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Verification Code
/*
Using system. drawing;
Using system. Drawing. drawing2d;
Using system. Drawing. imaging;
Using system. Drawing. text;
*/
// Create a bitmap object
Bitmap newbitmap = new Bitmap (36, 16, pixelformat. format32bppargb );
// Create a drawing surface based on the previously created bitmap object
Graphics G = graphics. fromimage (newbitmap );
// Cr
The recently made micro-letterhead page encountered a page that had not been encountered before, just started to put in there did not write, but when the other pages are written well, still have to go back to study the page problem, just at the beginning I consulted the company's mobile research and development, from his inspiration, finally achieved this effect, Let's show you the effect chart first.
Effect Chart:
Input Verification
to get the character and draw
for (int i = 0; i {
int x = (i * + Rd. Next (3));
int y = Rd. Next (4) + 1;
Determine font
System.Drawing.Font font = new System.Drawing.Font ("Courier new",//Text font type
+ Rd. Next ()% 4,//text font size
System.Drawing.FontStyle.Bold);//text font style
char C = strcode[rd. Next (Strcode.length)]; Random Fetch character
Validatec
important.
Looking to the future of verification code
It has been reported earlier that Google is testing a new verification code technology that does not require input text like the traditional authentication code system, but
The Chinese Character verification code is more advanced than the letter or number verification code, and more effective to prevent illegal registration...
Example:Add an image control. The HTML attributes are as follows:
The source code of the checkcode. aspx file is as fo
as the login verification code during the MVC learning process.
The official website provides C # sdks and demos for developers to refer to. However, they are only in the Webform version and are not very readable. Currently, Webform is used for website development, based on the official Webform code, I will use it in ASP.. net mvc program.
Registration polar
Graphical verification code and asp.net graphic verification code drawn in ASP. NET
1 context. response. contentType = "image/jpeg "; 2 // generate a random Chinese verification code. 3 string yzm = "population, hands, numbers, nu
Document directory
There are many SNS communities or SNS-like websites, such as happy, 51, and on-campus websites, however, it is found that most communities do not provide the function of obtaining the friends list of QQ mailbox or QQ space when inviting friends. However, it seems that there are not many QQ articles on the internet, I hope this article will help you.
QqSpace and email login verification methods:
When logging on to the QQ space
1. Function description
When the user wants to obtain the authentication code, clicks obtains the authentication code freely, then starts the countdown, the Countdown period button text is the remaining time x seconds, and cannot press the state, after the countdown, the button changes for clicks sends.
2, analysis
The timer must be used. Click on the button a
(Getapplicationcontext (), "Authenticode sent", Toast.length_short). Show ();}} else {(throwable) data). Printstacktrace (); Toast.maketext (smssendforregisteractivity.this, "Captcha error", Toast.length_short). Show ();}}; @Overrideprotected void OnDestroy () {Super.ondestroy (); Smssdk.unregisteralleventhandler ();} /** * Intercept a continuous 4-digit combination ([0-9]{"+ 4+"}) from a string to intercept a six-bit number before and after an assertion cannot be used to get a dynamic password
After obtaining the SMS verification code, the button background changes and the countdown occurs. The SMS Verification Code
Private Button getVerCodeButton; // initialize getVerCodeButton = (Button) findViewById (R. id. login_get_ver_code);/*** display the time in the text
Today, verification code is very common on Android clients. Register the application account information directly through the mobile account and the authentication code. Many applications are registered in this way. A brief introduction.
Android to get SMS verification code
Course description
Hello everyone, in the last course, we started to learn howASP. NETGraph programming technology. Today, we have a deep understanding of the verification code technology.ASP. NET.
Verification code technology is currently widely usedWebProgramA security defense technology. When logging on, the s
For a website, a page that provides verification is required. Now we need to consider the verification code application on the page. Next we will give you a detailed explanation.1. Prepare a page for displaying and submitting the PHP Verification Code
Php
@
This article describes how to generate a Chinese Random verification code in python. For more information, see the following code:
#-*-Coding: UTF-8 -*-Import Image, ImageDraw, ImageFontImport randomImport math, string
Class RandomChar ():"Used to randomly generate Chinese characters """@ StaticmethodDef Unicode ():Val = random. randint (0x4E00, 0x9FBF)Return un
For a website, you will definitely need a page that provides validation functionality. Then we need to consider the application of the verification code in the verification page now. We're going to give you a detailed explanation of the
prepare a page to display and submit a PHP verification
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