File Upload

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  • shapper
    #1

    File Upload

    Hello,

    I need to upload a file. Can I only do this with the File Upload
    control?

    I also need the following:

    - Send upload info, upload percentage, continuously to a JavaScript
    function so I can display the Upload Progress.

    - The controls would be inside an Update Panel.

    Before I start to upload a file I send data to a database. This is
    done.

    After the data has been inserted in database the file upload would
    start.

    The Upload Panel would "finish" when the file finishes upload.

    Is this possible?

    Could I get some help on this?

    Thanks,

    Miguel
    Tags: None
    • Anthony Jones
      #2
      Re: File Upload

      "shapper" <mdmoura@gmail. comwrote in message
      news:db7c3f3b-5261-4041-8063-4ea06e8f4940@d2 1g2000prf.googl egroups.com...
      Hello,
      >
      I need to upload a file. Can I only do this with the File Upload
      control?
      >
      I also need the following:
      >
      - Send upload info, upload percentage, continuously to a JavaScript
      function so I can display the Upload Progress.
      >
      Unfortunately there is currently no support in browsers to support this.
      You would need an extra component installed on the client that can handle
      the upload and provide a means of displaying a progress bar (typically a
      progress event that can be consumes by the sites Javascript).

      - The controls would be inside an Update Panel.
      >
      Before I start to upload a file I send data to a database. This is
      done.
      >
      After the data has been inserted in database the file upload would
      start.
      >
      What happens if the upload fails? Do you need to reverse out the DB changes?

      Consider uploading to a temporary location first, then a post to the server
      can update the database and move the file from its temporary location to its
      persistent location in a more atomic operation. If the upload fails, you've
      not got rubbish in your DB that you need to clear up.
      The Upload Panel would "finish" when the file finishes upload.
      >
      Is this possible?
      >
      Without client side component support the only way to upload a file is via a
      Form post from the browser. Unfortunately Form posts were never intended to
      carry large amounts of data and therefore no thought has been given to
      providing the user with progress info on the upload.

      If you're desperate then you might get away with performing the Form post
      from a page in an IFrame, you could have a progress bar in the host page
      polling the server and retrieving the size of the temporary file. I'm not
      entirely sure how you would retrieve the expected final size of the file
      though (I'm not familiar with the file upload control where you might expect
      to get that info, I use a client side component instead).


      --
      Anthony Jones - MVP ASP/ASP.NET


        Comment

        • Jevon
          #3
          Re: File Upload

          I've previously come across (but not yet used)
          http://www.brettle.com/neatupload - have you seen this yet? I have no idea
          if it can be used with an UpdatePanel, but I think it does the other stuff
          you mention.

          I agree with Anthony though, ideally you shouldn't be updating anything in
          the database until you have the file on the server to work with.

          Jevon


          "shapper" <mdmoura@gmail. comwrote in message
          news:db7c3f3b-5261-4041-8063-4ea06e8f4940@d2 1g2000prf.googl egroups.com...
          Hello,
          >
          I need to upload a file. Can I only do this with the File Upload
          control?
          >
          I also need the following:
          >
          - Send upload info, upload percentage, continuously to a JavaScript
          function so I can display the Upload Progress.
          >
          - The controls would be inside an Update Panel.
          >
          Before I start to upload a file I send data to a database. This is
          done.
          >
          After the data has been inserted in database the file upload would
          start.
          >
          The Upload Panel would "finish" when the file finishes upload.
          >
          Is this possible?
          >
          Could I get some help on this?
          >
          Thanks,
          >
          Miguel

            Comment

            • Ilyas
              #4
              Re: File Upload

              On 12 Feb, 10:52, "Jevon" <ple...@ask.com wrote:
              I've previously come across (but not yet used)http://www.brettle.com/neatupload- have you seen this yet? I have no idea
              if it can be used with an UpdatePanel, but I think it does the other stuff
              you mention.
              >
              I agree with Anthony though, ideally you shouldn't be updating anything in
              the database until you have the file on the server to work with.
              >
              Jevon
              >
              "shapper" <mdmo...@gmail. comwrote in message
              >
              news:db7c3f3b-5261-4041-8063-4ea06e8f4940@d2 1g2000prf.googl egroups.com...
              >
              >
              >
              Hello,
              >
              I need to upload a file. Can I only do this with the File Upload
              control?
              >
              I also need the following:
              >
              - Send upload info, upload percentage, continuously to a JavaScript
              function so I can display the Upload Progress.
              >
              - The controls would be inside an Update Panel.
              >
               Before I start to upload a file I send data to a database. This is
              done.
              >
               After the data has been inserted in database the file upload would
              start.
              >
               The Upload Panel would "finish" when the file finishes upload.
              >
              Is this possible?
              >
              Could I get some help on this?
              >
              Thanks,
              >
              Miguel- Hide quoted text -
              >
              - Show quoted text -
              Telerik have a file upload control which can do exactly this
              See http://www.telerik.com/products/aspn.../overview.aspx

                Comment

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