常用 文件上传方法

<httpRuntime executionTimeout=”300″ maxRequestLength=”40960″ useFullyQualifiedRedirectUrl=”false”/>

IServiceProviderprovider=(IServiceProvider)HttpContext.Current;
HttpWorkerRequestwr=(HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest));
byte[]bs=wr.GetPreloadedEntityBody();
.
if(!wr.IsEntireEntityBodyIsPreloaded())
{
intn=1024;
byte[]bs2=newbyte[n];
while(wr.ReadEntityBody(bs2,n)>0)
{
..
}
}

public class FileUpLoad
{
public FileUpLoad()
{

}
/**/
/// <summary>
/// 上传文件名称
/// </summary>
public string FileName
{
get
{
return fileName;
}
set
{
fileName = value;
}
}
private string fileName;

/**/
/// <summary>
/// 上传文件路径
/// </summary>
public string FilePath
{
get
{
return filepath;
}
set
{
filepath = value;
}
}
private string filepath;

/**/
/// <summary>
/// 文件扩展名
/// </summary>
public string FileExtension
{
get
{
return fileExtension;
}
set
{

fileExtension = value;
}

}
private string fileExtension;
}

<?xml version=”1.0″ encoding=”gb2312″ ?>
<Application>
<FileUpLoad>
<Format>.jpg|.gif|.png|.bmp</Format>
</FileUpLoad>
</Application>

public FileUpLoad UpLoadFile(HtmlInputFile InputFile,string filePath,string myfileName,bool isRandom)
{

FileUpLoad fp = new FileUpLoad();

string fileName,fileExtension;
string saveName;

//
//建立上传对象
//
HttpPostedFile postedFile = InputFile.PostedFile;

fileName = System.IO.Path.GetFileName(postedFile.FileName);
fileExtension = System.IO.Path.GetExtension(fileName);

//
//根据类型确定文件格式
//
AppConfig app = new AppConfig();
string format = app.GetPath(“FileUpLoad/Format”);

//
//如果格式都不符合则返回
//
if(format.IndexOf(fileExtension)==-1)
{
throw new ApplicationException(“上传数据格式不合法”);
}

//
//根据日期和随机数生成随机的文件名
//
if(myfileName != string.Empty)
{
fileName = myfileName;
}

if(isRandom)
{
Random objRand = new Random();
System.DateTime date = DateTime.Now;
//生成随机文件名
saveName = date.Year.ToString() + date.Month.ToString() + date.Day.ToString() + date.Hour.ToString() + date.Minute.ToString()

+ date.Second.ToString() + Convert.ToString(objRand.Next(99)*97 + 100);
fileName = saveName + fileExtension;
}

string phyPath = HttpContext.Current.Request.MapPath(filePath);

//判断路径是否存在,若不存在则创建路径
DirectoryInfo upDir = new DirectoryInfo(phyPath);
if(!upDir.Exists)
{
upDir.Create();
}

//
//保存文件
//
try
{
postedFile.SaveAs(phyPath + fileName);

fp.FilePath = filePath + fileName;
fp.FileExtension = fileExtension;
fp.FileName = fileName;
}
catch
{
throw new ApplicationException(“上传失败!”);
}
//返回上传文件的信息
return fp;
}

public byte[] UpLoadFile(HtmlInputFile f_IFile)
{
//获取由客户端指定的上传文件的访问
HttpPostedFile upFile=f_IFile.PostedFile;
//得到上传文件的长度
int upFileLength=upFile.ContentLength;
//得到上传文件的客户端MIME类型
string contentType = upFile.ContentType;
byte[] FileArray=new Byte[upFileLength];

Stream fileStream=upFile.InputStream;

fileStream.Read(FileArray,0,upFileLength);

return FileArray;

}

<add verb=”*” path=”openfile.aspx” type=”RuixinOA.Web.BaseClass.OpenFile, RuixinOA.Web”/>

using System;
using System.Data;
using System.Web;
using System.IO;
using Ruixin.WorkFlowDB;
using RXSuite.Base;
using RXSuite.Component;
using RuixinOA.BusinessFacade;

namespace RuixinOA.Web.BaseClass
{
/**/
/// <summary>
/// NetUFile 的摘要说明。
/// </summary>
public class OpenFile : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{

//从数据库中取出要下载的文件信息
RuixinOA.BusinessFacade.RX_OA_FileManager os = new RX_OA_FileManager();
EntityData data = os.GetFileDetail(id);

if (data != null && data.Tables[“RX_OA_File”].Rows.Count > 0)
{
DataRow dr = (DataRow)data.Tables[“RX_OA_File”].Rows[0];

context.Response.Buffer = true;
context.Response.Clear();
context.Response.ContentType = dr[“CContentType”].ToString();
context.Response.AddHeader(“Content-Disposition”, “attachment;filename=” + HttpUtility.UrlEncode(dr[“CTitle”].ToString()));
context.Response.BinaryWrite((Byte[])dr[“CContent”]);
context.Response.Flush();
context.Response.End();
}

}

public bool IsReusable
{

get { return true; }
}
}
}