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WinFrom通过WebClient上传下载文件

2022-06-15 来源:知库网


以下程序在.NET2005,系统XP中测试通过:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Net;

using System.IO;

namespace TQSystem.Com

{

class UpDownLoadFile

{

///

/// 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 bool UpLoadFile(string fileNameFullPath, string strUrlDirPath)

{

//得到要上传的文件文件名

string fileName =

fileNameFullPath.Substring(fileNameFullPath.LastIndexOf(\"\\\\\") + 1);

//新文件名由年月日时分秒及毫秒组成

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

+ DateTime.Now.Millisecond.ToString()

+

fileNameFullPath.Substring(fileNameFullPath.LastIndexOf(\".\"));

//得到文件扩展名

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

if (strUrlDirPath.EndsWith(\"/\") == false) strUrlDirPath = 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

WebClient myWebClient = new WebClient();

myWebClient.Credentials = CredentialCache.DefaultCredentials;

// 将要上传的文件打开读进文件流

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

BinaryReader myBinaryReader = 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

\

}

postStream.Close();//关闭流

return true;

}

catch (Exception exp)

{

//MessageBox.Show(\"文件上传失败:\" + exp.Message, \"系统提示\MessageBoxButtons.OK, MessageBoxIcon.Information);

return false;

}

}

///

/// 下载服务器文件至客户端(不带进度条)

///

/// 要下载的Web服务器上的文件地址(全路径 如:http://www.dzbsoft.com/test.rar)

/// 下载到的目录(存放位置,机地机器文件夹)

/// True/False是否上传成功

public bool DownLoadFile(string strUrlFilePath, string strLocalDirPath)

{

// 创建WebClient实例

WebClient client = new WebClient();

//被下载的文件名

string fileName =

strUrlFilePath.Substring(strUrlFilePath.LastIndexOf(\"/\"));

//另存为的绝对路径+文件名

string Path = strLocalDirPath + fileName;

try

{

WebRequest myWebRequest = WebRequest.Create(strUrlFilePath);

}

catch (Exception exp)

{

MessageBox.Show(\"文件下载失败:\" + exp.Message, \"系统提示\MessageBoxButtons.OK, MessageBoxIcon.Information);

}

try

{

client.DownloadFile(strUrlFilePath, Path);

return true;

}

catch (Exception exp)

{

MessageBox.Show(\"文件下载失败:\" + exp.Message, \"系统提示\MessageBoxButtons.OK, MessageBoxIcon.Information);

return false;

}

}

///

/// 下载带进度条代码(普通进度条)

///

/// 网址

/// 文件名

/// 普通进度条ProgressBar

/// True/False是否下载成功

public bool DownLoadFile(string URL, string Filename, ProgressBar Prog)

{

try

{

System.Net.HttpWebRequest Myrq =

(System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求

System.Net.HttpWebResponse myrp =

(System.Net.HttpWebResponse)Myrq.GetResponse(); //从WEB请求得到WEB响应

long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数

Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值

System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流(读)

System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流(写)

long totalDownloadedByte = 0; //下载文件大小

byte[] by = new byte[1024];

int osize = st.Read(by, 0, (int)by.Length); //读流

while (osize > 0)

{

totalDownloadedByte = osize + totalDownloadedByte; //小

osize = st.Read(by, 0, (int)by.Length); // }

更新文件大Application.DoEvents();

so.Write(by, 0, osize); //写流

Prog.Value = (int)totalDownloadedByte; //更新进度条

读流

}

so.Close(); //关闭流

st.Close(); //关闭流

return true;

catch

{

return false;

}

}

///

/// 下载带进度条代码(状态栏式进度条)

///

/// 网址

/// 文件名

/// 状态栏式进度条ToolStripProgressBar

/// True/False是否下载成功

public bool DownLoadFile(string URL, string Filename, ToolStripProgressBar Prog)

{

try

{

System.Net.HttpWebRequest Myrq =

(System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求

System.Net.HttpWebResponse myrp =

(System.Net.HttpWebResponse)Myrq.GetResponse(); //从WEB请求得到WEB响应

long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数

Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值

System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流(读)

System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流(写)

long totalDownloadedByte = 0; //下载文件大小

byte[] by = new byte[1024];

int osize = st.Read(by, 0, (int)by.Length); //读流

while (osize > 0)

{

}

totalDownloadedByte = osize + totalDownloadedByte; //更新文件大Application.DoEvents();

so.Write(by, 0, osize); //写流

Prog.Value = (int)totalDownloadedByte; //更新进度条

osize = st.Read(by, 0, (int)by.Length); //读流

}

so.Close(); //关闭流

st.Close(); //关闭流

return true;

catch

{

return false;

}

}

}

}

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