C# 合成图片

 1         /// <summary>
 2         /// 合并图片
 3         /// </summary>
 4         /// <param name="imageIds">图片ID集合</param>
 5         public static void CombinImage(params string[] imageIds)
 6         {
 7             Bitmap bg = new Bitmap(640, 658);
 8             Graphics g = Graphics.FromImage(bg);
 9             //清除画布,背景透明
10             g.Clear(Color.Transparent);
11 
12             for (int i = 0; i < imageIds.Length; i++)
13             {
14                 //路径
15                 string url = @"E:\Projects\ConsoleApplication\ConsoleApplication\";
16                 //取图
17                 Image img = Image.FromFile(url + imageIds[i] + ".png");
18                 //绘图
19                 g.DrawImage(img, 0, 0);
20             }
21 
22             g.Dispose();
23             //情况1、保存文件，自己再加下路径
24             bg.Save("ok", ImageFormat.Png);
25             
26             //情况2、保存二进制流入数据库
27             MemoryStream ms=new MemoryStream();
28             bg.Save(ms, ImageFormat.Png);
29             byte[] byteImage = new Byte[ms.Length];
30             byteImage = ms.ToArray();
31         }