服务器的HTTP下载是怎么制作的 散分

Question

用aspx读取文件输出它
string strFile = "e:\\test.doc";
FileStream fs = new FileStream(strFile, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" & strFile);
Response.BinaryWrite(bytes);
Response.End();

Answer 1

Dim name As String = "中文名称"
            Response.ContentType = "application/ms-word"
            Response.Charset = "UTF-8"
            Response.AddHeader("content-disposition", "attachment; filename= " & HttpUtility.UrlEncode(name) & ".doc")            Dim sourceFile As IO.FileStream = New IO.FileStream("F:\downloadexample.doc", IO.FileMode.Open)
            Dim FileSize As Long
            FileSize = sourceFile.Length
            Dim getContent() As Byte = New Byte(FileSize) {}            sourceFile.Read(getContent, 0, sourceFile.Length)
            Response.BinaryWrite(getContent)
            sourceFile.Close()

Answer 2

给你一段VB的程序，自己转化为C#的
 Dim fs As FileStream = File.OpenRead(Server.MapPath(filepath.ToString())
Dim data(fs.Length) As Byte
fs.Read(data, 0, CInt(fs.Length))
 Dim ext = path.GetExtension(fullpath)
            Dim type As String = ""
            If Not IsDBNull(ext) Then
                ext = LCase(ext)
            End If
            Select Case ext
                Case ".htm", ".html"
                    type = "text/HTML"
                Case ".txt"
                    type = "text/plain"
                Case ".doc", ".rtf"
                    type = "Application/msword"
                Case ".csv", ".xls"
                    type = "Application/x-msexcel"
                Case ".zip", ".msi", ".exe"
                    type = "Application"
                Case Else
                    type = "Application/octet-stream"
            End Select
  Response.Buffer = True
            Response.Clear()
            If type <> "" Then
                Response.ContentType = type
            End If
            Response.AddHeader("Content-Disposition", "attachment;filename=" & Replace(filepath.ToString(), _portalSettings.UploadDirectory, ""))
            Response.BinaryWrite(data)
            Response.End()

Answer 3

Response.WriteFile()即可
Response.End()也不需要最好把这个页面的html代码清空Response.AddHeader("Content-Disposition", "attachment;filename=" & strFile);
之前最好先将strFile = Server.UrlEncode(strFile);

Answer 4

三句就够了string file = 文件名;
Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file));
Response.WriteFile(文件完整路径);