javascript for checking the size of fileupload

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I want a client side script(javascrpt) for checking the size of file uploading for file upload control in asp.net(before uploading)..
can any one help for this....

Posted 1-Jan-13 22:37pm

aravindnass

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3 solutions

Solution 2

As JavaScript runs on client-side, it cannot access the local file system. You can't read or write files on the user’s computer because of security feature to prevent sites doing anything they like on your computer. For example writing files or viruses on your computer, So in short you can not calculate the file size using JavaScript.

Posted 1-Jan-13 22:41pm

Zafar Sultan

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aravindnass 2-Jan-13 4:55am

but if I select about 17.9MB size file..and click the save button,then the mozilla showing - problem loading page("Connection was reset")

aravindnass 2-Jan-13 4:57am

but if I select about 17.9MB size file..and click the save button,then the mozilla showing - problem loading page("Connection was reset")..

how can I solve this..?

Niral Soni 2-Jan-13 5:18am

It is because when you are uploading large file, the actual upload is processed by your server. Depending upon the session timeout defined in the config files, you may receive this message - "Problem loading page ('Connection was reset')"

As far as identifying file size in JavaScript, it is achievable using the ActiveX control, but will only work in IE.

Zafar Sultan 2-Jan-13 6:13am

Modify your web.config file to allow uploading large files.

aravindnass 3-Jan-13 2:19am

how can I check this..?

aravindnass 3-Jan-13 2:20am

can u send sample for setting the maximum length in web.config

Solution 1

Impossible. If javascript could access the file system, the web would be so insecure, no-one would use it.

Posted 1-Jan-13 22:38pm

Christian Graus

Comments

aravindnass 2-Jan-13 4:55am

but if I select about 17.9MB size file..and click the save button,then the mozilla showing - problem loading page("Connection was reset")

aravindnass 2-Jan-13 4:55am

but if I select about 17.9MB size file..and click the save button,then the mozilla showing - problem loading page("Connection was reset")..

how can I solve this..?

Christian Graus 2-Jan-13 13:19pm

Fix your server setup so that it doesn't time out.

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Zafar Sultan · Accepted Answer · 2013-01-02T20:39:00

Solution 3

Add this to your web.config

HTML

<configuration>
  <system.web>
    <httpruntime maxrequestlength="sizeinKB" />
  </system.web>
</configuration>

Replace sizeinKB with numeric value. It has to be in KB. Default is 4096(4MB)

Posted 2-Jan-13 20:39pm

Zafar Sultan