Tuesday, May 12, 2009

Easy file upload from client to server using FileUpload

I needed a way to do a file upload from client to server without using FTP and found this easy solution using the FileUpload control.


The control appears as a texbox with a Browse... button. The following puts the control on the page and sets the file to be uploaded to directory C:\\rptsys on the server.

<asp:FileUpload ID="FileUpload1" runat="server" filename ="C:\\rptsys\" />

Added a button to initiate the upload and a label to display the result:

<asp:Button ID="Button1" runat="server" Text="UploadFile" onclick="Button1_Click" /> </div> <asp:Label ID="Label1" runat="server" Text="Label"Width="247px"></asp:Label>

I put together a simple UI:

The Browse button opens up a full choose file dialog window.

The backend code:

protected void Button1_Click(object sender, EventArgs e)
if (FileUpload1.HasFile)
Label1.Text = "File Uploaded: " + FileUpload1.FileName;
FileUpload1.SaveAs(@"C:\temp\uploads\" +
Label1.Text = "
No File Uploaded.";

After the file is transmitted, I display a "success" message.

I would have liked to prepopuate the Browse textbox to the directory I know the file is in, but apparently, this cannot be done for security reasons.

1 comment:

  1. You can prepopuate the textbox via JavaScript:

    document.getElementById("<%=FileUpload1.ClientID %>").value = "C:\\somefilelocation\\text.txt";