Get an Alternative Body into a BinData

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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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#include <C_CkEmail.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEmail email;
    HCkBinData bd;

    success = FALSE;

    //  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.

    email = CkEmail_Create();
    CkEmail_putSubject(email,"GetAlternativeBodyBd example");

    CkEmail_SetTextBody(email,"This is the plain-text alternative.","text/plain");
    CkEmail_AddHtmlAlternativeBody(email,"<html><body>This is the HTML alternative.</body></html>");

    //  Copy the first alternative body (index 0) into a BinData object.
    bd = CkBinData_Create();

    success = CkEmail_GetAlternativeBodyBd(email,0,bd);
    if (success == FALSE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkEmail_Dispose(email);
        CkBinData_Dispose(bd);
        return;
    }

    printf("Alternative 0 size (bytes) = %d\n",CkBinData_getNumBytes(bd));


    CkEmail_Dispose(email);
    CkBinData_Dispose(bd);

    }