Using HTML5 file (Multiple) control in asp.net

Question

I am looking for a way to perfectly manage the <input type="file" multiple="multiple"> tag of HTML 5 in my asp.net 3.5 project. I have done it before with a single control on page, but what if we have multiple upload controls on the same page. Please see my code:

protected void btnSave_Click(object sender, EventArgs e)
{
//---------Need to check if my upload control has files: Please suggest a perfect way 
if (fupAttachment.PostedFile != null || fupAttachment.PostedFile.FileName != "" || fupAttachment.PostedFile.ContentLength>0)//here is a problem, as it does not checks for a blank file upload control
HttpFileCollection hfc = Request.Files;
            string strDirectory = Server.MapPath("~/") + "Mailer/" + hidCampID.Value;
            if (hfc.Count>0)
            {
                if (!System.IO.Directory.Exists(strDirectory))
                {
                    System.IO.Directory.CreateDirectory(strDirectory);
                }
                if (System.IO.Directory.Exists(strDirectory))
                {
                    for (int i = 0; i < hfc.Count - 1; i++)
                    {
                        hfc[i].SaveAs(strDirectory + "/" + hfc[i].FileName.Replace(" ", "_"));
                    }
                }
            }
     }
}

My asp page is something like this:

//----this control is from which I want to multiple upload files
<input type="file" multiple="multiple" runat="server" id="fupAttachment" />

// Another upload control is there which takes input when page loads
<asp:FileUpload ID="fupMailingList" runat="server" />

So, exactly my problem is that when page loads "fupMailingList" has taken a file, and then when I want to use my multiple upload control "fupAttachment", I am unable to check if it has any files or not, as hfc checks for all upload controls and it gets file in one of them. So, please tell me a way to check only "fupAttachment" control and then do my work correctly.

nunespascal · Accepted Answer · 2013-02-13 08:25:28Z

1

Rather than iterating over all the files in the request, you should check on a per input basis.

var uploadedFiles = Request.Files.GetMultiple("fupAttachment");
if(uploadedFiles.Count > 0)
{
  //
}

answered Feb 13, 2013 at 8:25

nunespascal

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Comments

Karthik Chintala · Accepted Answer · 2013-02-13 09:24:11Z

0

Just check the HasFile property.

if(fupMailingList.HasFile){
//Do something
}

answered Feb 13, 2013 at 9:24

Karthik Chintala

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