一个简单的WebSerivce传递图片的例子(转贴)

WebService中实现了一个方法GetImage(),在内存中生成一张100x100的Bitmap.然后在该Bitmap上画一条线,再将这个图片转换为byte[]传递给调用者.调用的程式将该byte[]还原为Bitmap.
以下是代码:
WebService:

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.IO; using System.Drawing; using System.Drawing.Imaging; namespace WebService { /// <summary> ///MyWebService 的摘要描述 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // 若要允許使用 ASP.NET AJAX 從指令碼呼叫此 Web 服務，請取消註解下一行。 // [System.Web.Script.Services.ScriptService] public class MyWebService : System.Web.Services.WebService { [WebMethod] public byte[] GetImage() { //生成BitMap byte[] ret = null; Bitmap bm = new Bitmap(100,100); for (int i = 0; i < 100; i++) { bm.SetPixel(i,i,Color.Blue); } //从内存中读取出来存放到返回结果中 MemoryStream ms = new MemoryStream(); ImageCodecInfo[] inf = ImageCodecInfo.GetImageEncoders(); EncoderParameters eps = new EncoderParameters(1); Encoder ec = System.Drawing.Imaging.Encoder.ColorDepth; EncoderParameter ep = new EncoderParameter(ec,80); eps.Param[0] = ep; bm.Save(ms,inf.First(info => info.MimeType == "image/bmp"),eps); ret = new byte[ms.Length]; ret = ms.ToArray(); return ret; } } }