Kamus asked about a problem yesterday,If have a cold backup,But be short of lost document of among them a data,But put in all file,How should restore data file.

Start work try,It is following measure probably:

The article basically introduces 　 　 the main plot technology of.Net frame.The advantage that will discuss plot technique through brief introduction and program of give typical examples, inferior position and other are relevant note.

　 　Brief introduction

When 　 　 should write the program of system of Windows window of a model fortunately,Window body and accuse the operation such as scale, effect is not to need special those who try to consider.This is why?Through using.Net frame because of,Development staff can procrastinate move a series of accuse to window body,Write a few simple as associated as incident photograph code to press F5 in IDE next,A complete window system program was born!All accusing him him scale,Window body perhaps accuses size and shrink put adjust freely.Use via regular meeting here,And need causes what notice at one o'clock to dominate a result namely.Game,From the definition chart accuses and the writes the compose outside can needing programmer specified number to be used at answering Paint incident code of screen protection program.

The article is aimed at 　 　 to body of those Windows window develop personnel and conduce to them using simple plot technology in using to program process.Above all,We can discuss a few basic plot ideas.After all who is in charge of undertaking scale is operated?Program of system of Windows window is to know what when should undertake scale?Those scale code are placed where to be after all?Later,The double buffer technology that still will introduce image scale,You will see what how work it is,How realize cache and the picture that show actually through a method between alternant.Finally,We will be discussed " intelligence is invalid area " ,Weigh draw actually merely namely the invalid part on body of window of process of cleared perhaps application,The indication that accelerates a program and answer speed.The person that hope these concepts and technology can make introduction reads the article,And conduce to mix more quickly program of more effective system of window of development Windows.

Engine of image of use GDI+ of body of 　 　 Windows window,All plot code in the article can be involved use mandatory.Net frame to operate and use engine of Windows GDI+ image.

　 　 although the article is used at main window body plot to operate,But it was offerred likewise fast, effective and conduce to the technology that improves program performance and method.So,Before understanding chrestomathy language proposal reader has a basic knowledge to.Net frame,Include episode of body of Windows window Line of processing, simple GDI+ object for example,Pen and Brush.Familiar Visual Basic.Net or C# programming language.

　 　Concept

Process of 　 　 Windows application is him of responsible scale,When body of a window " sordid " ,That is to say window body changed size,Or part by cover of body of other program window,Or from the smallest when changing condition to restore,The information that the program can receive need scale.Windows plants this " sordid " condition is called " invalid (Invalidated) " condition,Our understanding is:Need weighs draw,When program of system of Windows window need weighs draw window it is met when body the information that gets scale from inside Windows message alignment.Go in the PaintBackground that course.Net frame encloses this information to deliver window form next and Paint incident,Proper in afore-mentioned incident book writes the code that is used technically at scale can.

The plot give typical examples with 　 simple 　 is as follows:

In Asp.net 2.0,Should accuse in different Web between call each other,Must want %26lt;%@ Reference VirtualPath=%26quot; another control a name %26quot; %26gt; will cite,Citing is as follows

Default.aspx:
%26lt;form Id=%26quot;form1%26quot; Runat=%26quot;server%26quot;%26gt;
%26lt;uc1:WEbUserControl Id=%26quot;WebUserControl1%26quot; Runat=%26quot;server%26quot;%26gt;
%26lt;/uc1:WEbUserControl%26gt;
%26lt;uc2:WEbUserControl2 ID=%26quot;WebUserControl2_1%26quot; Runat=%26quot;server%26quot; /%26gt;
%26lt;/form%26gt;

When personnel often hears an user to complain to call applied program first, the development of 　 　 ASP.NET 1.x can encounter initialization delay.After all,The first time the request can initiate process of a series,Include to run library initialization, analysis, compile ASPX page into intermediate language, compile the method into this locality code to wait a moment immediately.

A student little sister asks me today:The Chinese character is kept in the HttpCookie of Asp.net,Read why is taking a cost random code completely?Actually this is because of what the character codes and cause,The Chinese character is two encode,Just can produce so so random code comes out!The method that solves actually is very simple:When wanting to writing Cookie only,Code its with Url first,Write again next,Read when us when taking again decipher with respect to OK,Hope more student little sisters can solve it,Breathe out ah!

　　不管创建什么类型的应用程序，你都需要使用字符串。无论数据如何存储，终端用户总要与可读的文本打交道。因此，了解如何使用字符串是任何.NET开发者创建丰富的应用程序所需要学习的必要知识。除了向你展示在.NET框架中字符串的使用外，本文还将向你介绍正规表达式的知识。

　　除了向你展示如何使用.NET框架中的字符串外，本文还将向你介绍正规表达式。正规表达式是格式代码，不仅允许你验证一个特定字符串匹配一个给定的格式，而且你还可以使用正规表达式来从任何其它可能被认为是自由格式的文本中提取有意义的信息，例如从用户输入中提取第一个名字，或从一个数字输入中提取代码，或从一个URL中提取服务器名。

　　一、 使用字符串

　　使用字符串是创建高质量应用程序的一个必要的技巧。即使你在处理数字或图像数据，终端用户也需要上下文反馈。本文将向你介绍.NET字符串，如何格式它们，操作它们和比较它们，及其它有用的操作。

　　(一) .NET字符串简介

　　在.NET框架和通用语言运行时刻(CLR)以前，开发者总是花费大量时间处理字符串。一个字符串例程可重用库几乎是每一个C和C++程序员的工具箱中的一部分。编写在不同程序语言之间交换字符串数据的代码也是相当困难的。例如，Pascal把字符串存储为一个内存字符数组，其中，该数组的第一个元素指示字符串的长度；而C把字符串存储为一个具有可变长度的字符内存数组，字符串的末端加上一个ASCII null字符(在C中以"\0"表示)。

　　在.NET框架中，字符串以常量方式存储。这意味着，当你用C#(或任何其它.NET语言)创建一个字符串时，该字符串以一种固定大小存储在内存以便 CLR运行更快些。结果是，当你实现例如连接字符串或修改一个字符串中的单个字符时，CLR实际上是创建你的字符串的多个副本。

　　C#中的字符串与其它值类型例如整数或浮点数声明方式相同，见下面的例子:

The RSS of the website cites with two kinds of forms commonly.One kind is the Xml file that has existed,Undertake updating to its when updating a database next,Perhaps use other to safeguard a program to be updated for its.Another kind is RSS file is made in trends,When visitting certain address namely,The service carries a method to be read from the database take newest record,Make RSS file,The person that return a visit.