SourceCode/RFrameGenerate.Common/Tools/GraphicHelper.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.IO;
using System.Net;

namespace RFrameGenerate.Common
{
    public class GraphicHelper
    {
        public GraphicHelper()
        {

        }

        public GraphicHelper(int obstructlinenum, int obstructdotnum, bool isBorder, string rgb, bool isfliter = false)
        {
            this.obstructlinenum = obstructlinenum;
            this.isBorder = isBorder;
            this.obstructdotnum = obstructdotnum;
            this.isfliter = isfliter;
            this.rgb = rgb;
        }

        private int obstructlinenum = 25;
        private int obstructdotnum = 100;
        private bool isBorder = true;
        private string rgb = string.Empty;
        private bool isfliter = false;

        /// <summary>
        /// 创建验证码的图片
        /// </summary>
        /// <param name="containsPage">要输出到的page对象</param>
        /// <param name="validateNum">验证码</param>
        public byte[] CreateGraphic(string validateCode)
        {
            Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 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);

                try
                {
                    if (!string.IsNullOrEmpty(rgb))
                    {
                        List<string> rgbarr = rgb.Split(',').ToList();
                        Color customColor = Color.FromArgb(Convert.ToInt32(rgbarr[0]), Convert.ToInt32(rgbarr[1]), Convert.ToInt32(rgbarr[2]));
                        g.Clear(customColor);
                    }
                }
                catch
                {