2023年7月3日发(作者：)

C# WinForm 文件上传下载 收藏

/**//**//**////

/// WebClient上传文件至服务器

///

/// 文件名，全路径格式

/// 服务器文件夹路径

/// 是否需要修改文件名，这里默认是日期格式

///

public static bool UploadFile(string localFilePath, string serverFolder,bool reName)

......{

string fileNameExt, newFileName, uriString;

if (reName)

......{

fileNameExt = ing(dexOf(".") + 1);

newFileName = ng("yyMMddhhmmss") + fileNameExt;

}

else

......{

newFileName = ing(dexOf("")+1);

}

if (!th("/") && !th(""))

......{

serverFolder = serverFolder + "/";

}

uriString = serverFolder + newFileName; //服务器保存路径

/**//**//**//// 创建WebClient实例

WebClient myWebClient = new WebClient();

tials = tCredentials;

// 要上传的文件

FileStream fs = new FileStream(newFileName, , );

BinaryReader r = new BinaryReader(fs);

try

......{

//使用UploadFile方法可以用下面的格式

//File(uriString,"PUT",localFilePath);

byte[] postArray = tes((int));

Stream postStream = ite(uriString, "PUT");

if (te)

......{ (postArray, 0, );

}

else

......{

("文件目前不可写！");

}

();

}

catch

......{

//("文件上传失败，请稍候重试~");

return false;

}

return true;

}

/**//**//**////

/// 下载服务器文件至客户端

///

/// 被下载的文件地址

/// 另存放的目录

public static bool Download(string uri, string savePath)

......{

string fileName; //被下载的文件名

if (f("") > -1)

......{

fileName = ing(dexOf("") + 1);

}

else

......{

fileName = ing(dexOf("/") + 1);

}

if (!th("/") && !th(""))

......{

savePath = savePath + "/";

}

savePath += fileName; //另存为的绝对路径＋文件名

WebClient client = new WebClient(); try

......{

adFile(uri, savePath);

}

catch

......{

return false;

}

return true;

}

************************************************

命名空间

;

;

上传IIS虚拟目录需要给写入权限，下载可能需要匿名访问权限。

本文来自CSDN博客，转载请标明出处：/wxg22526451/archive/2008/03/24/

字号：大 中 小

using System;

using ;

using ;

namespace leo

{

///

/// 文件上传类

/// 作者：leo

/// 制作时间：2006-2-13 最后修改于2007-6-25

///

public class UploadFile

{

public UploadFile(HttpPostedFile PostedFile)

{

FileObj = PostedFile;

}

private HttpPostedFile FileObj;

private int maxSize = 150 * 1024;

private string filesType = ".jpeg|.jpg|.gif";

private bool oldFileName = false;

private string filesPath = "";

private string Eror = "";

private int errorNum = 0;

private string savaFileName = "";

//属性区

public int MaxSizeKB

{

get{ return maxSize / 1024; }

set{ maxSize = value * 1024;}

}

public string FilesType

{

get{ return filesType; }

//默认150KB

//默认文件类型

//是否采用原文件名

//设置文件夹路径

//错误信息

//错误码

//上传成功后的文件名称

set{ filesType = r();}

}

public string FilesPath

{

get{ return filesPath; }

set{ filesPath = value;}

}

public string SavaFileName

{

get{ return savaFileName; }

set{ savaFileName = value;}

}

public string SaveEror

{

get{ return Eror; }

}

public int ErrorNum

{

get { return errorNum; }

}

public bool OldFileName

{

get{ return oldFileName; } set{ oldFileName = value;}

}

//方法区

private string GetNewFileName(string FlieExtension)

{

Random rd = new Random();

int rnum = (100, 999);

string dt = ng("yyyyMMddhhmmss");

return dt + ng() + FlieExtension;

}

public bool SaveFile()

{

if (FileObj != null)

{

try

{

string strFileURLName = me;

//上传文件原URL

string strFileName = eName(strFileURLName); //上传文件原名

string strFlieExtension = ension(strFileURLName).ToLower(); //上传文件原扩展名

if (tLength == 0)

{

Eror = "您上传的文件为空";

errorNum = 2;

return false;

}

if (tLength > maxSize)

{

Eror = "上传文件超过限定大小";

errorNum = 3;

return false;

}

string[] fType = ('|');

bool ok = false;

for (int i = 0; i < ; i++)

{

if (fType[i] == strFlieExtension)

ok = true;

}

if (!ok)

{

Eror = "上传文件类型不是程序允许的类型"; errorNum = 4;

return false;

}

if(!(filesPath))

{

Eror = "文件存储的目录不存在";

errorNum = 5;

return false;

}

string NewFileName;

if (!oldFileName)

{

NewFileName = GetNewFileName(strFlieExtension);

}

else

NewFileName = strFileName;

try

{

(e(filesPath,NewFileName));

} catch

{

Eror = "存储文件时发生错误，可能是该目录没有权限";

errorNum = 6;

return false;

}

savaFileName = NewFileName;

Eror = "";

errorNum = 0;

return true;

