder

In EPiServer 7 you can easily add validation to pagetype properties with DataAnnotations attribute, like this:

[RegularExpression(@"^([A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,9})$"    , ErrorMessage = "Must be valid email address")]

1	[RegularExpression(@"^([A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,9})$" , ErrorMessage = "Must be valid email address")]

In EPiServer 6 you can create a custom property (involves creating some classes and messing up the db sometimes), or hook up onto global page save validation event and check if property x is valid and return e.message. (http://blog.bigfinger.se/2010/4/26/simple-validation-of-propertyvalues-in-episerver-cms-6.aspx)

Or, you can combine the usage of hooking up onto global pagedata validation with DataAnnotaions support, then you in fact
have something similar to the EPiServer 7 way with DataAnnotations support. Just go here: Validating page data with Data Annotations.
Thank you Stefan Forsberg.

PS:
the GlobalPageValidation_Validators event can be hooked onto through Global.asax.cs like this:

public class Global : EPiServer.Global
{
protected void Application_Start(Object sender, EventArgs e)
{

//Enables validation for pagetype properties with DataAnnotations
GlobalPageValidation.Validators += GlobalPageValidation_Validators;
}

void GlobalPageValidation_Validators(object sender, PageValidateEventArgs e)
{
PageDataValidator validator = new PageDataValidator();
var errors = validator.GetErrors(e.Page).ToList();

if (errors.Any())
{
e.IsValid = false;
foreach (var error in errors)
{
e.ErrorMessage += string.Format("{0} <br />", error);
}

}
}

public class Global : EPiServer.Global

{

protected void Application_Start(Object sender, EventArgs e)

{

//Enables validation for pagetype properties with DataAnnotations

GlobalPageValidation.Validators += GlobalPageValidation_Validators;

}

void GlobalPageValidation_Validators(object sender, PageValidateEventArgs e)

{

PageDataValidator validator = new PageDataValidator();

var errors = validator.GetErrors(e.Page).ToList();

if (errors.Any())

{

e.IsValid = false;

foreach (var error in errors)

{

e.ErrorMessage += string.Format("{0} <br />", error);

}

Also added an <br /> in case of several errors.
Validation Error message looks like this in EPiServer edit mode:

Its a bit on the simple side; remember to include which field its connected to in the errortext, no indication is shown next to the particular field.

Now you can just use DataAnnotations validation attributes, like these:

[RegularExpression]
[Required]
[StringLength]
[Range]

Inherit System.ComponentModel.DataAnnotations and override IsValid to do something more complicated with your validations.

Twenty C# Questions Explained

Are you a developer with coding questions? Many new and experienced developers visit Stackoverflow.com to find solutions and to help others resolve their computing questions and issues. This training session focuses on 20 of the top questions surrounding the C# language, based on number of views and votes on stackoverflow. Watch this session, and get your questions answered.

via Twenty C# Questions Explained.

SteveX Compiled » String Formatting in C#

Thank you SteveX.
Fast and simple overview of string formatting in c#.

SteveX Compiled » String Formatting in C#.

Popular .NET code – Runnable

Run asp.net c# popular snippets in the browser! Cool stuff.
here: Popular .NET code – Runnable.

Other languages as well: http://runnable.com/