Unicode C
Controlling Charset of HTML Email

This example demonstrates how to change the charset of an HTML email by setting the Charset property.
Chilkat Unicode C Downloads

Unicode C
#include <C_CkEmailW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkMailManW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEmailW email;
    HCkStringBuilderW sbHtml;
    HCkMailManW mailman;

    success = FALSE;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    email = CkEmailW_Create();

    // Tell Chilkat you want the email to be utf-8.
    CkEmailW_putCharset(email,L"utf-8");

    CkEmailW_putFrom(email,L"somebody@gmail.com");
    CkEmailW_AddTo(email,L"Joe",L"joe_somebody@gmail.com");
    CkEmailW_putSubject(email,L"This is a test");

    // Load a utf-8 HTML file that will be the body of this email.
    // The HTML contains this line to specify the charset:
    // 
    //     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    // 
    // The sample HTML is available here:  https://chilkatsoft.com/exampleData/sample_utf8.html
    // 
    sbHtml = CkStringBuilderW_Create();
    CkStringBuilderW_LoadFile(sbHtml,L"qa_data/html/sample_utf8.html",L"utf-8");

    CkEmailW_SetHtmlBody(email,CkStringBuilderW_getAsString(sbHtml));

    // If this email was sent as-is, it would look like this:
    mailman = CkMailManW_Create();
    wprintf(L"%s\n",CkMailManW_renderToMime(mailman,email));

    // The MIME that would be sent is this:

    // 	MIME-Version: 1.0
    // 	Date: Wed, 08 Mar 2017 09:39:06 -0600
    // 	Message-ID: <53930EB7EFA37B121FB2CC0E57E9FA4D02AD86A3@CHILKAT13>
    // 	Content-Type: text/html; charset=utf-8
    // 	Content-Transfer-Encoding: quoted-printable
    // 	X-Priority: 3 (Normal)
    // 	From: somebody@gmail.com
    // 	To: Joe <joe_somebody@gmail.com>
    // 	Subject: This is a test
    // 
    // 	<html>
    // 	<head>
    // 	<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" />
    // 	</head>
    // 	<body>
    // 	<p>=C3=A0=C3=A8=C3=AC=C3=B2=C3=B9=C3=80=C3=88=C3=8C=C3=92=C3=99=C3=A1=C3=A9=
    // 	=C3=AD=C3=B3=C3=BA=C3=BD=C3=81=C3=89=C3=8D=C3=93=C3=9A=C3=9D=C3=A2=C3=AA=C3=
    // 	=AE=C3=B4=C3=BB=C3=82=C3=8A=C3=8E=C3=94=C3=9B=C3=A3=C3=B1=C3=B5=C3=83=C3=91=
    // 	=C3=95=C3=A4=C3=AB=C3=AF=C3=B6=C3=BC=C3=BF=C3=84=C3=8B=C3=8F=C3=96=C3=9C=C5=
    // 	=B8=C3=A5=C3=85</p>
    // 	</body>
    // 	</html>
    // 

    // -----------------------------------------
    // Let's say we want to send iso-8859-1 instead...
    // Just set the email object's Charset property, like this:
    CkEmailW_putCharset(email,L"iso-8859-1");

    // Now see what would be sent:
    wprintf(L"%s\n",CkMailManW_renderToMime(mailman,email));

    // 	MIME-Version: 1.0
    // 	Date: Wed, 08 Mar 2017 09:45:03 -0600
    // 	Message-ID: <DD08A5B56532AF11505ACF21A1338E0A3024D34A@CHILKAT13>
    // 	Content-Type: text/html; charset=iso-8859-1
    // 	Content-Transfer-Encoding: quoted-printable
    // 	X-Priority: 3 (Normal)
    // 	From: somebody@gmail.com
    // 	To: Joe <joe_somebody@gmail.com>
    // 	Subject: This is a test
    // 
    // 	<html>
    // 	<head><META http-equiv=3D"Content-Type" content=3D"text/html;charset=3Diso-=
    // 	8859-1">
    // 
    // 	</head>
    // 	<body>
    // 	<p>=E0=E8=EC=F2=F9=C0=C8=CC=D2=D9=E1=E9=ED=F3=FA=FD=C1=C9=CD=D3=DA=DD=E2=EA=
    // 	=EE=F4=FB=C2=CA=CE=D4=DB=E3=F1=F5=C3=D1=D5=E4=EB=EF=F6=FC=FF=C4=CB=CF=D6=DC=
    // 	=9F=E5=C5</p>
    // 	</body>
    // 	</html>

    // -----------------------------------------
    // Let's say we don't want quoted-printable, but instead want 8bit.
    // The AddHeaderField method replaces the header field if it already exists.
    // Do this to get 8bit encoding instead of quoted-printable.
    CkEmailW_AddHeaderField(email,L"Content-Transfer-Encoding",L"8bit");
    // Now see what would be sent:
    // (Note: Because RenderToMime returns a string, it generally not possible to render MIME to a string
    // IF the MIME contains binary data and uses the 8bit encoding (for example, if a JPEG image was attached).  
    // However, the email would still be sent correctly.)
    wprintf(L"%s\n",CkMailManW_renderToMime(mailman,email));

    // 	MIME-Version: 1.0
    // 	Date: Wed, 08 Mar 2017 09:51:33 -0600
    // 	Message-ID: <F38B4A8D33C111057E901782305E01AC5BE31B98@CHILKAT13>
    // 	Content-Type: text/html; charset=iso-8859-1
    // 	Content-Transfer-Encoding: 8bit
    // 	X-Priority: 3 (Normal)
    // 	From: somebody@gmail.com
    // 	To: Joe <joe_somebody@gmail.com>
    // 	Subject: This is a test
    // 
    // 	<html>
    // 	<head><META http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
    // 
    // 	</head>
    // 	<body>
    // 	<p>àèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸåÅ</p>
    // 	</body>
    // 	</html>
    // 


    CkEmailW_Dispose(email);
    CkStringBuilderW_Dispose(sbHtml);
    CkMailManW_Dispose(mailman);

    }