How could i select folder or file from the asp.net web application?

Question

Hello,

I have an ASP.NET web application and I need to put data from the web page to the output text file. I would like to give user an ability to select the folder where the file will be saved. For example, when the user clicks on the 'Browse' button the select folder dialog should appear.

Is it possible to implement such thing in the asp.net web application?

Thanks,

Sergey

Answer 1

Using <input type="file"> the user can only browse the files on his computer. There's no way for him to see folders on the server unless you give him a list or treeview structure so that he can choose from. Here's an example of building such a treeview.

Answer 2

EDIT:

Looking at your comment, I think you mean push to the response stream instead?

 protected void lnbDownloadFile_Click(object sender, EventArgs e)
 {
  String YourFilepath;
  System.IO.FileInfo file = 
  new System.IO.FileInfo(YourFilepath); // full file path on disk
  Response.ClearContent(); // neded to clear previous (if any) written content
  Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
  Response.AddHeader("Content-Length", file.Length.ToString());
  Response.ContentType = "text/plain";
  Response.TransmitFile(file.FullName);
  Response.End();
 }

This should display a dialog box in the browser allowing the user to select where to save the file.

You want to use the FileUpload control

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload.aspx

protected void UploadButton_Click(object sender, EventArgs e)
  {
    // Specify the path on the server to
    // save the uploaded file to.
    String savePath = @"c:\temp\uploads\";

    // Before attempting to perform operations
    // on the file, verify that the FileUpload 
    // control contains a file.
    if (FileUpload1.HasFile)
    {
      // Get the name of the file to upload.
      String fileName = FileUpload1.FileName;

      // Append the name of the file to upload to the path.
      savePath += fileName;


      // Call the SaveAs method to save the 
      // uploaded file to the specified path.
      // This example does not perform all
      // the necessary error checking.               
      // If a file with the same name
      // already exists in the specified path,  
      // the uploaded file overwrites it.
      FileUpload1.SaveAs(savePath);

      // Notify the user of the name of the file
      // was saved under.
      UploadStatusLabel.Text = "Your file was saved as " + fileName;
    }
    else
    {      
      // Notify the user that a file was not uploaded.
      UploadStatusLabel.Text = "You did not specify a file to upload.";
    }

  }

Answer 3

Such download dialog is browser specific.

Have a look at generic handlers with Response.Write or even better write a Http Handler for such purpose.