C# 从服务器下载代码.docx

C# 从服务器下载文件代码一、/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 byteChunkSize;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.ReadAllBytes(FilePath);/-WebForm.Response.End(); 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 byteChunkSize;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.ContentT