文件上传到服务器

using System;

usingSystem.Collections;

usingSystem.Configuration;

usingSystem.Data;

usingSystem.Linq;

usingSystem.Web;

usingSystem.Web.Security;

usingSystem.Web.UI;

usingSystem.Web.UI.HtmlControls;

usingSystem.Web.UI.WebControls;

usingSystem.Web.UI.WebControls.WebParts;

usingSystem.Xml.Linq;

using System.IO;

public partial class 上传文件代码: System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btu_Click(object sender, EventArgs e)

{

//上传图片分为两步第一步：将图片上传到服务器第二步：将路径保存到数据库

string path = ""; //创建路径

string filenewname = DateTime.Now.ToLongDateString() + DateTime.Now.Hour.ToString() + lisecond.ToString(); //文件名

if (this.fileupload.PostedFile.FileName.Length> 0)

{

intipos = stIndexOf("\\"); //记录最后一个\ 的位置

string filename = "";

if (ipos.ToString() != "-1")

{

filename =

this.fileupload.PostedFile.FileName.Substring(ipos);//获取文件名

}

else

{

filename = this.fileupload.PostedFile.FileName;

}

intiiii = stIndexOf(".");

string fileexpandname = filename.Substring(iiii); //获取扩展名fileexpandname = fileexpandname.ToLower();

if (fileexpandname == ".jpg" || fileexpandname == ".doc" || fileexpandname == ".gif")

{

string filefolder = "\\uploadfile\\news"; //构造文件夹名称

path = filefolder + "\\" + filenewname + fileexpandname;

DirectoryInfo dire = new DirectoryInfo(Server.MapPath(filefolder)); //创建文件夹(在本机上用就去掉Server.MapPath)

if (!dire.Exists)

{

dire.Create();

}

DirectoryInfodires = new DirectoryInfo(Server.MapPath(filefolder + "\\s_img")); //创建文件夹(在本机上用就去掉Server.MapPath)

if (!dires.Exists)

{

dires.Create();

}

}

this.fileupload.PostedFile.SaveAs(Server.MapPath(path)); //100*150(在本机上用就去掉Server.MapPath)

}

else

{

Response.Write("");

}

}

}

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.net字节流上传文件

///

/// WebClient上传文件至服务器（不带进度条）

///

/// 要上传的文件（全路径格式）

/// Web服务器文件夹路径

/// True/False是否上传成功

public boolUpLoadFile(string fileNameFullPath, string strUrlDirPath)

{

//得到要上传的文件文件名

string fileName = fileNameFullPath.Substring(stIndexOf("\\") + 1);

//新文件名由年月日时分秒及毫秒组成

string NewFileName = DateTime.Now.ToString("yyyyMMddhhmmss")

+ lisecond.ToString()

+ fileNameFullPath.Substring(stIndexOf("."));

//得到文件扩展名

string fileNameExt = fileName.Substring(stIndexOf(".") + 1);

if (strUrlDirPath.EndsWith("/") == false) strUrlDirPath = strUrlDirPath + "/";

if (Directory.Exists(Server.MapPath(strUrlDirPath)))

{

Directory.CreateDirectory(Server.MapPath(strUrlDirPath));

}

//保存在服务器上时，将文件改名（示业务需要）

strUrlDirPath = strUrlDirPath + NewFileName;

// 创建WebClient实例

WebClientmyWebClient = new WebClient();

myWebClient.Credentials = CredentialCache.DefaultCredentials;

// 将要上传的文件打开读进文件流

FileStreammyFileStream = new FileStream(fileNameFullPath, FileMode.Open, FileAccess.Read);

BinaryReadermyBinaryReader = new BinaryReader(myFileStream);

try

{

byte[] postArray = myBinaryReader.ReadBytes((int)myFileStream.Length);

//打开远程Web地址，将文件流写入

Stream postStream = myWebClient.OpenWrite(strUrlDirPath, "PUT");

if (postStream.CanWrite)

{

postStream.Write(postArray, 0, postArray.Length);

}

else

{

//MessageBox.Show("Web服务器文件目前不可写入，请检查Web服务器目录权限设置！","系统提示",MessageBoxButtons.OK,rmation);