Unicode C

Get an Attachment's Bytes into a BinData

Demonstrates the Chilkat Email.GetAttachmentBd method, which copies an attachment's binary data into a BinData object. The first attachment is at index 0. This example adds an attachment and copies its bytes into a BinData, printing the byte count.

Background: This is the safe, binary way to extract an attachment — the counterpart to the text-oriented GetAttachmentString. Because attachments are often binary (PDFs, images, archives), copying the raw bytes into a BinData preserves them exactly, ready to write to a file, hash, or pass to another API without any charset conversion that could corrupt the data.

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Unicode C

#include <C_CkEmailW.h>
#include <C_CkBinDataW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEmailW email;
    HCkBinDataW bd;

    success = FALSE;

    //  Demonstrates the GetAttachmentBd method, which copies an attachment's binary data into a
    //  BinData object.  The first attachment is at index 0.

    email = CkEmailW_Create();
    CkEmailW_putSubject(email,L"GetAttachmentBd example");

    CkEmailW_AddStringAttachment(email,L"notes.txt",L"Some notes stored in the attachment.");

    //  Copy the first attachment's binary data into a BinData object.
    bd = CkBinDataW_Create();
    success = CkEmailW_GetAttachmentBd(email,0,bd);
    if (success == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkEmailW_Dispose(email);
        CkBinDataW_Dispose(bd);
        return true;
    }

    wprintf(L"Attachment size (bytes) = %d\n",CkBinDataW_getNumBytes(bd));


    CkEmailW_Dispose(email);
    CkBinDataW_Dispose(bd);

    }