WebService上传文件到服务器（转）

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;

/// <summary>
///FileHelper 的摘要说明
/// </summary>
public class FileHelper
{
public static string TxtExtensions = "doc,docx,docm,dotx,dotm,txt,xml,rft,htm,html,mht,mhtml,wps,wtf";
public static string XlsExtensions = "xls,xlsm,xlsb,xlsm,csv";
public static string ImageExtensions = "jpg,jpeg,jpe,jfif,png,tif,tiff,gif,bmp,dib";
public static string UpdateExtensions = "zip,rar";

/// <summary>
/// 保存文件
/// </summary>
/// <param name="fBitys"></param>
/// <param name="fileName"></param>
/// <param name="eMsg"></param>
/// <returns></returns>
public static bool SaveFile(byte[] fBitys, string fileName, ref string eMsg)
{
try
{
MemoryStream memoryStream = new MemoryStream(fBitys); //1.定义并实例化一个内存流，以存放提交上来的字节数组。
FileStream fileUpload = new FileStream(fileName, FileMode.Create); ///2.定义实际文件对象，保存上载的文件。
memoryStream.WriteTo(fileUpload); ///3.把内存流里的数据写入物理文件
memoryStream.Close();
fileUpload.Close();
fileUpload = null;
memoryStream = null;
return true;
}
catch (Exception ex)
{
eMsg = ex.Message;
return false;
}
}

/// <summary>
/// 文件类型
/// </summary>
public enum FileType
{
/// <summary>
/// 文本文件
/// </summary>
Text,
/// <summary>
/// 图片文件
/// </summary>
Image,
/// <summary>
/// Excel文件
/// </summary>
Excel,
/// <summary>
/// 其他
/// </summary>
Other,
UpdateFile
}

public static FileType GetFileType(string fileName)
{
string ext = Path.GetExtension(fileName);
if (TxtExtensions.ToUpper().Contains(ext.ToUpper().Replace(".", "")) == true)
{
return FileType.Text;
}
else if (XlsExtensions.ToUpper().Contains(ext.ToUpper().Replace(".", "")) == true)
{
return FileType.Excel;
}
else if (ImageExtensions.ToUpper().Contains(ext.ToUpper().Replace(".", "")) == true)
{
return FileType.Image;
}
else if (UpdateExtensions.ToUpper().Contains(ext.ToUpper().Replace(".", "")) == true)
{
return FileType.UpdateFile;
}
else
{
return FileType.Other;
}
}

public static System.Collections.Generic.Dictionary<FileType, string> filePathDic = new System.Collections.Generic.Dictionary<FileType, string>();
public static string GetFilePath(FileType fType)
{
try
{
if (filePathDic.Keys.Contains(fType) == true)
{
return filePathDic[fType];
}
else
{
string filePath = "";
switch (fType)
{
case FileType.Excel:
filePath = ConfigurationSettings.AppSettings["ExcelFilePath"];
break;
case FileType.Image:
filePath = ConfigurationSettings.AppSettings["ImageFilePath"];
break;
case FileType.Other:
filePath = ConfigurationSettings.AppSettings["OtherFilePath"];
break;
case FileType.Text:
filePath = ConfigurationSettings.AppSettings["TextFilePath"];
break;
case FileType.UpdateFile:
filePath = ConfigurationSettings.AppSettings["UpdateFilePath"];
break;
}
if (string.IsNullOrEmpty(filePath))
{
return "";
}
else
{
filePathDic[fType] = filePath;
return filePath;
}
}
}
catch
{
return "";
}
}
}

