SQL Server

Get the Content-Type of a Related Item

Demonstrates the Chilkat Email.GetRelatedContentType method, which returns the Content-Type of the Nth related content item in an email. The index is zero-based. This example adds a related style sheet and reads its content type.

Background: Each related item declares a Content-Type — image/png for an inline image, text/css for a style sheet, and so on — that tells the rendering client how to use it. Reading the content type lets a program enumerate a message's embedded resources and act on them by kind, for example collecting every inline image while ignoring the style sheets.

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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 GetRelatedContentType method, which returns the Content-Type of the Nth
    --  related content item in an email.  The index is zero-based.

    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', 'GetRelatedContentType example'

    --  The HTML references the style sheet by name (Content-Location).
    EXEC sp_OAMethod @email, 'SetHtmlBody', NULL, '<html><head><link rel="stylesheet" href="styles.css"/></head><body>Styled.</body></html>'

    --  Add the related style sheet (index 0).
    EXEC sp_OAMethod @email, 'AddRelatedString2', NULL, 'styles.css', 'body { color: navy; }', 'utf-8'

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

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

    EXEC @hr = sp_OADestroy @email


END
GO