英文验证码（转）

前几天看的别人写的英文验证码的帖子 自己就引用了  然后整理了一下

 

xaml代码是：

<Window x:Class="SecurityCode.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SecurityCode"
        mc:Ignorable="d"
        x:Name="usercontrol"
        Title="MainWindow" MaxHeight="100" Width="900">
    <Grid>
        <StackPanel Height="50" Orientation="Horizontal">
            <Label Content="验证码"></Label>
            <TextBox  x:Name="SecurityTxt"  Width="200">
            </TextBox>
            <Button Content="发送" Click="Button_Click"></Button>
            <Image Width="400" Stretch="None" x:Name="image"></Image>
            <Button Content="重新获取验证码" Click="MainWindow_Loaded"></Button>
        </StackPanel>
    </Grid>
</Window>

引用的类是：

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using System.Windows.Shapes;

namespace SecurityCode
{
    public class EnglishSecurityCode
    {


        /// <summary>
        /// 英文字符验证码
        /// </summary>
        /// <param name="传出验证码"></param>
        /// <param name="验证码长度"></param>
        /// <returns></returns>
        public static byte[] GraphCode(out string code, int codeLength)
        {
            int Width = 80;//默认为100
            int Height = 30;//默认为40
            int FontSize = 20;//默认为20
            byte[] bytes = GraphCode(out code, codeLength, Width, Height, FontSize);
            return bytes;
        }
        /// <summary>
        /// 产生图形验证码
        /// </summary>
        /// <param name="传出验证码"></param>
        /// <param name="验证码字符"></param>
        /// <param name="Width"></param>
        /// <param name="Height"></param>
        /// <param name="FontSize"></param>
        /// <returns></returns>
        public static byte[] GraphCode(out string Code, int CodeLength, int Width, int Height, int FontSize)
        {
            string code = string.Empty;
            string sCode = string.Empty;
            System.Drawing.Color[] oColor ={
            System.Drawing.Color.Red,
            System.Drawing.Color.Black,
            System.Drawing.Color.Bisque,
            System.Drawing.Color.White,
            System.Drawing.Color.Blue,
            };
            string[] oFontNames = { "Times New Roman", "MS Mincho", "Book Antiqua", "Gungsuh", "PMingLiU", "Impact" };
            //验证码的字元集
            char[] oCharacter =
            {
                  'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','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','o','p','q','r','s','t','u','v','w','x','y','z'
              };
            Random oRnd = new Random();
            Bitmap oBmp = null;
            Graphics oGraphics = null;
            int N1 = 0;
            //生成验证码字串
            for (N1 = 0; N1 <= CodeLength - 1; N1++)
            {
                sCode += oCharacter[oRnd.Next(oCharacter.Length)];
            }
            oBmp = new Bitmap(Width, Height);
            oGraphics = Graphics.FromImage(oBmp);
            oGraphics.Clear(System.Drawing.Color.White);
            try
            {
                oGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
                Font f = new System.Drawing.Font("宋体", FontSize, (System.Drawing.FontStyle.Bold));
                // 前景色
                System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Black);
                // 背景色
                oGraphics.Clear(System.Drawing.Color.White);
                // 填充文字
                for (int i = 0; i < sCode.Length; i++)
                {
                    oGraphics.DrawString(sCode[i].ToString(), f, b, new System.Drawing.Rectangle(i * (FontSize - 2), 3, (FontSize - 2), Height));
                }
                // 随机线条
                System.Drawing.Pen linePen = new System.Drawing.Pen(System.Drawing.Color.Gray, 0);
                Random rand = new Random();
                for (int i = 0; i < 3; i++)
                {
                    int x1 = rand.Next(oBmp.Width);
                    int y1 = rand.Next(oBmp.Height);
                    int x2 = rand.Next(oBmp.Width);
                    int y2 = rand.Next(oBmp.Height);
                    oGraphics.DrawLine(linePen, x1, y1, x2, y2);
                }

                // 随机点
                for (int i = 0; i < 30; i++)
                {
                    int x = rand.Next(oBmp.Width);
                    int y = rand.Next(oBmp.Height);
                    oBmp.SetPixel(x, y, System.Drawing.Color.FromArgb(rand.Next(250), rand.Next(250), rand.Next(250)));
                }

                Code = sCode;
                //保存图片数据
                MemoryStream stream = new MemoryStream();
                oBmp.Save(stream, ImageFormat.Jpeg);
                //输出图片流
                return stream.ToArray();
            }
            finally
            {
                oGraphics.Dispose();
            }


        }
    }
}

后台代码是：

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace SecurityCode
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
this.Loaded += MainWindow_Loaded;
}
public static string Code = "";
byte[] englishchar;
private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
englishchar = EnglishSecurityCode.GraphCode(out Code, 4);
ImageSecurity = BytesToBitmapImage(englishchar);
this.image.Source = ImageSecurity;
}

public ImageSource ImageSecurity
{
get { return (ImageSource)GetValue(ImageSecurityProperty); }
set { SetValue(ImageSecurityProperty, value); }
}
public static readonly DependencyProperty ImageSecurityProperty =
DependencyProperty.Register("ImageSecurity", typeof(ImageSource), typeof(MainWindow), new PropertyMetadata(null));
public static BitmapImage BytesToBitmapImage(byte[] buffer)
{
var bitmap = new BitmapImage();
bitmap.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
bitmap.BeginInit();
bitmap.StreamSource = new MemoryStream(buffer);
bitmap.EndInit();
return bitmap;

}
private void Button_Click(object sender, RoutedEventArgs e)
{
var str = this.SecurityTxt.Text.ToString().ToLower();
if (str == Code.ToLower())
{
MessageBox.Show("验证正确");
}
else
{
MessageBox.Show("验证错误");
}

}
}
}

 

 

 

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