生成文字图片：

/// <summary> /// 生成文字图片 /// </summary> /// <param name="text"></param> /// <param name="isBold"></param> /// <param name="fontSize"></param> public Image CreateImage(string text, bool isBold, int fontSize) { int wid = 400; int high = 200; Font font; if (isBold) { font = new Font("Arial", fontSize, FontStyle.Bold); } else { font = new Font("Arial", fontSize, FontStyle.Regular); } //绘笔颜色 SolidBrush brush = new SolidBrush(Color.Black); StringFormat format = new StringFormat(StringFormatFlags.NoClip); Bitmap image = new Bitmap(wid, high); Graphics g = Graphics.FromImage(image); SizeF sizef = g.MeasureString(text, font, PointF.Empty, format);//得到文本的宽高 int width = (int)(sizef.Width + 1); int height = (int)(sizef.Height + 1); image.Dispose(); image = new Bitmap(width, height); g = Graphics.FromImage(image); g.Clear(Color.White);//透明 RectangleF rect = new RectangleF(0, 0, width, height); //绘制图片 g.DrawString(text, font, brush, rect); //释放对象 g.Dispose(); return image; }

合并图片：

/// <summary> /// 合并图片 /// </summary> /// <param name="imgBack"></param> /// <param name="img"></param> /// <returns></returns> public static Bitmap CombinImage(Image imgBack, Image img, int xDeviation = 0, int yDeviation = 0) { Bitmap bmp = new Bitmap(imgBack.Width, imgBack.Height + img.Height); Graphics g = Graphics.FromImage(bmp); g.Clear(Color.White); g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height); //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高); //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框 //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高); g.DrawImage(img, imgBack.Width / 2 - img.Width / 2 + xDeviation, imgBack.Height + yDeviation, img.Width, img.Height); GC.Collect(); return bmp; }/// <summary> /// Resize图片 /// </summary> /// <param name="bmp">原始Bitmap</param> /// <param name="newW">新的宽度</param> /// <param name="newH">新的高度</param> /// <param name="mode">保留着，暂时未用</param> /// <returns>处理以后的图片</returns> public static Image ResizeImage(Image bmp, int newW, int newH, int mode) { try { Image b = new Bitmap(newW, newH); Graphics g = Graphics.FromImage(b); // 插值算法的质量 g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel); g.Dispose(); return b; } catch { return null; } }

MemoryStream保存到图片

Bitmap bmp = CombinImage(ms, img1); MemoryStream ms = new MemoryStream(); bmp.Save(ms, ImageFormat.Png);

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