Requirements for File and Folder Names

Before you add new or existing files and folders to your app, verify that your resources meet the following requirements for file and folder names. The same requirements apply when you attempt to rename a file or folder in your app.

  • The file or folder name must comply with the Windows naming convention. For more information about the Windows naming convention for files and folders, see Naming Files, Paths and Namespaces on MSDN.
  • The complete file path for the file or folder after the upload must comply with the Windows maximum path length limitation. For more information about the Windows maximum path length limitation, see Naming Files, Paths and Namespaces on MSDN.
  • The file or folder name must consist of any of the following characters: A-Z, a-z, 0-9, tilde (~), underscore (_), dot (.), plus (+), hyphen (-), at (@), dollar sign ($), ampersand (&), semi-colon (;), comma (,), opening bracket ((), closing bracket ()) or space ( ).
  • The file extension cannot be EXE, PROJ or BAT.
  • The file or folder name might start with a leading dot (for example .myfile.html) but you might experience issues with such files and folders during builds. The AppBuilder build infrastructure recognizes such items as hidden items and does not include them in the application package on build. To include such items in the application package, you must rename them to remove the leading dot.

See Also

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