How can I validate for only CSV file uploads using the pattern attribute using HTML5?

Question

My HTML looks like this:

<form>
    <input type="file" name="txtFile" pattern="?" id="txtFile" class="required"/>
</form>

pattern = '?'

Using which regular expression I would add the validation for the ONLY CSV FILE ALLOW.

If I upload .xls or any another file then it will display an error.

@Disha : yes , it should be possible using js , but i have to create using html5.. — Vijay Chauhan
– Vijay Chauhan, Commented Dec 21, 2015 at 7:31
@Disha: I suspect that this isolated closing tag is more often used than any other (obviously in non-HTML text, or should be). I can’t prove it — Google, Yahoo search, and Bing all ignore the non-alphabetics when told to search for — but that’s how ISTM. — devpro
– devpro, Commented Dec 21, 2015 at 7:55

Peter Mortensen · Accepted Answer · 2015-12-21 10:26:21Z

35

Now you can use the new HTML5 input validation attribute:

pattern="^.+\.(xlsx|xls|csv)$"

Accept type for other files (Reference: HTML5 Documentation):

For CSV:

<input type="file" accept=".csv" />

For Excel files, 2003-2007 (.xls):

<input type="file" accept="application/vnd.ms-excel" />

For Excel files, 2010 (.xlsx):

<input type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />

For text files (.txt):

<input type="file" accept="text/plain" />

For image files (.png, .jpg, etc.):

<input type="file" accept="image/*" />

For HTML files (.htm, .html):

<input type="file" accept="text/html" />

For video files (.avi, .mpg, .mpeg, .mp4):

<input type="file" accept="video/*" />

For audio files (.mp3, .wav, etc.):

<input type="file" accept="audio/*" />

For PDF files, use:

<input type="file" accept=".pdf" />

edited Dec 21, 2015 at 10:26

Peter Mortensen

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answered Dec 21, 2015 at 7:34

devpro

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2 Comments

Disha V. Over a year ago

stackoverflow.com/questions/11832930/… ???

devpro Over a year ago

@Disha: of course, reference mentioned. you can get online aswell

Volodymyr K · Accepted Answer · 2019-06-27 07:58:31Z

8

It is not easy to accept just one of the file types. It depends on different OS and installed text reading programmes. In Unix type systems if you pass .csv file you will get .csv file type, but if you will pass the same file on Windows you will ger different file types, such as text/comma-separated-values, text/csv, application/csv, application/excel, application/vnd.ms-excel, application/vnd.msexcel, text/anytext.

It calls mime-types and can be different for any of text type files. Here is the link where you can read more.

answered Jun 27, 2019 at 7:58

Volodymyr K

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Comments

Dray · Accepted Answer · 2015-12-21 10:46:40Z

6

Use this:

<input type="file" name="txtFile" id="txtFile" class="required" accept=".csv,text/csv" />

Mentioning the MIME type is good practice.

edited Dec 21, 2015 at 10:46

answered Dec 21, 2015 at 7:33

Dray

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Comments

aceraven777 · Accepted Answer · 2015-12-21 07:31:37Z

4

Try this:

<input type="file" name="txtFile" accept=".csv" id="txtFile" class="required" />

answered Dec 21, 2015 at 7:31

aceraven777

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1 Comment

aceraven777 Over a year ago

Using the accept attribute you can validate any kind of file extension e.g. accept=".csv,.xls,.xlsx"

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