(SQL Server) Append Encoded Binary Data to StringBuilder

Demonstrates how to append encoded binary data to the contenets of a StringBuilder.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- 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 @bd int
    -- Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bd OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @bd, 'LoadFile', @success OUT, 'qa_data/jpg/starfish.jpg'
    IF @success = 0
      BEGIN

        PRINT 'Failed to load file.'
        EXEC @hr = sp_OADestroy @bd
        RETURN
      END

    -- For example, let's say we want construct simple JSON containing the base64 representation of the above JPG file.
    DECLARE @sb int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sb OUT

    EXEC sp_OAMethod @sb, 'Append', @success OUT, '{ "jpg": "'
    -- GetEncodedSb appends the enocded representation of the binary data to the StringBuiler passed in the 2nd arg.
    EXEC sp_OAMethod @bd, 'GetEncodedSb', @success OUT, 'base64', @sb
    EXEC sp_OAMethod @sb, 'Append', @success OUT, '" }'

    EXEC sp_OAMethod @sb, 'GetAsString', @sTmp0 OUT
    PRINT @sTmp0

    -- Output looks like this:
    --  { "jpg": "/9j/4AAQSkZJRgABAg...rcQ+vo//2Q==" }

    EXEC @hr = sp_OADestroy @bd
    EXEC @hr = sp_OADestroy @sb


END
GO