1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.Services; 6 using System.IO; 7 using System.Configuration; 8  9 namespace RGImageServer10 {11     /// <summary>12     /// ImageServices 的摘要说明13     /// </summary>14     [WebService(Namespace = "http://tempuri.org/")]15     [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]16     [System.ComponentModel.ToolboxItem(false)]17     // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。18     // [System.Web.Script.Services.ScriptService]19     public class ImageServices : System.Web.Services.WebService20     {21 22         [WebMethod]23         public string HelloWorld()24         {25             return "Hello World";26         }27         private byte[] Stream2Bytes(Stream theStream)28         {29             int num;30             MemoryStream stream = new MemoryStream();31             while ((num = theStream.ReadByte()) != -1)32             {33                 stream.WriteByte((byte)num);34             }35             theStream.Close();36             return stream.ToArray();37         }38         [WebMethod]39         public void GetTile(string imageName)40         {41             string filename = ConfigurationManager.AppSettings["ImagePath"] + @"\" + imageName;42             HttpContext context = this.Context;43             if (File.Exists(filename))44             {45                 try46                 {47                     FileStream theStream = File.OpenRead(filename);48                     context.Response.ContentType = "image/png";49                     byte[] buffer = Stream2Bytes(theStream);50                     context.Response.OutputStream.Write(buffer, 0, buffer.Length);51                 }52                 catch (Exception)53                 {54                     context.Response.StatusCode = 500;55                 }56             }57         }58     }59 }

 1 <?xml version="1.0" encoding="utf-8"?> 2  3 <!-- 4   有关如何配置 ASP.NET 应用程序的详细消息，请访问 5   http://go.microsoft.com/fwlink/?LinkId=169433 6   --> 7  8 <configuration> 9   <system.web>10     <compilation debug="true" targetFramework="4.0" />11     <webServices>12       <protocols>13         <add name="HttpGet" />14         <add name="HttpPost" />15         <add name="HttpSoap" />16       </protocols>17     </webServices>18   </system.web>19   <appSettings>20     <add key="ImagePath" value="E:\"/>21   </appSettings>22 </configuration>

 1 public partial class Form1 : Form 2     { 3         public Form1() 4         { 5             InitializeComponent(); 6         } 7         Stream ContentStream; 8         HttpWebResponse response = null; 9         string ContentType;10         string ContentEncoding;11         int ContentLength = 0;12         int BytesProcessed;13         private void button1_Click(object sender, EventArgs e)14         {15             ImageServices server = new ImageServices();16             string Url = "http://localhost:6235/ImageServices.asmx/GetTile?imageName=aa.png";17             string SavedFilePath = "D:\\bb.png";18             // Download to file19             string targetDirectory = Path.GetDirectoryName(SavedFilePath);20             if (targetDirectory.Length > 0)21                 Directory.CreateDirectory(targetDirectory);22             ContentStream = new FileStream(SavedFilePath, FileMode.Create);23             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);24             request.ContentType = "text/xml";25             using (response = request.GetResponse() as HttpWebResponse)26             {27                 // only if server responds 200 OK28                 if (response.StatusCode == HttpStatusCode.OK)29                 {30                     ContentType = response.ContentType;31                     ContentEncoding = response.ContentEncoding;32 33                     // Find the data size from the headers.34                     string strContentLength = response.Headers["Content-Length"];35                     if (strContentLength != null)36                     {37                         ContentLength = int.Parse(strContentLength);38                     }39                     //缓存字节数组，大小1500byte40                     byte[] readBuffer = new byte[1500];41                     using (Stream responseStream = response.GetResponseStream())42                     {43                         while (true)44                         {45                             //  Pass do.readBuffer to BeginRead.46                             int bytesRead = responseStream.Read(readBuffer, 0, readBuffer.Length);47                             if (bytesRead <= 0)48                                 break;49                             ContentStream.Write(readBuffer, 0, bytesRead);50                             BytesProcessed += bytesRead;51                         }52                     }53                     ContentStream.Close();54                     ContentStream.Dispose();55                     ContentStream = null;56                 }57             }58 59 60         }61     }