Reading XML Encoding errors

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  • AGP
    #1

    Reading XML Encoding errors

    I am programming an XML reader in VB.NET 2005 and it works fairly well.
    Once in a while though I encounter an old XML file without the header
    <?xml version="1.0" encoding="UTF-8"?>
    It craps out on the Load with an error similar to "Invalid character in the
    given encoding. Line 3, position 5475070".
    After some research the character in question is the copyright character. My
    question is how can i force the reader to assume UTF-8?
    It seems like my other newer files do not have this problem, just my older
    files. I want to be able to catch this error
    and then attempt to load the file. It also seems like this older file does
    not have a BOM so Im assuming the XML reader has no idea how to interpret
    it. Im hoping i can force a UTF-8 read of the XML file.

    As a secondary question, it seems like these older XML files were
    originally written out as one or two huge lines. is there a way to output a
    copy
    that is more user readable in the node-type format with line breaks and all?

    Thanks for any help
    AGP



    Tags: None
    • Herfried K. Wagner [MVP]
      #2
      Re: Reading XML Encoding errors

      "AGP" <sindizzy.pak@s ofthome.netschr ieb:
      Once in a while though I encounter an old XML file without the header
      <?xml version="1.0" encoding="UTF-8"?>
      It craps out on the Load with an error similar to "Invalid character in
      the given encoding. Line 3, position 5475070".
      After some research the character in question is the copyright character.
      My question is how can i force the reader to assume UTF-8?
      It seems like my other newer files do not have this problem, just my older
      files. I want to be able to catch this error
      and then attempt to load the file. It also seems like this older file does
      not have a BOM so Im assuming the XML reader has no idea how to interpret
      it. Im hoping i can force a UTF-8 read of the XML file.
      IIRC UTF-8 is the default encoding for XML files.

      --
      M S Herfried K. Wagner
      M V P <URL:http://dotnet.mvps.org/>
      V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

        Comment

        • AGP
          #3
          Re: Reading XML Encoding errors


          "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.atwrot e in message
          news:O13Pgm1AIH A.4584@TK2MSFTN GP03.phx.gbl...
          "AGP" <sindizzy.pak@s ofthome.netschr ieb:
          >Once in a while though I encounter an old XML file without the header
          ><?xml version="1.0" encoding="UTF-8"?>
          >It craps out on the Load with an error similar to "Invalid character in
          >the given encoding. Line 3, position 5475070".
          >After some research the character in question is the copyright character.
          >My question is how can i force the reader to assume UTF-8?
          >It seems like my other newer files do not have this problem, just my
          >older files. I want to be able to catch this error
          >and then attempt to load the file. It also seems like this older file
          >does not have a BOM so Im assuming the XML reader has no idea how to
          >interpret it. Im hoping i can force a UTF-8 read of the XML file.
          >
          IIRC UTF-8 is the default encoding for XML files.
          >
          ok so then why do i get the error? I did a test and loaded the XML into
          notepad
          and then saved that file as Text UTF-8 and it seems that file is read
          correctly. So my
          question is why does the original not load properly?

          AGP


            Comment

            • Herfried K. Wagner [MVP]
              #4
              Re: Reading XML Encoding errors

              "AGP" <sindizzy.pak@s ofthome.netschr ieb:
              >IIRC UTF-8 is the default encoding for XML files.
              >
              ok so then why do i get the error? I did a test and loaded the XML into
              notepad
              and then saved that file as Text UTF-8 and it seems that file is read
              correctly. So my
              question is why does the original not load properly?
              Maybe it's stored in an encoding other than UTF-8, Windows ANSI, for
              example.

              --
              M S Herfried K. Wagner
              M V P <URL:http://dotnet.mvps.org/>
              V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

                Comment

                • Martin Honnen
                  #5
                  Re: Reading XML Encoding errors

                  AGP wrote:
                  I will ask but the source could be from a variety of providers so I may end
                  up
                  with no concrete answer as to whats used for encoding. However i did open
                  the file in Notepad and added the XML declaration and then just did a plain
                  old save and the file still errors out. But in my mind of there is no
                  declaration then
                  the functions assume a UTF-8 correct? But not sure why if this is the case
                  why
                  I still get an error.
                  Try whether using
                  New StreamReader("f ile.xml", Encoding.Defaul t)
                  works with those files.


                  --

                  Martin Honnen --- MVP XML
                  http://JavaScript.FAQTs.com/

                    Comment

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