深圳电影院排期,莴笋叶的做法,三邦车视网 欲望
前端添加的标签和方法：
验证码：
我要评论
$(function () {
$("#imgvalidatecode").click(function () {
dofresh();
});
dofresh();
})
function dofresh() {
var img = $("#imgvalidatecode");
img.attr("src", "verifycode.aspx?random=" + math.random());
} //添加的方法，src是生成图片的aspx的地址
然后在项目中在新建一个verifycode.aspx，下面是aspx的代码：
<%@ page language="c#" autoeventwireup="true" codebehind="verifycode.aspx.cs" inherits="form.verifycode" %> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="head1" runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> </div> </form> </body> </html>
接着是aspx.cs的代码：
using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;
using system.drawing;
namespace form
{
public partial class verifycode : system.web.ui.page
{
public static string hz;
/// <summary>
/// 验证码的最大长度
/// </summary>
public int maxlength
{
get { return 10; }
}
/// <summary>
/// 验证码的最小长度
/// </summary>
public int minlength
{
get { return 1; }
}
protected void page_load(object sender, eventargs e)
{
string[] str = createvalidatenumber(4);
string strcode = string.empty;
for (int i = 0; i < str.length; i++)
{
strcode += str[i];
}
createcheckcodeimage(str);
hz = strcode;
response.write(hz);
//验证码存入session
session["validatecode"] = hz;
}
/// <summary>
/// 生成验证码
/// </summary>
/// <param name="length">指定验证码的长度</param>
/// <returns>验证码</returns>
public string[] createvalidatenumber(int length)
{
string vchar = "1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,p" +
",q,r,s,t,u,v,w,x,y,z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,p,q" +
",r,s,t,u,v,w,x,y,z";
string[] vcarray = vchar.split(new char[] { ',' });//拆分成数组
string[] num = new string[length];
int temp = -1;//记录上次随机数值，尽量避避免生产几个一样的随机数
random rand = new random();
//采用一个简单的算法以保证生成随机数的不同
for (int i = 1; i < length + 1; i++)
{
if (temp != -1)
{
rand = new random(i * temp * unchecked((int)datetime.now.ticks));
}
int t = rand.next(vcarray.length-1);
if (temp != -1 && temp == t)
{
return createvalidatenumber(length);
}
temp = t;
num[i - 1] = vcarray[t];
//num.setvalue(vcarray[t]);
//vnum += vcarray[t];
}
return num;
}
private void createcheckcodeimage(string[] checkcode)
{
if (checkcode == null || checkcode.length <= 0)
return;
system.drawing.bitmap image = new system.drawing.bitmap((int)math.ceiling((checkcode.length * 32.5)), 60);
system.drawing.graphics g = graphics.fromimage(image);
try
{
//生成随机生成器
random random = new random();
//清空图片背景色
g.clear(color.white);
//定义颜色
color[] c = { color.black, color.red, color.darkblue, color.green, color.orange, color.brown, color.darkcyan, color.purple };
//画图片的背景噪音线
for (int i = 0; i < 25; i++)
{
int cindex = random.next(7);
int findex = random.next(5);
int x1 = random.next(image.width);
int x2 = random.next(image.width);
int y1 = random.next(image.height);
int y2 = random.next(image.height);
// g.drawline(new pen(c[cindex]), x1, y1, x2, y2);
}
//定义字体
string[] f = { "verdana", "microsoft sans serif", "comic sans ms", "arial", "宋体" };
for (int k = 0; k <= checkcode.length - 1; k++)
{
int cindex = random.next(7);
int findex = random.next(5);
font drawfont = new font(f[findex], 26, (system.drawing.fontstyle.bold));
solidbrush drawbrush = new solidbrush(c[cindex]);
float x = 5.0f;
float y = 0.0f;
float width = 42.0f;
float height = 48.0f;
int sjx = random.next(10);
int sjy = random.next(image.height - (int)height);
rectanglef drawrect = new rectanglef(x + sjx + (k * 25), y + sjy, width, height);
stringformat drawformat = new stringformat();
drawformat.alignment = stringalignment.center;
g.drawstring(checkcode[k], drawfont, drawbrush, drawrect, drawformat);
}
//画图片的前景噪音点
for (int i = 0; i < 500; i++)
{
int x = random.next(image.width);
int y = random.next(image.height);
image.setpixel(x, y, color.fromargb(random.next()));
}
int cindex1 = random.next(7);
//画图片的边框线
g.drawrectangle(new pen(c[cindex1]), 0, 0, image.width - 1, image.height - 1);
system.io.memorystream ms = new system.io.memorystream();
image.save(ms, system.drawing.imaging.imageformat.gif);
response.clearcontent();
response.contenttype = "image/gif";
response.binarywrite(ms.toarray());
}
finally
{
g.dispose();
image.dispose();
}
}
}
}
于是！就可以生成验证码了，然后自己再把编写验证版的判断逻辑写好就可以啦！
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
如对本文有疑问，请在下面进行留言讨论，广大热心网友会与你互动！！ 点击进行留言回复
Net Core Web Api项目与在NginX下发布的方法
asp.net core3.1 引用的元包dll版本兼容性问题解决方案
IdentityServer4实现.Net Core API接口权限认证(快速入门)
ASP.NET Core MVC通过IViewLocationExpander扩展视图搜索路径的实现
网友评论