Evaluate contenttype

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  • John Boghossian
    #1

    Evaluate contenttype

    Does anyone know what really happens when you call the method contenttype on
    the object httpPostedFile that returns the mime-type for the uploaded file.

    Is it so that the post request includes the mimetype as a string that has
    benn evaluated in the client and is attached to the post to the server
    Or is it the webserver that extracts the file extension from the posted
    file and looks it up in it´s own registry?

    The reason for this is that i want to remodel an old function that used a
    file post and instead use a web service request that takes the arguments
    filename, bytearray and so on. But i am wondering about the best way to
    evaluate the files mimetype. Clientside or serverside.

    Regards
    John Boghossian



    Tags: None
    • Jacob Yang [MSFT]
      #2
      RE: Evaluate contenttype

      Hi John,

      Thank you for posting to the MSDN newsgroups.

      I am interested in this issue and researching on it now. I will update you
      as soon as possible.

      Best regards,

      Jacob Yang
      Microsoft Online Partner Support
      Get Secure! ¨C www.microsoft.com/security
      This posting is provided "as is" with no warranties and confers no rights.

        Comment

        • John Boghossian
          #3
          Re: Evaluate contenttype

          Hi there Jacob,

          I am most greatful for your interest in this matter. The solution i am
          envisioning is an clientside-control that will allow drag and drop from the
          filesystem and possibly from outlook/exchange to automatically upload a
          document to the server when a user drops a file on the control. The control
          will be used in an assignment tracking system for our business intelligence
          dept.

          The system is an intranet solution so the environment is controlled so i
          don´t have to care about other browsers that the IE -standard we use.

          I am looking forward to hear from you.

          Best regards
          John Boghossian

          "Jacob Yang [MSFT]" <jiany@online.m icrosoft.com> wrote in message
          news:pLknHLBuDH A.1376@cpmsftng xa06.phx.gbl...[color=blue]
          > Hi John,
          >
          > Thank you for posting to the MSDN newsgroups.
          >
          > I am interested in this issue and researching on it now. I will update you
          > as soon as possible.
          >
          > Best regards,
          >
          > Jacob Yang
          > Microsoft Online Partner Support
          > Get Secure! ¨C www.microsoft.com/security
          > This posting is provided "as is" with no warranties and confers no rights.
          >[/color]


            Comment

            • Jacob Yang [MSFT]
              #4
              Re: Evaluate contenttype

              Hi John,

              I have done a lot of research regarding this issue. Please refer to the
              following URL carefully.

              File Upload Control Object
              http://msdn.microsoft.com/library/default.asp?url=/workshop/management/tools

              /reference/file_upload_con trol.asp
              "...
              The File Upload Control is an Microsoft ActiveX control onto which users
              can drag and drop files or directories for posting to the server hosting
              the page with the control.
              ...

              If I have misunderstood your concern, please feel free to let me know.

              Best regards,

              Jacob Yang
              Microsoft Online Partner Support
              Get Secure! ¨C www.microsoft.com/security
              This posting is provided "as is" with no warranties and confers no rights.

                Comment

                • John Boghossian
                  #5
                  Re: Evaluate contenttype

                  Well i guess that I could go ahead and use that control.
                  However i still am a bit curious to know where the contenttype is evaluated,
                  if it in fact is evaluated on the client and passed along in the post for
                  the server to extract or if the server evaluates it based on it´s knowledge
                  of files.

                  Regards
                  John

                  "Jacob Yang [MSFT]" <jiany@online.m icrosoft.com> wrote in message
                  news:zKHafmVuDH A.2436@cpmsftng xa06.phx.gbl...[color=blue]
                  > Hi John,
                  >
                  > I have done a lot of research regarding this issue. Please refer to the
                  > following URL carefully.
                  >
                  > File Upload Control Object
                  >[/color]
                  http://msdn.microsoft.com/library/de...nagement/tools[color=blue]
                  > /reference/file_upload_con trol.asp
                  > "...
                  > The File Upload Control is an Microsoft ActiveX control onto which users
                  > can drag and drop files or directories for posting to the server hosting
                  > the page with the control.
                  > ..
                  >
                  > If I have misunderstood your concern, please feel free to let me know.
                  >
                  > Best regards,
                  >
                  > Jacob Yang
                  > Microsoft Online Partner Support
                  > Get Secure! ¨C www.microsoft.com/security
                  > This posting is provided "as is" with no warranties and confers no rights.
                  >[/color]


                    Comment

                    • Jacob Yang [MSFT]
                      #6
                      Re: Evaluate contenttype

                      Hi John,

                      Based on my research and experience, the contenttype is evaluated on the
                      client. Please refer to the following article for more detailed information
                      regarding this issue.

                      File Upload with ASP.NET
                      http://www.codeproject.com/aspnet/fileupload.asp#get


                      I hope it helps.

                      Best regards,

                      Jacob Yang
                      Microsoft Online Partner Support
                      Get Secure! ¨C www.microsoft.com/security
                      This posting is provided "as is" with no warranties and confers no rights.

                        Comment

                        • Jacob Yang [MSFT]
                          #7
                          Re: Evaluate contenttype

                          Hi John,

                          Based on my research and experience, the contenttype is evaluated on the
                          client. Please refer to the following article for more detailed information
                          regarding this issue.

                          File Upload with ASP.NET
                          http://www.codeproject.com/aspnet/fileupload.asp#get


                          I hope it helps.

                          Best regards,

                          Jacob Yang
                          Microsoft Online Partner Support
                          Get Secure! ¨C www.microsoft.com/security
                          This posting is provided "as is" with no warranties and confers no rights.

                            Comment

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