csharp: 图片字符间距

引用WINDOWS API:

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[DllImport("gdi32.dll", CharSet = CharSet.Auto)] public static extern int SetTextCharacterExtra(IntPtr hdc, int nCharExtra);//图片字符间距 [DllImport("gdi32.dll")] public static extern bool DeleteObject(IntPtr handle); [DllImport("gdi32.dll")] public static extern IntPtr SelectObject(IntPtr hdc, IntPtr bmp);

 .NET 2.0

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/// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         /// <param name="fontSpace"></param>         private void pictureBox_Paint(object sender, PaintEventArgs e)         {             Graphics g = e.Graphics;             Font font = new Font("宋体", 12.0F);               Brush brush = Brushes.Red;             string text2 = "涂聚文";             IntPtr hdc = e.Graphics.GetHdc();             SetTextCharacterExtra(hdc, 16); // 设置字符间距               e.Graphics.ReleaseHdc(hdc);             e.Graphics.DrawString(text2, font, brush, 20, 25);//               //pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);         }

 .NET 3.5以上:

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/// <summary>        /// 图片的字符间距(只对中文，数字，字母，符号有效，在中文环境下，中文日文混排无效)        /// 涂聚文        /// .net3.0以上        /// </summary>        /// <param name="width">图片宽度</param>        /// <param name="height">图片高度</param>        /// <param name="space">字间距</param>        /// <param name="strtext">要显示的文字</param>        /// <returns>图片</returns>        Bitmap CreateImageString(int width, int height,int space ,string strtext)        {            Bitmap image = new Bitmap(width, height);            using (Graphics g = Graphics.FromImage(image))            {                //绘制图片边框                //g.DrawRectangle(Pens.Black, 0, 0, width - 1, height - 1);                  Font font = new Font("宋体", 12.0F);                  Brush brush = Brushes.Red;                //绘制设置了字符间距的输出                DrawStringExtra(g, space, x =>                {                    x.DrawString(strtext, font, brush, 0, 2);                });            }            return image;        }            /// <summary>        ///        /// </summary>        /// <param name="g"></param>        /// <param name="nCharExtra"></param>        /// <param name="action"></param>        void DrawStringExtra(Graphics g, int nCharExtra, Action<Graphics> action)        {            IntPtr hdc = g.GetHdc();            SetTextCharacterExtra(hdc, nCharExtra);            try            {                using (Graphics g1 = Graphics.FromHdc(hdc))                {                    action(g1);                }            }            finally            {                SetTextCharacterExtra(hdc, 0);                g.ReleaseHdc(hdc);            }        }

 调用:(可以应用于打印中)

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1	pictureBox1.Image = CreateImageStrin(100, 30, 10, "3315000");

 .net 2.0自写填空格来设置字间距，高版本有：Padding,PadRight,PadLeft

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/// <summary>        /// 字符填充空格，而从设置字符间距        /// 涂聚文        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public string SetPadstring(string str,int padwidth)        {            string s = string.Empty;            string m = string.Empty;            if (str.Length > 0)            {                char[] arr = str.ToCharArray();                foreach (char d in arr)                {                    //MessageBox.Show(d.ToString());                    m = m + d + PadRight(padwidth);                }            }            s = m;            return s;        }            /// <summary>        /// 填充空格        /// </summary>        /// <param name="totalWidth"></param>        /// <returns></returns>        public string PadLeft(int totalWidth)        {                  string s="";                  if (totalWidth > 0)                {                    for (int i = 0; i < totalWidth; i++)                    {                        s =" "+ s  ;                    }                }                return s;       }          /// <summary>       /// 填充空格        /// </summary>        /// <param name="TotalWidth"></param>        /// <returns></returns>        public string PadRight(int TotalWidth)        {            string s = "";            if (TotalWidth > 0)            {                for (int i = 0; i < TotalWidth; i++)                {                    s = s + " ";                }            }              return s;        }

　　

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//测试                           string cs = "331500涂聚文";             //char[] arr = cs.ToCharArray();             //foreach (char d in arr)             //{             //    //MessageBox.Show(d.ToString());             //    m = m + d+PadRight(1);             //}             //MessageBox.Show(m);             MessageBox.Show(SetPadstring(cs, 1));