}

catch(Exception e)

{

Eror = ng();

errorNum = 9;

return false;

}

}

else

{

Eror = "没有文件被上传";

errorNum = 1; return false;

}

}

}

}

C# WinForm 文件上传下载 (附源码)

**////

/// WebClient上传文件至服务器

///

/// 文件名，全路径格式

/// 服务器文件夹路径

private void UpLoadFile(string fileNamePath,string uriString)

{

//string fileName = ing(dexOf("") + 1);

NewFileName = ng("yyMMddhhmmss")

ng()

ing(dexOf("."));

string fileNameExt = ing(dexOf(".") + 1);

if(th("/") == false) uriString = uriString + "/";

uriString = uriString + NewFileName;

/**//// 创建WebClient实例

WebClient myWebClient = new WebClient();

tials = tCredentials;

// 要上传的文件

FileStream fs = new FileStream(fileNamePath, , );

//FileStream fs = OpenFile();

BinaryReader r = new BinaryReader(fs);

try

{

//使用UploadFile方法可以用下面的格式

//File(uriString,"PUT",fileNamePath);

byte[] postArray = tes((int));

+

+ Stream postStream = ite(uriString,"PUT");

if(te)

{

(postArray,0,);

}

else

{

("文件目前不可写！");

}

();

}

catch

{

("文件上传失败，请稍候重试~");

}

}

/**////

/// 下载服务器文件至客户端

///

/// 被下载的文件地址，绝对路径

/// 另存放的目录

public void Download(string URL,string Dir)

{

WebClient client = new WebClient();

string fileName = ing(dexOf("") + 1); //被下载的文件名

string Path = Dir+fileName; //另存为的绝对路径＋文件名

try

{

WebRequest myre=(URL);

}

catch

{

//(e,"Error");

}

try

{

adFile(URL,Path);

}

catch

{

//(e,"Error");

}

}

/*---------------------------------------------

* 黑白之间

* gxian22@

* 最后修改日期：2008年9月9日21:39:41

*UploadFile ufud = new UploadFile();

*

* ze = 250;

* 默认为 200KB 如要上传大于6兆以上图片要在 配置<>

executionTimeout="60"/>

*

*FileList = "/UploadFiles"; //默认为 UploadFile 文件夹

*

*--------不压缩则不设置---------

*=1 //1为缩略图

*th = 250;//缩略尺寸

*th = 250;//缩略尺寸

*-------------------------------

*eFileNameMode = 2;//更改上传文件名字有三种(0 原始的 不更改 ,1 全局唯一标识型,2 时间 ) 默认全局唯一标识型 类型

*ploadExtension = ".gif,.jpg,.png,.html";

*loads(File);// Fil(上传控件名称).PostedFile

*

* *(dAndError)//返回成功或错误文字信息

*(ode) //返回成功或错误代码 0成功 1文件太大 2文件太小 3格式不正确 4其他错误

*(FilePath) //返回上传文件路径

---------------------------------------------*/

using System;

using ;

using g;

namespace Common

{

///

/// 支持上传缩略图、更改图片名、自定义上传文件格式和文件大小。

///

public class UploadFile

{

private string uploadfilelist = "UploadFile";

private int userid = 0;

private int filesize = 200;//200K

private string filesuploadextension = ".gif,.jpg,.png";

private string returnfilepath = "--";

private string succeedanderror = null;

private int errorcode = 0;

private int rewritefilenamemode = 1;

private int imgheight = 120, imgwidth = 120;

private int reduce = 0;

///

/// 上传图片默认原始大小，1为缩略图同时你要设置缩略 宽：ImgWidth=？，高：

ImgHidth=？

///

public int Reduce

{

get { return reduce; }

set { reduce = value; }

}

///

/// 图片缩略宽度大小 默认 120

///

public int ImgWidth

{ get { return imgwidth; }

set { imgwidth = value; }

}

///

/// 图片缩略高大小 默认 120

///

public int ImgHidth

{

get { return imgheight; }

set { imgheight = value; }

}

///

/// 上传文件存放目录

///

public string UploadFileList

{

get { return uploadfilelist; }

set { uploadfilelist = value; }

}

///

/// 更改上传文件名字有三种(0 原始的 不更改 ,1 全局唯一标识型,2 时间 ) 默认全局唯一标识型 类型

///

public int RewriteFileNameMode

{

get { return rewritefilenamemode; }

set { rewritefilenamemode = value; }

}

///

/// 上传用户ID

///

public int UserID

{

get { return userid; }

set { userid = value; }

}

///

/// 文件上传大小 默认为200K

///

public int FileSize

{

get { return filesize; }

set { filesize = value; }

}

///

/// 设置允许上传文件类型， 默认为(.gif,.jpg,.txt)

