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本篇內(nèi)容主要講解“ASP.NET MVC怎么實(shí)現(xiàn)驗(yàn)證碼功能”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實(shí)用性強(qiáng)。下面就讓小編來帶大家學(xué)習(xí)“ASP.NET MVC怎么實(shí)現(xiàn)驗(yàn)證碼功能”吧!
前臺
復(fù)制代碼 代碼如下:
height="25" />
控制器
復(fù)制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Utility;
using Jellal**;
namespace sjlwebsite.Controllers
{
public class CommonController : Controller
{
#region 驗(yàn)證碼
[OutputCache(Duration = 0)]
public ActionResult VCode()
{
string code = ValidateCode.CreateRandomCode(4);
Session["vcode"] = code;
ValidateCode.CreateImage(code);
return View();
}
public string GetCode()
{
return Session["vcode"].ToStr();
}
#endregion
}
}
驗(yàn)證碼類
復(fù)制代碼 代碼如下:
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace Utility
{
///
/// 完美隨機(jī)驗(yàn)證碼 0.10
/// Verion:0.10
/// Description:隨機(jī)生成設(shè)定驗(yàn)證碼，并隨機(jī)旋轉(zhuǎn)一定角度，字體顏色不同
///
public class ValidateCode
{
///
/// 生成隨機(jī)碼
///
///
///
public static string CreateRandomCode(int length)
{
int rand;
char code;
string randomcode = String.Empty;
//生成一定長度的驗(yàn)證碼
System.Random random = new Random();
for (int i = 0; i < length; i++)
{
rand = random.Next();
if (rand % 3 == 0)
{
code = (char)('A' + (char)(rand % 26));
}
else
{
code = (char)('0' + (char)(rand % 10));
}
randomcode += code.ToString();
}
return randomcode;
}
///
/// 創(chuàng)建隨機(jī)碼圖片
///
///
public static void CreateImage(string randomcode)
{
int randAngle = 45; //隨機(jī)轉(zhuǎn)動角度
int mapwidth = (int)(randomcode.Length * 23);
Bitmap map = new Bitmap(mapwidth, 28);//創(chuàng)建圖片背景
Graphics graph = Graphics.FromImage(map);
graph.Clear(Color.AliceBlue);//清除畫面，填充背景
graph.DrawRectangle(new Pen(Color.Black, 0), 0, 0, map.Width - 1, map.Height - 1);//畫一個邊框
//graph.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;//模式
Random rand = new Random();
//背景噪點(diǎn)生成 www.jb51.net
Pen blackPen = new Pen(Color.LightGray, 0);
for (int i = 0; i < 50; i++)
{
int x = rand.Next(0, map.Width);
int y = rand.Next(0, map.Height);
graph.DrawRectangle(blackPen, x, y, 1, 1);
}
//驗(yàn)證碼旋轉(zhuǎn)，防止機(jī)器識別
char[] chars = randomcode.ToCharArray();//拆散字符串成單字符數(shù)組
//文字距中
StringFormat format = new StringFormat(StringFormatFlags.NoClip);
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
//定義顏色
Color[] c = { Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
//定義字體
string[] font = { "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋體" };
for (int i = 0; i < chars.Length; i++)
{
int cindex = rand.Next(7);
int findex = rand.Next(5);
Font f = new System.Drawing.Font(font[findex], 13, System.Drawing.FontStyle.Bold);//字體樣式(參數(shù)2為字體大小)
Brush b = new System.Drawing.SolidBrush(c[cindex]);
Point dot = new Point(16, 16);
//graph.DrawString(dot.X.ToString(),fontstyle,new SolidBrush(Color.Black),10,150);//測試X坐標(biāo)顯示間距的
float angle = rand.Next(-randAngle, randAngle);//轉(zhuǎn)動的度數(shù)
graph.TranslateTransform(dot.X, dot.Y);//移動光標(biāo)到指定位置
graph.RotateTransform(angle);
graph.DrawString(chars.ToString(), f, b, 1, 1, format);
//graph.DrawString(chars.ToString(),fontstyle,new SolidBrush(Color.Blue),1,1,format);
graph.RotateTransform(-angle);//轉(zhuǎn)回去
graph.TranslateTransform(2, -dot.Y);//移動光標(biāo)到指定位置
}
//graph.DrawString(randomcode,fontstyle,new SolidBrush(Color.Blue),2,2); //標(biāo)準(zhǔn)隨機(jī)碼
//生成圖片
System.IO.MemoryStream ms = new System.IO.MemoryStream();
map.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "image/gif";
HttpContext.Current.Response.BinaryWrite(ms.ToArray());
graph.Dispose();
map.Dispose();
}
}
}
到此，相信大家對“ASP.NET MVC怎么實(shí)現(xiàn)驗(yàn)證碼功能”有了更深的了解，不妨來實(shí)際操作一番吧！這里是創(chuàng)新互聯(lián)建站，更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢，關(guān)注我們，繼續(xù)學(xué)習(xí)！
本文標(biāo)題：ASP.NETMVC怎么實(shí)現(xiàn)驗(yàn)證碼功能-創(chuàng)新互聯(lián)
新聞來源：http://fisionsoft.com.cn/article/dhpgpc.html
