private T GetEnumFromString<T>(string value) { try { T t; t = (T)Enum.Parse(typeof(T), value); return t; } catch (Exception E) { return (T)((object)0); } }
Hub of Computer Tricks and Programming
Generic Function to convert string to Enum
The Heartbleed Bug (CVE-2014-0160)
Neel Metha from Google Security discovered incorrect memory handling in Open TLS Heartbeat extension. By which attacker can access upto 64K of memory of client or server and can expose Private key and other secret data. |
For complete details, please visit references
References
Heartbleed
Ubuntu / Security Notice USN-2165-1
OpenSSL Security Advisory (published 7th of April 2014, ~17:30 UTC)
Categories:
Heartbleed
Dock panel like animated buttons in WPF(XAML)
Like dockpanel buttons(Buttons which grows up as mouse enters on button) in windows, we can have the buttons in WPF without writing any C# or VB code. This can be achieved by using EventTriggers & DoubleAnimations.
As mentioned in above image as mouse enters on Recycle Bin icon, it grows up, similar thing can be achieved in wpf, sample XAML is written below.
Code:
Categories:
EventTriggers,
WPF,
XAML
Deferred Execution in LINQ
Deferred Execution of Query
When we write any LINQ query as mentioned, it doesn't get executed immediately. It actually stores query in the variable and every time we use/enumerate the variable it executes the query and use the result. It is called deferred execution.
So that whenever filter variable(a) changes prior to the use of object(lStr), output will automatically changes.
class Sample { public int i; public String str; } static void Main(string[] args) { Listlst = new List (); lst.Add(new Sample() { i = 1, str = "String1" }); lst.Add(new Sample() { i = 2, str = "String2" }); lst.Add(new Sample() { i = 3, str = "String3" }); lst.Add(new Sample() { i = 4, str = "String4" }); int a = 1; IEnumerable lStr = (from l in lst where l.i == a select l); //It will just store query in lStr variable. }
When we write any LINQ query as mentioned, it doesn't get executed immediately. It actually stores query in the variable and every time we use/enumerate the variable it executes the query and use the result. It is called deferred execution.
Sample s = lStr.First(); ///Query will be executed here Console.WriteLine(s.str);
So that whenever filter variable(a) changes prior to the use of object(lStr), output will automatically changes.
Factory Design pattern
Factory design pattern provides you an interface creating a single object, but let subclass decide which class to instantiate. This pattern is used most frequently when we are having common functionality with different methods for different objects.
In that scenario, we will create an interface with defining common functionality which will be implemented by the classes. A class will be defined which will be used to identify which class to be instantiated for the object.
For example, We have to create reading utility and we are having 3 different kind of files 1st is pdf, 2nd is doc and 3rd is txt file. On all the files we have to perform open operation but way to open the file will be different. In this case we will create an Interface will contain OpenFile Operation. There will be classes for each file type and the classes will be implementing the factory interface(Example is given in C# Code Example.
C# Code Example:
In that scenario, we will create an interface with defining common functionality which will be implemented by the classes. A class will be defined which will be used to identify which class to be instantiated for the object.
For example, We have to create reading utility and we are having 3 different kind of files 1st is pdf, 2nd is doc and 3rd is txt file. On all the files we have to perform open operation but way to open the file will be different. In this case we will create an Interface will contain OpenFile Operation. There will be classes for each file type and the classes will be implementing the factory interface(Example is given in C# Code Example.
C# Code Example:
Categories:
C#,
Design Patterns,
dot net,
OOP
Subscribe to:
Posts (Atom)