(SQL Server) Transition from MailMan.FetchSingleHeaderByUidl to MailMan.FetchByUidl

Provides instructions for replacing deprecated FetchSingleHeaderByUidl method calls with FetchByUidl.

Note: This example requires Chilkat v11.0.0 or greater.

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @mailman int
    -- Use "Chilkat_9_5_0.MailMan" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.MailMan', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- ...
    -- ...

    DECLARE @numBodyLines int
    SELECT @numBodyLines = 5
    DECLARE @uidl nvarchar(4000)
    SELECT @uidl = '123'

    -- ------------------------------------------------------------------------
    -- The FetchSingleHeaderByUidl method is deprecated:

    DECLARE @emailObj int
    EXEC sp_OAMethod @mailman, 'FetchSingleHeaderByUidl', @emailObj OUT, @numBodyLines, @uidl
    EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END

    -- ...
    -- ...

    EXEC @hr = sp_OADestroy @emailObj

    -- ------------------------------------------------------------------------
    -- Do the equivalent using FetchByUidl.
    -- Your application creates a new, empty Email object which is passed 
    -- in the last argument and filled upon success.

    DECLARE @headerOnly int
    SELECT @headerOnly = 1

    DECLARE @emailOut int
    -- Use "Chilkat_9_5_0.Email" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Email', @emailOut OUT

    DECLARE @success int
    EXEC sp_OAMethod @mailman, 'FetchByUidl', @success OUT, @uidl, @headerOnly, @numBodyLines, @emailOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        EXEC @hr = sp_OADestroy @emailOut
        RETURN
      END

    EXEC @hr = sp_OADestroy @mailman
    EXEC @hr = sp_OADestroy @emailOut


END
GO