长微博工具，文转图 C#实现

一来工作需要，而来我也一直有兴趣自己写一个长微博工具，其实思想很简单，首先文转图，然后拼图。下面来贴上自己写的文转图代码，以供大家研究参考。

下面这段是我封装的实现文转图的代码，里边对某个字体实际占的位符没有深入研究，按照微博的宽度440，我测试了字体为16，20，28 的占位符，有兴趣的朋友可以告知一下，有什么规律.

       /// <summary>        /// 文字转图        /// </summary>        /// <param name="text">文字</param>        /// <param name="fc">文字颜色</param>        /// <param name="fb">图片背景色</param>        /// <param name="fs">字体类型，比如正常，加粗，倾斜</param>        /// <param name="ft">文字类型，比如楷体_GB2312</param>        /// <param name="fn">默认为1；  文字类型名称。1：楷体_GB2312；</param>        /// <param name="fs">默认为1；  文字大小。1:16；2：20；3:24；</param>        /// <param name="hasBlank">默认为1；  是否开始空俩格。1：不空；2：空；</param>        /// <returns></returns>        public Bitmap WordToImg(string text,Color fc,Color fb,FontStyle ft,int fn=1,int fs=2,int hasBlank=1)        {            if (string.IsNullOrEmpty(text))                return null;            int number = 0;            string font_name = "";            int font_size = 14;            int line_add = 30;            int font_size_lenth = 21;            switch (fn)            {                case 1:                    font_name = "宋体";                    break;                case 2:                    font_name = "楷体";                    break;            }            switch (fs)            {                case 2:                    font_size = 16;                    line_add = 35;                    font_size_lenth = 23; //楷体是25                    break;                case 3:                    font_size = 20;                    line_add = 45;                    font_size_lenth = 28; //楷体是31                    break;                case 4:                    font_size = 24;                    line_add = 55;                    font_size_lenth = 35;                    break;            }            int row_lentht = Math.Abs(440 / font_size_lenth);            List<string> list = StringWrap(text, row_lentht, hasBlank, out number);            Bitmap image = new Bitmap(440, (number+1)*line_add);            Graphics gh = Graphics.FromImage(image);            int line = 15;            gh.Clear(fb);            Font font = new Font(font_name, font_size, (ft));            System.Drawing.Drawing2D.LinearGradientBrush brush = null;            for (int i = 0; i < number; i++)            {                try                {                    brush = new System.Drawing.Drawing2D.LinearGradientBrush(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), fc, Color.DarkRed, 1.2f, true);                    gh.DrawString(list[i], font, brush, 20, line);                    line = line + line_add;                }                catch (Exception e)                {                    Console.WriteLine(e.ToString());                }            }            image.Save(@"D:\工作\调试\ConvertWordsToImg\aa.jpg", ImageFormat.Png);            return image;        }

好啦，下面贴上，将一段文字转换成图片能容纳的一定长度

 /// <summary>        /// 将一句话按指定是字符数切开        /// </summary>        /// <param name="str"></param>        /// <param name="num">指定每行字符数</param>        /// <param name="hasBlank">是否开始空俩个</param>        /// <returns></returns>        public List<string> StringWrap(string str, int num,int hasBlank, out int count)        {            List<string> list = new List<string>();            Regex reg = new Regex(@"^[a-z0-9]+{1}quot;);            double number = 0;            int _count = 0;            int _number=0;            StringBuilder sb = new StringBuilder();            if (hasBlank == 1)                sb.Append("    ");            try            {                foreach (char c in str)                {                    if (_number == 0 && hasBlank == 1)                        number += 2;                    bool result = reg.IsMatch(c.ToString());                    if (result)                        number += 0.5;                    else                        number++;                    sb.Append(c.ToString());                    if (number >= num)                    {                        list.Add(sb.ToString());                        sb = new StringBuilder();                        number = 0;                        _count++;                    }                    if (_number == str.Length-1)                    {                        list.Add(sb.ToString());                        _count++;                    }                    _number++;                }            }            catch             {                count = 0;                return null;            }            count = _count;            return list;                    }

下面来贴上多张图片按次序拼图的代码，对于图片宽度小于440，按居中处理，大于的超出部分不处理

   /// <summary>        /// 微博专用图片合成，因为微博图片宽度限制小于440，我们统一处理为440        /// </summary>        /// <param name="img"></param>        /// <returns></returns>        public Bitmap SynthesisImgW(List<Bitmap> bl)        {            int height = 0;            foreach (Bitmap map in bl)            {                height += map.Height+10;            }            Bitmap image = new Bitmap(440, height-10);            Graphics gh = Graphics.FromImage(image);            gh.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;            gh.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;            gh.Clear(Color.White);            int y = 0;            foreach (Bitmap map in bl)            {                gh.DrawImage(map, 0,y,map.Width,map.Height);                y += map.Height+10;            }            return image;        }

好了，这三个方法，让你轻松实现文转图，拼图功能，其实很简单，本人也不是什么代码高手，就是好奇写着玩，代码级别哪有错误还请各位看客多多海涵，也欢迎相互交流。