SQL Server

Create Zip in a BinData Object

See more Zip Examples

Recursively appends files in a directory tree and writes a zip archive into a Chilkat BinData object. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @zip int
    EXEC @hr = sp_OACreate 'Chilkat.Zip', @zip OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Initialize the zip object.  Because we will never actually write a zip file to the filesystem,
    -- the filepath passed to NewZip does not matter.
    EXEC sp_OAMethod @zip, 'NewZip', @success OUT, 'x.zip'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Append a directory tree.  The call to AppendFiles does
    -- not read the file contents or append them to the zip
    -- object in memory.  It simply appends references
    -- to the files so that when WriteBd, WriteZip, or WriteZipAndClose 
    -- is called, the referenced files are streamed and compressed
    -- into the .zip output file (or BinData object).

    DECLARE @recurse int
    SELECT @recurse = 1
    EXEC sp_OAMethod @zip, 'AppendFiles', @success OUT, 'c:/temp/a/*', @recurse
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Write the zip archive into the bdZip object.
    DECLARE @bdZip int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bdZip OUT

    EXEC sp_OAMethod @zip, 'WriteBd', @success OUT, @bdZip
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @bdZip
        RETURN
      END

    -- We could directly access the bytes of the zip archive, or perhaps
    -- get the zip bytes in base64 format.
    DECLARE @zipAsBase64 nvarchar(4000)
    EXEC sp_OAMethod @bdZip, 'GetEncoded', @zipAsBase64 OUT, 'base64'

    PRINT @zipAsBase64

    -- Or the zip can be used by some other Chilkat method call that accepts
    -- a BinData object as an argument.

    EXEC @hr = sp_OADestroy @zip
    EXEC @hr = sp_OADestroy @bdZip


END
GO