SQL Server

Get a Header Field of a Related Item

Demonstrates the Chilkat Email.GetRelatedHeader method, which returns the value of a named header field of a related item. The first argument is the zero-based related-item index and the second is the MIME header-field name. This example reads the Content-Type header of a related style sheet.

Background: Each related item is a MIME part with its own header block. Where GetRelatedAttr extracts a single named parameter from a header, GetRelatedHeader returns the entire value of a header field — for example the full Content-Type or Content-Location line — which is handy for inspecting exactly how an embedded resource is described.

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-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    --  Demonstrates the GetRelatedHeader method, which returns the value of a header field (by
    --  name) of a related item.  The first argument is the zero-based related-item index and the
    --  second is the MIME header-field name.

    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_OASetProperty @email, 'Subject', 'GetRelatedHeader example'

    --  Set an HTML body and add a related style sheet (index 0).
    EXEC sp_OAMethod @email, 'SetHtmlBody', NULL, '<html><head><link rel="stylesheet" href="styles.css"/></head><body>Styled.</body></html>'
    EXEC sp_OAMethod @email, 'AddRelatedString2', NULL, 'styles.css', 'body { color: navy; }', 'utf-8'

    --  Get the Content-Type header of the first related item (index 0).
    DECLARE @ct nvarchar(4000)
    EXEC sp_OAMethod @email, 'GetRelatedHeader', @ct OUT, 0, 'Content-Type'

    PRINT 'Related item 0 Content-Type: ' + @ct

    EXEC @hr = sp_OADestroy @email


END
GO