定义WebService方法

[WebMethod]
public string UploadFile(byte[] fBytes, string fileName, ref string eMsg)
{
try
{
FileHelper.FileType ft = FileHelper.GetFileType(fileName);
string saveName = DateTime.Now.ToString("yyyyMMddHHmmssffffff") + ((int)((new Random()).NextDouble() * 1000000)).ToString() + Path.GetExtension(fileName);
string savePath = "";
switch (ft)
{
case FileHelper.FileType.Excel:
savePath = System.Configuration.ConfigurationManager.AppSettings["ExcelFilePath"] + "\\" + saveName;
break;
case FileHelper.FileType.Image:
savePath = System.Configuration.ConfigurationManager.AppSettings["ImageFilePath"] + "\\" + saveName;
break;
case FileHelper.FileType.Text:
savePath = System.Configuration.ConfigurationManager.AppSettings["TextFilePath"] + "\\" + saveName;
break;
case FileHelper.FileType.UpdateFile:
savePath = System.Configuration.ConfigurationManager.AppSettings["UpdateFilePath"] + "\\" + fileName;
break;
case FileHelper.FileType.Other:
savePath = System.Configuration.ConfigurationManager.AppSettings["OtherFilePath"] + "\\" + saveName;
break;
}

MemoryStream memoryStream = new MemoryStream(fBytes); //1.定义并实例化一个内存流，以存放提交上来的字节数组。
FileStream fileUpload = new FileStream(savePath, FileMode.Create); ///2.定义实际文件对象，保存上载的文件。
memoryStream.WriteTo(fileUpload); ///3.把内存流里的数据写入物理文件
memoryStream.Close();
fileUpload.Close();
fileUpload = null;
memoryStream = null;

//获取IP地址
System.Net.IPHostEntry entry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
System.Net.IPAddress[] addrs = entry.AddressList;
string ipAddress = "";
if (addrs.Length > 0)
{
foreach (System.Net.IPAddress ipAddr in addrs)
{
if (ipAddr.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
ipAddress = ipAddr.ToString();
break;
}
}
if (ipAddress == "")
ipAddress = addrs[0].ToString();
}
if (ft == FileHelper.FileType.UpdateFile)
{
return string.Format("http://{0}{1}/getUpdateFile.ashx?fn={2}", ipAddress, Server.HtmlEncode(HttpContext.Current.Request.ApplicationPath), fileName);
}
else
{
return string.Format("http://{0}{1}/ShowImage.ashx?fn={2}", ipAddress, Server.HtmlEncode(HttpContext.Current.Request.ApplicationPath), saveName);
}
}
catch (Exception ex)
{
eMsg = ex.Message;
return "";
}
}

以上方法返回一个服务器路径，其中ShowImage.ashx这个页面用于显示图片，getUpdateFile.ashx这个页面用于下载文件，代码如下：

public class ShowImage : IHttpHandler
{
public static string FilePath = FileHelper.GetFilePath(FileHelper.FileType.Image);
public void ProcessRequest(HttpContext context)
{
string fileName = context.Request.QueryString["fn"];

fileName = FilePath + "\\" + fileName;
context.Response.ContentType = "image/JPEG";
try
{
context.Response.WriteFile(fileName);
context.Response.Flush();
}
catch (Exception ex)
{
context.Response.Write(ex.Message);
}
}

public bool IsReusable
{
get
{
return false;
}
}

}

public class getUpdateFile : IHttpHandler
{

public void ProcessRequest(HttpContext context)
{
string fileName = context.Request.QueryString["fn"];

context.Response.ContentType = "application/octet-stream";
//通知浏览器下载文件而不是打开
context.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
try
{
if (!string.IsNullOrEmpty(fileName))
{
string filePath = FileHelper.GetFilePath(FileHelper.FileType.UpdateFile) + "\\" + fileName;//路径

//以字符流的形式下载文件
byte[] bytes = null;
using (System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open))
{
bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
}
context.Response.BinaryWrite(bytes);

}
}
catch
{
}
context.Response.Flush();
context.Response.End();
}

public bool IsReusable
{
get
{
return false;
}
}

}

客户端代码

public static string UpLoadFile(string fileName, ref string eMsg)
{
//wms:WebService
if (wms == null)
{
wms = new Service();
}
byte[] fByte;

fByte = File.ReadAllBytes(fileName);

return wms.UploadFile(fByte, fileName, ref eMsg);
}