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Dynamics 365 Community / Forums / Business Central forum / Getting error When Usi...
Business Central forum

Getting error When Using Stream functions in AL Code.

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Posted on by Manikanta_501 245

Hello All.,

When I am Using Stream( Write() , Open() , etc.. ) functions in AL Language for Business Central of Cloud Version(SaaS) Getting error . Can any one suggest me what I have to do , to use these functions in my Code or Is there any alternative.

Error : The type or method 'Write' cannot be used for 'Extension' development.

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I have the same question (0)
  • Suggested answer
    Stefano Demiliani Profile Picture
    Stefano Demiliani 37,166 Most Valuable Professional on at

    You need to use InStream and OutStream data types on SaaS:

    docs.microsoft.com/.../instream-and-outstream-data-types

  • Manikanta_501 Profile Picture
    Manikanta_501 245 on at
     I Defined Variables Like below in a Function 
    var
    MyFile: File;
    DestinationFile: File;
    StreamInTest: InStream;
    OutStreamTest: OutStream;
    Buffer: Text[250];
    SkipLF: Boolean;
    PackingCenterL: Record 14027060;
    And Write Code Like below.
    begin
    NewFilePath := INSSTR(FilePathP,'_',STRLEN(FilePathP)-3);
    MyFile.OPEN(FilePathP);
    MyFile.CREATEINSTREAM(StreamInTest);
    IF EXISTS(NewFilePath) THEN
    ERASE(NewFilePath);
    DestinationFile.CREATE(NewFilePath);
    DestinationFile.CREATEOUTSTREAM(OutStreamTest);
     
    Even though I am Getting same error.
     
    Error : The type or method 'Open' cannot be used for 'Extension' development
  • Suggested answer
    Stefano Demiliani Profile Picture
    Stefano Demiliani 37,166 Most Valuable Professional on at

    File.OPEN is not supported on SaaS, you don't have a file system in the cloud. You need to use UploadIntoStream to load a file to an InStream.

  • Manikanta_501 Profile Picture
    Manikanta_501 245 on at

    Can you give me an example for better understanding.

  • Suggested answer
    Stefano Demiliani Profile Picture
    Stefano Demiliani 37,166 Most Valuable Professional on at

    Example:

    var

           FileInstream: InStream;

           FileName: Text;

       begin

           if UploadIntoStream('', '', '', FileName, FileInstream) then

           begin

              //Here you have your InStream loaded with the file content

  • Manikanta_501 Profile Picture
    Manikanta_501 245 on at

    I Wrote Code like below in my Codeunit

    OutputFile: File;(Variable)

    OutputFile.WRITE(STRSUBSTNO('A%1,%2,0,3,1,1,N,"%3"',ColNo, RowNo, PackageLineL."No."));

    And Getting error "The type or method 'Write' cannot be used for 'Extension' development"

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