Objective-C

Get the Content-Type of an Attachment

Demonstrates the Chilkat Email.GetAttachmentContentType method, which returns the Content-Type header field for the Nth attachment. Attachment indexing begins at 0. This example adds an attachment and reads its content type.

Background: The Content-Type (MIME type) of an attachment — such as text/plain, application/pdf, or image/png — tells a mail client how to handle the part: whether to display it inline, offer it as a download, or pick an icon for it. Reading it lets your program filter or route attachments by type, for example extracting only the PDFs from a batch of messages.

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Objective-C

#import <CkoEmail.h>
#import <NSString.h>

//  Demonstrates the GetAttachmentContentType method, which returns the Content-Type header
//  field for the Nth attachment.  The index is zero-based.

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"Attachment content type";

[email AddStringAttachment: @"notes.txt" str: @"Some notes."];

//  Get the Content-Type of the first attachment (index 0).
NSString *ct = [email GetAttachmentContentType: [NSNumber numberWithInt: 0]];
NSLog(@"%@%@",@"Attachment 0 Content-Type: ",ct);