场景

中文验证码效果

 

 

注：

博客主页：
https://blog.csdn.net/badao_liumang_qizhi
关注公众号
霸道的程序猿
获取编程相关电子书、教程推送与免费下载。

实现

新建一个窗体页面，设计布局如下

 

其中显示验证码的是PictureBox

然后进入窗体代码中修改为

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing.Imaging; using System.Drawing.Drawing2D; namespace ChineseCode {public partial class Form1 : Form{public Form1(){InitializeComponent();}public string txt = "";private void Form1_Load(object sender, EventArgs e){CreateImage();}private void CreateImage(){//获取GB2312编码页（表）Encoding gb = Encoding.GetEncoding("gb2312");//调用函数产生4个随机中文汉字编码object[] bytes = CreateCode(4);//根据汉字编码的字节数组解码出中文汉字string str1 = gb.GetString((byte[])Convert.ChangeType(bytes[0], typeof(byte[])));string str2 = gb.GetString((byte[])Convert.ChangeType(bytes[1], typeof(byte[])));string str3 = gb.GetString((byte[])Convert.ChangeType(bytes[2], typeof(byte[])));string str4 = gb.GetString((byte[])Convert.ChangeType(bytes[3], typeof(byte[])));txt = str1 + str2 + str3 + str4;if (txt == null || txt == String.Empty){return;}Bitmap image = new Bitmap((int)Math.Ceiling((txt.Length * 20.5)), 22);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);//画图片的背景噪音线for (int i = 0; i < 2; i++){Point tem_Point_1 = new Point(random.Next(image.Width), random.Next(image.Height));Point tem_Point_2 = new Point(random.Next(image.Width), random.Next(image.Height));g.DrawLine(new Pen(Color.Black), tem_Point_1, tem_Point_2);}Font font = new Font("宋体", 12, (FontStyle.Bold));LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);g.DrawString(txt, font, brush, 2, 2);//画图片的前景噪音点for (int i = 0; i < 100; i++){Point tem_point = new Point(random.Next(image.Width),random.Next(image.Height));image.SetPixel(tem_point.X,tem_point.Y, Color.FromArgb(random.Next()));}//画图片的边框线g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);pictureBox1.Image = image;}catch { }}/**//*此函数在汉字编码范围内随机创建含两个元素的十六进制字节数组，每个字节数组代表一个汉字，并将四个字节数组存储在object数组中。参数：strlength，代表需要产生的汉字个数*/public static object[] CreateCode(int strlength){//定义一个字符串数组储存汉字编码的组成元素string[] r=new String [16]{"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};Random rnd=new Random();//定义一个object数组用来object[] bytes=new object[strlength];/**//*每循环一次产生一个含两个元素的十六进制字节数组，并将其放入bject数组中每个汉字有四个区位码组成区位码第1位和区位码第2位作为字节数组第一个元素区位码第3位和区位码第4位作为字节数组第二个元素*/for(int i=0;i<strlength;i++){//区位码第1位int r1=rnd.Next(11,14);string str_r1 = r[r1].Trim();//区位码第2位rnd=new Random(r1*unchecked((int)DateTime.Now.Ticks)+i);//更换随机数发生器的种子避免产生重复值int r2;if (r1==13)r2=rnd.Next(0,7);elser2=rnd.Next(0,16);string str_r2 = r[r2].Trim();//区位码第3位rnd=new Random(r2*unchecked((int)DateTime.Now.Ticks)+i);int r3=rnd.Next(10,16);string str_r3 = r[r3].Trim();//区位码第4位rnd=new Random(r3*unchecked((int)DateTime.Now.Ticks)+i);int r4;if (r3==10){r4=rnd.Next(1,16);}else if (r3==15){r4=rnd.Next(0,15);}else{r4=rnd.Next(0,16);}string str_r4 = r[r4].Trim();//定义两个字节变量存储产生的随机汉字区位码byte byte1=Convert.ToByte(str_r1 + str_r2,16);byte byte2=Convert.ToByte(str_r3 + str_r4,16);//将两个字节变量存储在字节数组中byte[] str_r=new byte[]{byte1,byte2};//将产生的一个汉字的字节数组放入object数组中bytes.SetValue(str_r,i);   }return bytes;}private void button2_Click(object sender, EventArgs e){CreateImage();}private void button1_Click(object sender, EventArgs e){if (txtCode.Text.Trim() == "")return;else{if (txtCode.Text.Trim() == txt){MessageBox.Show("提示：验证码输入正确！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);}else{MessageBox.Show("提示：验证码输入错误，请重新输入！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);}}}} }

代码下载

https://download.csdn.net/download/BADAO_LIUMANG_QIZHI/12243420

与50位技术专家面对面20年技术见证，附赠技术全景图

总结

以上是生活随笔为你收集整理的Winform中实现中文验证码(附代码下载)的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。