static-methods

So I came across this issues today and I couldn't find some meaningful explanation is there some non-subjective reason to use static methods when it comes to database interactions. Right now I'm working on a project where everything is made through stored procedures and for example I have some regular methods like : public void Delete(int clientID) { //calling store procedure } or public void Save(int clientID) { //calling store procedure } but I also have : public static Client GetByID(int id) { //calling stored procedure } or public static int AddNew(string firstName, string lastName...) { /

This code bellow gives me this error : Class 'MyNamespace\Database' not found . How do I reference a class that belongs to no namespace, from inside one ? Class Database { public function request() { } } namespace MyNamespace { class MyClass { public function myFuction() { Database::request(); } } } Try with \Database::request(); Also see Namespace Basics Example 1 in the PHP Manual 来源： https://stackoverflow.com/questions/6579040/calling-a-static-method-from-a-class-in-another-namespace-in-php

I have the following code (like, for real, this is my real code) : <?php class Foobar { public static function foo() { exit('foo'); } } When I run $foobar = new FooBar; $foobar->foo() it displays foo . Why would PHP try to use a static method in an object context ? Is there a way to avoid this ? Ok you guys didn't get my problem : I know the differences between static and non static methods and how to call them. That's my whole point, if I call $foobar->foo() , why does PHP tries to run a static method ? Note : I run PHP 5.4.4, error reporting to E_ALL . Fenton To call a static method, you don

I have a static function in a class. whenever I try to use non static data member, I get following compile error. An object reference is required for the nonstatic field, method, or property member Why is it behaving like that? A non-static member belongs to an instance. It's meaningless without somehow resolving which instance of a class you are talking about. In a static context, you don't have an instance, that's why you can't access a non-static member without explicitly mentioning an object reference. In fact, you can access a non-static member in a static context by specifying the object

Can anyone please explain why C# interfaces are not allowed to contain operators? Thanks. dkackman C# operators have to be static . Interfaces, by definition, apply to instances. There is no mechanism to require a type to implement static methods. 来源： https://stackoverflow.com/questions/6603940/c-sharp-interface-cannot-contain-operators

I have a class, lets say CAppPath which has a static method: public: static CString GetAppPath(); and in CAppPath.cpp it's defined as: CString CAppPath::GetAppPath() { return "C:\..\MypAth"; } Now I have another class CXMLHandler , and I have included CAppPath.h in it. But how do I call the GetAppPath() method? I've tried: #include "CAppPath.h" void CXMLHandler::MyMethod { CNDSClientDlg->GetAppPath(); } but it doesn't work. How should I access this method? Since it is a static method, do I need to create a object of the class or should I make the class itself static? You only need to use the