Urgent question about multi-file upload

yangcenyin

protected void Button1_Click (object sender, EventArgs e)
    {
        HttpFileCollection files = Request.Files;
        for (int i = 0; i <files.Count; i ++)
        {
            HttpPostedFile postedfile = files [i];
            String filename = Path.GetFileName (postedfile.FileName);
            postedfile.SaveAs (@ "D:\fileload\" + filename);
        }
    }
Why can I upload when the motherboard is not used, but not when using the motherboard?

shenmue024

probably not/
The only difference between a page that uses a motherboard page and a normal page is that the level of the control is lowered by one level, and the rest are the same.

yangcenyin

So I wondered

shenmue024

What is wrong?

yangcenyin

No error reported, it is HttpFileCollection files = Request.Files; after files.count = 0

shenmue024

I also tried it on the motherboard page without this problem.
What controls do you use?

shenmue024

I tried both controls, no problem.

yangcenyin

input file

yangcenyin

I use JS to press the button to add the file domain
<script language = "JavaScript">
    function addFile ()
    {
    var str = '<INPUT type = "file" size = "30" NAME = "File">' + "<br/>";
    document.getElementById ('MyFile'). insertAdjacentHTML ("beforeEnd", str);
    }
    </ script>
But when uploading
 HttpFileCollection files = Request.Files;
        for (int i = 0; i <files.Count; i ++)
        {
            HttpPostedFile postedfile = files [i];
            String filename = Path.GetFileName (postedfile.FileName);
            postedfile.SaveAs (@ "D:\fileload\" + filename);
        }
The files.count here is always equal to 0, but can it be uploaded normally without the motherboard? ? ? ?
Expert advice, is it related to the mother board? ?

shenmue024

You are adding a file control on the client, no wonder.

The control added by the client, even if you don't use the motherboard page, you should not get the Count of Request.Files
Note that there is a 'MyFile' that seems to exist.