Jagadish Pulakhandam's: May, 2007

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May 18

TIP: File download using ASP.NET

The following is a method to send a file to browser using ASP.NET

Dim fs As FileStream
Dim strPath = "C:\DownloadableFilePath\"
Dim strFileName As String = "Filename.pdf"
fs = File.Open(strPath & strFileName, FileMode.Open)
Dim bytBytes(fs.Length) As Byte
fs.Read(bytBytes, 0, fs.Length)
fs.Close()
Response.AddHeader("Content-disposition", "attachment; filename=" & strFileName)
Response.ContentType = "application/octet-stream"
Response.BinaryWrite(bytBytes)
Response.End() 'or Response.Redirect("somepage.aspx",false)

Alternatively, you can also use (if it is available within web application folders) with WriteFile() as follows

Public Sub SecureFileDownload(ByVal inFile As String)
    Dim strFileNamePath As String
    strFileNamePath = Request.MapPath("SecureDirectory") & "\" & inFile
    Dim myFile As FileInfo = New FileInfo(strFileNamePath)
    Response.Clear()
    Response.AddHeader("Content-Disposition", "attachment; filename=" & myFile.Name)
    Response.AddHeader("Content-Length", myFile.Length.ToString())
    Response.ContentType = "application/octet-stream"
    Response.WriteFile(myFile.FullName)
    Response.End()
End Sub

thanks

Jag

TIP: Developing ASP.NET 2.0 applications simultaneously with both C# and VB.NET

If the code (say some classes) is written in C# and if the application is being developed in Visual Basic.NET, you can create a separate folder under the App_Code folder. The folder must be added as a code subdirectory in the web.config file as shown here:

<compilation debug="true" strict="false" explicit="true">
  <codeSubDirectories>
    <add directoryName="ProfileProvider" />
  </codeSubDirectories>
</compilation>

By adding the folder as a code subdirectory, all C# files in the folder will be compiled separately from the rest of the Web application project. At run time, two DLLs will be generated in the ASP.NET temporary folder for the application.

Enjoy,

Jag

12:45 PM | Add a comment | Permalink | Blog it | ASP.NET