（转）C# 通用上传文件类

（转自）http://www.cnblogs.com/top5/archive/2009/12/31/1637195.html

1、Upfile.aspx：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Upfile.aspx.cs" Inherits="Inc_Upfile" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml"; >
<head runat="server">
<title>上传文件</title>
<link href="../Manage/Style.Css" type="text/css" rel=Stylesheet />
</head>
<body>
<form id="form1" runat="server">
<div style="left: 0px; clip: rect(0px auto auto 0px); position: absolute; top: 0px">
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传文件" CssClass="btn2" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></div>
</form>
</body>
</html>

Upfile.aspx.cs

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

public partial class Inc_Upfile : System.Web.UI.Page
...{
protected void Page_Load(object sender, EventArgs e)
...{
//Cut By 梦溪苑。
}
protected void Button1_Click(object sender, EventArgs e)
...{
AllSheng.upload UpFiles = new AllSheng.upload();

//HttpPostedFile File = FileUpload1.PostedFile;
// AllSheng.UploadObj.PhotoSave("/", FileUpload1);
HttpFileCollection files = HttpContext.Current.Request.Files;
UpFiles.Path = "../UpLoadfiles";
String ReStr= UpFiles.SaveAs(files).ToString();
Label1.Text = ReStr;
UpFiles = null;
}

3、类文件：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/**//// <summary>
/// Cls_Upfile 的摘要说明
/// </summary>
///
namespace AllSheng
...{
public class upload
...{
变量#region 变量

System.Web.HttpPostedFile postedFile;

protected string localFileName;//原文件名(含扩展名)
protected string localFileExtension;//原扩展名
protected long localFileLength;//原文件大小
protected string localFilePath;//原文件路径

protected string saveFileName;//保存的文件名(含扩展名)
protected string saveFileExtension;//保存的扩展名
//protected long saveFileLength;//保存的文件大小
protected string saveFilePath;//保存文件的服务器端的完整路径
protected string saveFileFolderPath;//保存文件的服务器端的文件夹路径

private string path = null;
private string fileType = null;
private int sizes = 0;

#endregion

upload():初始化变量#region upload():初始化变量
/**//// <summary>
/// 初始化变量
/// </summary>
public upload()
...{
path = @"uploadimages"; //上传路径
fileType = "jpg|gif|bmp|jpeg|png|rar|doc";
sizes = 200; //传文件的大小,默认200KB
}
#endregion

设置传入的值:Path/Sizes/FileType#region 设置传入的值:Path/Sizes/FileType
/**//// <summary>
/// 设置上传路径,如:uploadimages
/// </summary>
public string Path
...{
set
...{
path = @"" + value + @"";
}
}

/**//// <summary>
/// 设置上传文件大小,单位为KB
/// </summary>
public int Sizes
...{
set
...{
sizes = value;
}
}

/**//// <summary>
/// 设置上传文件的类型,如:jpg|gif|bmp
/// </summary>
public string FileType
...{
set
...{
fileType = value;
}
}
#endregion

SaveAs()上传文件#region SaveAs()上传文件

public string SaveAs(System.Web.HttpFileCollection files)
...{
string myReturn = "";
try
...{
for (int iFile = 0; iFile < files.Count; iFile++)
...{
postedFile = files[iFile];
//获得文件的上传的路径
localFilePath = postedFile.FileName;
//判断上传文件路径是否为空
if (localFilePath == null || localFilePath == "")
...{
//message("您没有上传数据呀，是不是搞错了呀!");
//break;

continue;
}
else
...{
判断文件大小#region 判断文件大小
//获得上传文件的大小
localFileLength = postedFile.ContentLength;
//判断上传文件大小
if (localFileLength >= sizes * 1024)
...{
message("上传的图片不能大于" + sizes + "KB");
break;
}
#endregion

文件夹#region 文件夹
//获取保存文件夹路径
saveFileFolderPath = getSaveFileFolderPath(path);
#endregion

文件名#region 文件名
//获得原文件名（含扩展名）
localFileName = System.IO.Path.GetFileName(postedFile.FileName);

saveFileName = DateTime.UtcNow.ToString("yyyy" + "MM" + "dd" + "HH" + "mm" + "ss" + "ffffff");//"yyyy"+"MM"+"dd"+"HH"+"mm"+"ss"+"ffffff"
#endregion

扩展名#region 扩展名
//获取原文件扩展名
localFileExtension = getFileExtension(localFileName);

