SQL Server

Get a Digest Message as an Email Object

Demonstrates the Chilkat Email.GetDigestEmail method, which copies the Nth digest email contained within a multipart/digest into another Email object. The first digest is at index 0; the NumDigests property gives the count. This example loads a digest email and lists each bundled message's subject.

Background: A multipart/digest packs many separate emails into one carrier message — historically used by mailing lists to send a single daily bundle of that day's posts. GetDigestEmail unpacks each member into a full Email object so it can be read or processed individually. This differs from GetAttachedEmail, which extracts messages attached to an ordinary email rather than the members of a digest.

Chilkat SQL Server Downloads

Download Chilkat for SQL Server

SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    --  Demonstrates the GetDigestEmail method, which copies the Nth digest email contained
    --  within a multipart/digest into another Email object.  The first digest is at index 0;
    --  use the NumDigests property for the count.

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

    EXEC sp_OAMethod @email, 'LoadEml', @success OUT, 'qa_data/eml/digest.eml'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @email, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    DECLARE @n int
    EXEC sp_OAGetProperty @email, 'NumDigests', @n OUT

    PRINT 'NumDigests = ' + @n

    --  Retrieve each bundled message as its own Email object.
    DECLARE @digestEmail int
    EXEC @hr = sp_OACreate 'Chilkat.Email', @digestEmail OUT

    DECLARE @i int

    SELECT @i = 0
    WHILE @i <= @n - 1
      BEGIN
        EXEC sp_OAMethod @email, 'GetDigestEmail', @success OUT, @i, @digestEmail


        EXEC sp_OAGetProperty @digestEmail, 'Subject', @sTmp0 OUT
        PRINT 'Digest ' + @i + ' subject: ' + @sTmp0
        SELECT @i = @i + 1
      END

    --  Note: The path "qa_data/..." is a relative local filesystem path,
    --  relative to the current working directory of the running application.

    EXEC @hr = sp_OADestroy @email
    EXEC @hr = sp_OADestroy @digestEmail


END
GO