///

public string FilesUploadExtension

{

get { return filesuploadextension; }

set { filesuploadextension = value; }

}

///

/// 返回上传文件路径

///

public string ReturnFilePath

{

get { return returnfilepath; }

set { returnfilepath = value; }

}

///

/// 成功 或 错误信息

///

public string SucceedAndError

{

get { return succeedanderror; }

set { succeedanderror = value; }

}

///

/// 返回错误编号 0成功 1文件太大 2文件太小 3格式不正确 4其他错误

///

public int ErrorCode

{

get { return errorcode; }

set { errorcode = value; }

}

///

/// 上传文件

///

/// 上传控件名称

public void FileUploads(stedFile HttpPflie)

{

oriImg;//, newImg;

int ImageHeight, ImageWidth;

string strFileExt =

ension(me).ToString().ToLower(); //提取上传文件

扩展名。

if ("".Equals(strFileExt))

{

SucceedAndError = ("不能上传的文件,允许上传格式({0})", FilesUploadExtension);

ErrorCode = 3;

ReturnFilePath = "--";

return;

}

int ifcheck = f(r()); //是否为允许上传的格式

if (ifcheck < 0)

{

SucceedAndError = ("不能上传的文件,允许上传格式{0}", FilesUploadExtension);

ErrorCode = 3;

ReturnFilePath = "--";

return;

}

int FileUploadSize = FilSize(tLength); //上传文件大小

if (FileUploadSize <= 0)

{

SucceedAndError = "文件不得小于0KB";

ErrorCode = 2;

ReturnFilePath = "--";

return;

}

if (FileUploadSize >= FileSize)

{ SucceedAndError = ("文件不得大于{0},您超过了{1}",

KBStr(FileSize),

KBStr(FileUploadSize - FileSize));

ErrorCode = 1;

ReturnFilePath = "--";

return;

}

if (ifcheck >= 0 && FileUploadSize > 0 && FileUploadSize < FileSize)

{

string NewFileName = null, filelist = null;

//生成文件名

try

{

#region ----------生成上传文件名----------

switch (RewriteFileNameMode)

{

case 2://时间型文件名

DateTime date = ;

string FileName

ng("MM") + ng

= ng("yyyy") +

("dd");

FileName += ng("HH") + ng("mm")

+ ng("ss");

Random rnd = new Random();

double rndNum = uble() * 10000;

NewFileName =

ng().Substring(0, ng().LastIndexOf(".")) +

strFileExt; //生成新的文件名

break;

case 1:

NewFileName

strFileExt;

break;

case 0:

NewFileName

ing(dexOf("/") > -1 ?

=

= d().ToString("b") +

FileName + dexOf("/") : dexOf("")).Replace("/",

"").Replace("", "");

break;

}

#endregion

//创建文件夹 将上传的文件按月分开存放。

string datafile

Time().ToString("yyyy") + "-" + Time

().ToString("MM");

filelist

e(".", "") + "/";

string

h(filelist);

path =

= UploadFileList + "/" + datafile + "/" +

=

if (!(path))

Directory(path);//生成文件保存目录

#region ----------生成缩略图并上传----------

if (Reduce == 1

('/')[0].Equals("image"))//tType是否为

图片文件

{

oriImg

ream(tream);

if ( / >= ImgWidth / ImgHidth)

{

if ( > ImgHidth)

{

ImageWidth = ImgWidth;

ImageHeight = 32( *

ImgWidth) / ;

}

else

{

ImageWidth = ;

=

&& ImageHeight = ;

}

}

else

{

if ( > ImgWidth)

{

ImageWidth = 32( *

ImgHidth) / ;

ImageHeight = ImgHidth;

}

else

{

ImageWidth = ;

ImageHeight = ;

}

}

//----------------------高质量---------------------

Bitmap newImg = new Bitmap(ImageWidth, ImageHeight);

//以缩略图的宽高

创建位图对象

Graphics

//创建Graphics对

象，用于缩略图的图像的绘制

olationMode

; //获取或设置与此

Graphics 对象关联的插补模式。指定高质量插值法。

ingMode

ality; //指定高质量、低

速度呈现。

=

=

g = age(newImg);

(arent);

//清除整个绘图面

并以透明色填充。

age(ream(tream), new Rectangle(0, 0,

ImageWidth, ImageHeight), new Rectangle(0, 0, , ), );//缩略图绘制

// newImg =

ImageHeight, null, new (0)); //低质

量

switch (strFileExt)

{

case ".jpg": (path + "/" + NewFileName,

);

break;

case ".gif": (path + "/" + NewFileName,

);

break;

case ".png": (path + "/" + NewFileName,

);

break;

default: (path + "/" + NewFileName,

);

break;

}

e();

e();

}

#endregion

#region ----------原始尺寸图片上传----------

if (!('/')[0].Equals("image") || Reduce ==

0)

{

path = path + "/" + NewFileName;

(path);

}

#endregion

SucceedAndError = "文件上传成功";

mbnailImage(ImageWidth, ErrorCode = 0;

ReturnFilePath = filelist + NewFileName;

}

catch (Exception e){

SucceedAndError = e;

ErrorCode = 4;

}

finally{

//break;

}

}

}

private static int FilSize(int imgSize)

{

return ((imgSize / 1024) * 100) / 100;

}

}

}