/// <summary>
/// 下载服务器文件至客户端(不带进度条)
/// </summary>
/// <param name="strUrlFilePath">要下载的Web服务器上的文件地址(全路径 如:http://www.dzbsoft.com/test.rar)</param>
/// <param name="Dir">下载到的目录(存放位置,机地机器文件夹)</param>
/// <returns>True/False是否上传成功</returns>
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;
}
}
/// <summary>
/// 下载带进度条代码(普通进度条)
/// </summary>
/// <param name="URL">网址</param>
/// <param name="Filename">文件名</param>
/// <param name="Prog">普通进度条ProgressBar</param>
/// <returns>True/False是否下载成功</returns>
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; //更新文件大小
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;
}
}
/// <summary>
/// 下载带进度条代码(状态栏式进度条)
/// </summary>
/// <param name="URL">网址</param>
/// <param name="Filename">文件名</param>
/// <param name="Prog">状态栏式进度条ToolStripProgressBar</param>
/// <returns>True/False是否下载成功</returns>
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; //更新文件大小
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;
}
}
public void startProcess(string fileName)
{
//定义一个ProcessStartInfo实例
System.Diagnostics.ProcessStartInfo info = new System.Diagnostics.ProcessStartInfo();
//设置启动进程的初始目录
info.WorkingDirectory = Application.StartupPath;
//设置启动进程的应用程序或文档名
info.FileName = @fileName;
//设置启动进程的参数
info.Arguments = "";
//启动由包含进程启动信息的进程资源
try
{
System.Diagnostics.Process.Start(info);
}
catch (System.ComponentModel.Win32Exception we)
{
MessageBox.Show(this, we.Message);
return;
}
}
一、
//
TransmitFile实现下载
protected
void
Button1_Click(
object
sender, EventArgs e)
{
/*
微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite
下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。
代码如下:
*/
Response.ContentType
=
"
application/x-zip-compressed
"
;
Response.AddHeader(
"
Content-Disposition
"
,
"
attachment;filename=z.zip
"
);
string
filename
=
Server.MapPath(
"
DownLoad/z.zip
"
);
Response.TransmitFile(filename);
}
二、
//
WriteFile实现下载
protected
void
Button2_Click(
object
sender, EventArgs e)
{
/*
using System.IO;
*/
string
fileName
=
"
asd.txt
"
;
//
客户端保存的文件名
string
filePath
=
Server.MapPath(
"
DownLoad/aaa.txt
"
);
//
路径
FileInfo fileInfo
=
new
FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader(
"
Content-Disposition
"
,
"
attachment;filename=
"
+
fileName);
Response.AddHeader(
"
Content-Length
"
, fileInfo.Length.ToString());
Response.AddHeader(
"
Content-Transfer-Encoding
"
,
"
binary
"
);
Response.ContentType
=
"
application/octet-stream
"
;
Response.ContentEncoding
=
System.Text.Encoding.GetEncoding(
"
gb2312
"
);
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
}
三、
//
WriteFile分块下载
protected
void
Button3_Click(
object
sender, EventArgs e)
{
string
fileName
=
"
aaa.txt
"
;
//
客户端保存的文件名
string
filePath
=
Server.MapPath(
"
DownLoad/aaa.txt
"
);
//
路径
System.IO.FileInfo fileInfo
=
new
System.IO.FileInfo(filePath);
if
(fileInfo.Exists
==
true
)
{
const
long
ChunkSize
=
102400
;
//
100K 每次读取文件,只读取100K,这样可以缓解服务器的压力
byte
[] buffer
=
new
byte
[ChunkSize];
Response.Clear();
System.IO.FileStream iStream
=
System.IO.File.OpenRead(filePath);
long
dataLengthToRead
=
iStream.Length;
//
获取下载的文件总大小
Response.ContentType
=
"
application/octet-stream
"
;
Response.AddHeader(
"
Content-Disposition
"
,
"
attachment; filename=
"
+
HttpUtility.UrlEncode(fileName));
while
(dataLengthToRead
>
0
&&
Response.IsClientConnected)
{
int
lengthRead
=
iStream.Read(buffer,
0
, Convert.ToInt32(ChunkSize));
//
读取的大小
Response.OutputStream.Write(buffer,
0
, lengthRead);
Response.Flush();
dataLengthToRead
=
dataLengthToRead
-
lengthRead;
}
Response.Close();
}
}
四、
//
流方式下载
protected
void
Button4_Click(
object
sender, EventArgs e)
{
string
fileName
=
"
aaa.txt
"
;
//
客户端保存的文件名
string
filePath
=
Server.MapPath(
"
DownLoad/aaa.txt
"
);
//
路径
//
以字符流的形式下载文件
FileStream fs
=
new
FileStream(filePath, FileMode.Open);
byte
[] bytes
=
new
byte
[(
int
)fs.Length];
fs.Read(bytes,
0
, bytes.Length);
fs.Close();
Response.ContentType
=
"
application/octet-stream
"
;
//
通知浏览器下载文件而不是打开
Response.AddHeader(
"
Content-Disposition
"
,
"
attachment; filename=
"
+
HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
//
----------------------------------------------------------
public
void
DownloadFile( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FileBody )
{
WebForm.Response.ClearHeaders();
WebForm.Response.Clear();
WebForm.Response.Expires
=
0
;
WebForm.Response.Buffer
=
true
;
WebForm.Response.AddHeader(
"
Accept-Language
"
,
"
zh-tw
"
);
//
'文件名称
WebForm.Response.AddHeader(
"
content-disposition
"
,
"
attachment; filename='
"
+
System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8)
+
"
'
"
);
WebForm.Response.ContentType
=
"
Application/octet-stream
"
;
//
'文件内容
WebForm.Response.Write(FileBody);
//
-----------
WebForm.Response.End();
}
//
上面这段代码是下载一个动态产生的文本文件,若这个文件已经存在于服务器端的实体路径,则可以通过下面的函数:
public
void
DownloadFileByFilePath( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FilePath )
{
WebForm.Response.ClearHeaders();
WebForm.Response.Clear();
WebForm.Response.Expires
=
0
;
WebForm.Response.Buffer
=
true
;
WebForm.Response.AddHeader(
"
Accept-Language
"
,
"
zh-tw
"
);
//
文件名称
WebForm.Response.AddHeader(
"
content-disposition
"
,
"
attachment; filename='
"
+
System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8)
+
"
'
"
);
WebForm.Response.ContentType
=
"
Application/octet-stream
"
;
//
文件内容
WebForm.Response.Write(System.IO.File.Rea}dAllBytes(FilePath));
//
---------
WebForm.Response.End();
}