File upload control in ASP.NET

Question

i am using file upload control in ASP.NET for uploading images. In my form there are two buttons.one for assigning criteria which redirects to other form and other for submitting form. After assigning criteria only the user has to use submit button.

My problem is when is upload image and click on AssignCriteria button and return back to original page,the upload control is getting blank. How to keep that upload image control value in that textbox even if we redirected to other page and come back.

abatishchev · Accepted Answer · 2010-08-09 09:11:26Z

1

<asp:FileUpload runat="server" ID="uploadStatement" />
<asp:Button runat="server" Text="Upload" OnClick="cmdUpload_Click" />

Next code uploads selected file to Temp folder on the server, in my case - parses it and deletes the file.

    protected void cmdUpload_Click(object sender, EventArgs e)
    {
        var fileName = Server.MapPath(Path.Combine("Temp", String.Concat(Guid.NewGuid().ToString(), Path.GetExtension(uploadStatement.FileName))));
        try
        {
            uploadStatement.SaveAs(fileName);

            // parse file
        }
        finally
        {
            File.Delete(fileName);
        }
    }

answered Aug 9, 2010 at 9:11

abatishchev

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Nerevar · Accepted Answer · 2010-08-09 09:05:03Z

0

Since any manipulation with the "input type='file'" element is a serious security threat I am afraid there is no way to do this.

Have you considered using of some AJAX overlay "dialog"?

answered Aug 9, 2010 at 9:05

Nerevar

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