Objective-C

Get an Alternative Body into a BinData

Demonstrates the Chilkat Email.GetAlternativeBodyBd method, which copies the contents of the Nth alternative body into a BinData object. The first alternative body is at index 0, and it should only be called when NumAlternatives is greater than 0. This example builds a message with plain-text and HTML alternatives and copies the first into a BinData.

Background: This is the binary counterpart to GetAlternativeBody (which returns text). Reading an alternative into a BinData preserves the exact bytes — important when a body part uses a binary or unusual transfer encoding, or when you intend to hash it or write it out verbatim rather than decode it to a string.

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Objective-C

#import <CkoEmail.h>
#import <CkoBinData.h>

BOOL success = NO;

//  Demonstrates the GetAlternativeBodyBd method, which copies the contents of the Nth
//  alternative body into a BinData object.  The first alternative body is at index 0; call
//  only when NumAlternatives is greater than 0.

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"GetAlternativeBodyBd example";

[email SetTextBody: @"This is the plain-text alternative." contentType: @"text/plain"];
[email AddHtmlAlternativeBody: @"<html><body>This is the HTML alternative.</body></html>"];

//  Copy the first alternative body (index 0) into a BinData object.
CkoBinData *bd = [[CkoBinData alloc] init];

success = [email GetAlternativeBodyBd: [NSNumber numberWithInt: 0] binData: bd];
if (success == NO) {
    NSLog(@"%@",email.LastErrorText);
    return true;
}

NSLog(@"%@%d",@"Alternative 0 size (bytes) = ",[bd.NumBytes intValue]);