Asp.net(c#)实现多线程断点续传
来源:互联网 发布:软件项目管理阶段 编辑:程序博客网 时间:2024/05/21 08:37
以前一直错误的认为在ASP.NET中无法通过编程方式实现多线程断点续传,今天终于获得了这样一个解决方案,让我明白要学习的东西还很多。
此解决方案基于其它解决方案及相关资料,根据我自己的理解改进.如有错漏,请尽管指出;如有其它更好的解决方案,请推荐一下,感谢先。
此解决方案基于其它解决方案及相关资料,根据我自己的理解改进.如有错漏,请尽管指出;如有其它更好的解决方案,请推荐一下,感谢先。
System.IO.Stream iStream = null;
// Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10240];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = @"E:/software/SQL Server 2000 Personal Edition.ISO";
// Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
System.IO.FileAccess.Read,System.IO.FileShare.Read);
Response.Clear();
// Total bytes to read:
dataToRead = iStream.Length;
long p = 0;
if(Request.Headers["Range"]!=null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
if(p != 0)
{
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
}
Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));
iStream.Position = p;
dataToRead = dataToRead - p;
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = iStream.Read(buffer, 0, 10240);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer= new Byte[10240];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write("Error : " + ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close();
}
Response.End();
}
// Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10240];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = @"E:/software/SQL Server 2000 Personal Edition.ISO";
// Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
System.IO.FileAccess.Read,System.IO.FileShare.Read);
Response.Clear();
// Total bytes to read:
dataToRead = iStream.Length;
long p = 0;
if(Request.Headers["Range"]!=null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
if(p != 0)
{
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
}
Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));
iStream.Position = p;
dataToRead = dataToRead - p;
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = iStream.Read(buffer, 0, 10240);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer= new Byte[10240];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write("Error : " + ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close();
}
Response.End();
}
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)二进制上传 and 实现多线程断点续传
- Asp.net(c#)二进制上传 and 实现多线程断点续传
- Asp.net(c#)实现多线程断点续传下载大文件
- Net/C#: 实现支持断点续传多线程下载2
- 使文件下载的自定义连接支持 FlashGet 的断点续传多线程链接下载! C#/ASP.Net 实现!
- 用java实现3种基本的排序算法
- C#中的多线程编程
- C#的多线程机制
- SQL Server 使用备份还原造成孤立用户的解决(补充)
- C#下用P2P技术实现点对点聊天
- Asp.net(c#)实现多线程断点续传
- C++ Builder格式化字符串
- 03-29/小心QQ信息中的网址传播Trojan-PSW.Win32.Delf.qc/Trojan.PSW.Liumazi.kr(2版)
- 生成静态文件的新闻系统核心代码
- XML中DOM解析问题:Msxml2.DOMDocument.4.0 报错
- 架构师要了解那些??
- 设计模式之C#实现--AbstractFactory
- 考研日志-11
- 设计模式C#描述之——简单工厂模式