Category: ASP.NET

18 Sep 2016 01:53

Joined:	10/11/2007
Level:	Silver
Points:	155

Points:	5

How upload mime type in javascript

I am developing an app where a user uploads PDF files to the server, via a FileUpload control.

As part of the usual security/reliability checks I wanted to verify that the uploaded document was actually
a PDF, not just say, a Text file renamed to have a .PDF extension. Now i want in javascript. means client site.

protected void Button1_Click(object sender, EventArgs e)
{
System.IO.BinaryReader r = new System.IO.BinaryReader(FileUpload2.PostedFile.InputStream);
string fileclass = "";
byte buffer;
try
{
buffer = r.ReadByte();
fileclass = buffer.ToString();
buffer = r.ReadByte();
fileclass += buffer.ToString();
}
catch
{
}
r.Close();
if(fileclass!="3780")
{
ltl_status.Text = "<p>Error - The upload file must be in PDF format.</p>"
return;
}
}

#768495

07 Dec 2016 18:41

Joined:	15/12/2015
Level:	Gold
Points:	1308

Points:	2

Hi,
For PDF, standard MIME type is 'application/pdf'.
Please refer this also:
https://www.maxcdn.com/one/tutorial/mime-types/

#768514

10 Dec 2016 06:21

Joined:	30/04/2012
Level:	Gold
Points:	7233

Points:	3

You can try this to upload mime type in javascript

<input type="file" id="your-files" multiple>
<script>
var control = document.getElementById("your-files");
control.addEventListener("change", function(event) {
      var files = control.files,
    for (var i = 0; i < files.length; i++) {
        console.log("Filename: " + files[i].name);
        console.log("Type: " + files[i].type);
        console.log("Size: " + files[i].size + " bytes");
    }
}, false);
</script>

How upload mime type in javascript

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