110 lines
3.8 KiB
C#
110 lines
3.8 KiB
C#
using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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namespace Hncore.Infrastructure.Common
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{
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public class ValidateCodeHelper
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{
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public static string MakeCode(int length = 4)
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{
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char[] allCharArray = new char[] { '2', '3', '4', '5', '6', '7', '8', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'W', 'X', 'Y', 'Z' };
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string randomCode = "";
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int temp = -1;
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Random rand = new Random();
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for (int i = 0; i < length; i++)
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{
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if (temp != -1)
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{
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rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
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}
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int t = rand.Next(allCharArray.Length);
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if (temp == t)
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{
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return MakeCode(length);
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}
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temp = t;
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randomCode += allCharArray[t];
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}
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return randomCode;
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}
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public static string MakeNumCode(int length = 4)
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{
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char[] allCharArray = new char[] { '1','2', '3', '4', '5', '6', '7', '8','9'};
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string randomCode = "";
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int temp = -1;
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Random rand = new Random();
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for (int i = 0; i < length; i++)
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{
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if (temp != -1)
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{
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rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
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}
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int t = rand.Next(allCharArray.Length);
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if (temp == t)
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{
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return MakeNumCode(length);
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}
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temp = t;
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randomCode += allCharArray[t];
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}
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return randomCode;
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}
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public static string MakeCharCode(int length = 4)
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{
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char[] allCharArray = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'W', 'X', 'Y', 'Z' };
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string randomCode = "";
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int temp = -1;
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Random rand = new Random();
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for (int i = 0; i < length; i++)
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{
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if (temp != -1)
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{
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rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
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}
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int t = rand.Next(allCharArray.Length);
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if (temp == t)
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{
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return MakeCharCode(length);
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}
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temp = t;
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randomCode += allCharArray[t];
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}
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return randomCode;
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}
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public static byte[] GenerateCodeImg(string code)
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{
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int Gheight = (int)(code.Length * 15) + 10;
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//gheight为图片宽度,根据字符长度自动更改图片宽度
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using (var img = new Bitmap(Gheight, 22))
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{
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using (var g = Graphics.FromImage(img))
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{
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SolidBrush whiteBrush = new SolidBrush(Color.White);
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g.FillRectangle(whiteBrush, 0, 0, Gheight, 22);
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int i = 0;
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foreach (char ch in code.ToCharArray())
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{
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g.DrawString(ch.ToString(),
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new Font("Arial", 13, FontStyle.Italic),
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new SolidBrush(Color.FromArgb(0, 0, 0)),
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i * 15,
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0);
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i++;
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}
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//在矩形内绘制字串（字串，字体，画笔颜色，左上x.左上y）
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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img.Save(ms, ImageFormat.Jpeg);
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return ms.ToArray();
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}
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}
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}
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}
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} |