//如果为真允许上传,为假则不允许上传
if (localFileExtension == "")
...{
message("目前本系统支持的格式为:" + fileType);
}
//得到保存文件的扩展名,可根据需要更改扩展名
saveFileExtension = localFileExtension;
#endregion

//得到保存文件的完整路径
saveFilePath = saveFileFolderPath + saveFileName + saveFileExtension;
postedFile.SaveAs(saveFilePath);
myReturn = myReturn + ((myReturn == "" || myReturn == null) ? "" : "|") + path.TrimStart(new char[] ...{ '' }) + saveFileName + saveFileExtension;
//以下对文章的内容进行一些加工

System.Web.HttpContext.Current.Response.Write("<script>parent.Article_Content___Frame.FCK.EditorDocument.body.innerHTML+='<img src=" + saveFileName + saveFileExtension + " "+" border=0 />'</SCRIPT>");

}
}
}
catch
...{
//异常
message("出现未知错误！");
myReturn = null;
}
return myReturn;
}
#endregion

getSaveFileFolderPath(...):获得保存的文件夹的物理路径#region getSaveFileFolderPath(...):获得保存的文件夹的物理路径
/**//// <summary>
/// 获得保存的文件夹的物理路径
/// 返回保存的文件夹的物理路径,若为null则表示出错
/// </summary>
/// <param name="format">保存的文件夹路径或者格式化方式创建保存文件的文件夹，如按日期"yyyy"+"MM"+"dd":20060511</param>
/// <returns>保存的文件夹的物理路径,若为null则表示出错</returns>
private string getSaveFileFolderPath(string format)
...{
string mySaveFolder = null;
try
...{
string folderPath = null;
//以当前时间创建文件夹,
//!!!!!!!!!!!!以后用正则表达式替换下面的验证语句!!!!!!!!!!!!!!!!!!!
if (format.IndexOf("yyyy") > -1 || format.IndexOf("MM") > -1 || format.IndexOf("dd") > -1 || format.IndexOf("hh") > -1 || format.IndexOf("mm") > -1 || format.IndexOf("ss") > -1 || format.IndexOf("ff") > -1)
...{
//以通用标准时间创建文件夹的名字
folderPath = DateTime.UtcNow.ToString(format);
mySaveFolder = System.Web.HttpContext.Current.Server.MapPath(".") + @"" + folderPath + @"";
}
else
...{
mySaveFolder = System.Web.HttpContext.Current.Server.MapPath(".") + format;
}
System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(mySaveFolder);
//判断文件夹否存在,不存在则创建
if (!dir.Exists)
...{
dir.Create();
}
}
catch
...{
message("获取保存路径出错");
}
return mySaveFolder;
}

#endregion

getFileExtension(...):获取原文件的扩展名#region getFileExtension(...):获取原文件的扩展名
/**//// <summary>
/// 获取原文件的扩展名,返回原文件的扩展名(localFileExtension),该函数用到外部变量fileType,即允许的文件扩展名.
/// </summary>
/// <param name="myFileName">原文件名</param>
/// <returns>原文件的扩展名(localFileExtension);若返回为null,表明文件无后缀名;若返回为"",则表明扩展名为非法.</returns>
private string getFileExtension(string myFileName)
...{
string myFileExtension = null;
//获得文件扩展名
myFileExtension = System.IO.Path.GetExtension(myFileName);//若为null,表明文件无后缀名;
//分解允许上传文件的格式
if (myFileExtension != "")
...{myFileExtension = myFileExtension.ToLower();//转化为小写
}
string[] temp = fileType.Split('|');
//设置上传的文件是否是允许的格式
bool flag = false;
//判断上传的文件是否是允许的格式
foreach (string data in temp)
...{
if (("." + data) == myFileExtension)
...{
flag = true;
break;
}
}
if (!flag)
...{
myFileExtension = "";//不能设置成null,因为null表明文件无后缀名;
}
return myFileExtension;
}
#endregion

message(...):弹出消息框#region message(...):弹出消息框
/**//// <summary>
/// 弹出消息框,显示内容(msg),点击"确定"后页面跳转到该路径(url)
/// </summary>
/// <param name="msg">显示内容</param>
/// <param name="url">跳转路径</param>
private void message(string msg, string url)
...{
System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('" + msg + "');window.location='" + url + "'</script>");
}

/**//// <summary>
/// 弹出消息框,显示内容(msg),无跳转
/// </summary>
/// <param name="msg">显示内容</param>
private void message(string msg)
...{
System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('" + msg + "');</script>");
}
#endregion
}
}