Hello world!!

Tuesday, August 12, 2014

Static Class

Cannot derive from Static Class
Cannot create instance of Static class using new keyword
Static class can be public or internal
Static class can NOT be private or protected or protected internal
Static class can NOT have non-static members

static class ThisClassIsStatic

{

static string comment;

static int count = 0;

}

class ThisIsDervied : ThisClassIsStatic //NOT POSSIBLE

{

}

ThisClassIsStatic obj = new ThisClassIsStatic(); //NOT POSSIBLE

public static class ThisClassIsStatic //POSSIBLE

{

}

4)
private static class ThisClassIsStatic //NOT POSSIBLE

5)
static class ThisClassIsStatic
{
static string comment;
static int count = 0;
int index = 0; //NOT POSSIBLE

}

class Program
{
static void Main(string[] args)
{
B b = new B();
Console.Read();
}
}

class A
{
internal int x = 10;
public int MyProperty { get; set; }
public A()
{
Console.WriteLine("A Constructor");
}
}

class B:A
{
public B(): base()
{
Console.WriteLine("B Constructor ");
}
}

What's the output of the above program?

Note: base keyword can be used ONLY from derived class's constructor to access base class members (non-private members)

Saturday, August 9, 2014

C# Extension Method - Sample

class Program
{
static void Main(string[] args)
{
string s = "hello please tell me the word count";
Console.Write(s.WordCount());
Console.Read();
}
}

public static class StringExtension
{
public static int WordCount(this string value)
{
return value.Split(' ').Length;
}
}

Wednesday, July 23, 2014

Cyclomatic Complexity

Cyclomatic Complexity:

Measures structural complexity of code
It is created by calculating number of different code paths in program
In visual Studio 2012, use “Calculate Code Metrics” to identify cyclomatic complexity
Cyclomatic Complexity values from

1 to 10 is Simple program – Less risk
11 to 20 is medium complex program – Moderate Risk
21 to 50 is complex program – High Risk
>51 untestable program – Very high Risk

References:

http://www.codeproject.com/Articles/11719/Cyclomatic-Code-Complexity-Analysis-for-Microsoft

http://msdn.microsoft.com/en-us/library/bb385914.aspx

Saturday, June 21, 2014

Application Level Exception Handling in ASP.NET

This can be done in Global.asax within Application_Error method.

void Application_Error(object sender, EventArgs e)
{
Exception ex = Server.GetLastError();

if (ex.GetType() == typeof(HttpUnhandledException))
{
if (ex.Message.Contains("NoCatch") ||
ex.Message.Contains("maxUrlLength") ||
ex.Message.Contains("File does not exist."))
return;

Response.Write("~/Error.aspx");
}

Server.ClearError();
}