linq extension methods

--Excerpt from Rocky RenAll methods of the HTML extension class have 2 parameters:Take a TextBox as an examplepublic static string TextBox (this htmlhelper htmlhelper, string name, Object value, idictionarypublic static string TextBox (this htmlhelper htmlhelper, string name, object value, Object htmlattributes)These 2 parameters represent a collection of attributes for this HTML tag. Use the following meth

Conditions that the extension method needs to meet1. The extension method must be defined in a static class.2. The extension method must be a static method.3. The first parameter of an extension method is prefixed with the This modifier.4. The extension method must be within

solution expansion comes in handy. Therefore, the extension method can be a perfect solution to the above two kinds of mechanisms produced or left behind problems and shortcomings, to learn more about the use of extension methods!Declaring an extension method must conform to the following characteristics:

In C #, extension methods enable you to add methods to existing class without creating a new derived class.Extension Methods Requirements: Define a static class to contain extension method. This class must is visible to client code. Implement the

resulting extension library file is in the modules subdirectory of the current directory,such as/usr/local/src/php-5.2.14/ext/curl/modules/curl.so4. Configuring the php.ini File# #将编译好的扩展库文件复制到apache2 the Modules directory.$CP/usr/local/src/php-5.2.14/ext/curl/modules/curl.so/usr/local/apache2/modules/.# #可以通过查看phpinfo信息来确定php the. ini file location, and then edit.# Locate the Settings extension directory

extension methods useIn a real project, you typically define a static class that contains common methods of action, such as string processing, determining whether a string is the correct phone number or email, and so on, defining these methods as static methods, using the st

classeatclassextensions { Public Static BOOLHaseat ( ThisIeatclass Eat,inti) {if(I >0)return true; return false; } }2. CallNew Eatclass (); var res = Eat.haseat (); // Output False var res1 = eat.haseat (1); // Output True3. If the extension method is under a different namespaceCode:namespacecompany.business.ext{/// ///Extension Classes/// Public Static classeatclassextensions { Public Static B

parameter constructorCollection initializerNew List {new demotest () {age=, name="xiaoming" , sex="boy"},new demotest () {age=, name=" Xiaohua ", sex="girl"} ;4. extension MethodsStatic void Main (string[] args) { Liststringnew liststring>() ; List. Contains// go To Definition }These with down arrows are extended, then we go to the definition (F12) See, this extension is defined in the

In C #, we can add extension methods to classes without writing subclasses, as long as the extended class cannot make static classes. The steps are as follows: Defines a static class to contain extension methods. The class must be visible to client code. For more information about accessibility rules, see Ac

Code Download: Click I downloadDirectory Objective Properties and Automatic properties Property Automatic properties Initialization device Object initializer Collection initializer Extension methods No parameter extension method Extended method with Parameters End O

From MSDN: the best. NET Learning Library https://msdn.microsoft.com/zh-cn/library/gg145045%28v=vs.110%29.aspxExtension methods enable you to "add" methods to an existing type without creating a new derived type, recompiling, or otherwise modifying the original type.　　An extension method is a special static method, but it can be called just like an instance metho

this+ type name + variable name, a new feature called "extension method" after. NET 3.0.The int type variable can call the ToString () method to convert the int type variable to a string variable, and if you need to change the form of the transformation, such as converting an int type variable to a string of the specified format, and this method invocation is very frequent, you can write an extension method

The previous article said that the extension method of the simple introduction, here is the continuation of the next chapter on the use of methods.extension methods can help us to add methods to existing types . To meet our needs. For example , We can use an extension method to Add a isvalidemailaddress method to the

[C # details] (1) Automatic attributes, initiators, and extension methods, Download Code: Click here to downloadDirectory Preface Attributes and automatic attributes Attribute Automatic attributes Initializer Object initializer Set Initiator Extension Method No parameter Extension Met

Yesterday, I talked to a friend in a PHP chat group (276167802, verification: csl, if you are interested, you can join in and discuss it) and mentioned six methods for PHP to get the file extension, now let's share with you: 1. string search and truncation method $ extension = subst yesterday, a friend in a PHP chat group (276167802, verification: csl, if you are

Http://blog.sina.com.cn/s/blog_a5193ed401016mvb.html An extension method is a special static method, but it can be called like an instance method of an extension type. Extension methods are defined as static methods, but they are called through the instance method syntax. T

Generic collections in C # provide a number of static extension methods based on Enumerable, such as Find, Average, Distinct, etc., in useBasic DatatypeCollection, you can call these methods directly, but if you are a custom type, you should do so based on the interface required by the extension method.Custom-type

C # Extension methodsI. Extension methods:1. What is the extension method and what is the role?Extension methods enable you to "add" methods to an existing type without having to create

Using the Silverlight Extension Methods feature, we can extend the basic class and add some Methods to the basic class. The added Methods can be called in the same way as the original Methods of the basic class, which is quite convenient. Let's look at an example. When using

PHP can obtain the file extension in four ways ,. PHP provides four methods for obtaining the file extension. This article describes four methods for obtaining the file extension by PHP. For your reference, refer to "export filename123.jpg". Method 1: four