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June 15, 2007

C# to Convert iso-8859-1 to utf-8

Here’s a C# example program to convert from iso-8859-1 to utf-8:

	
           // Convert iso-8859-1 to utf-8.
	
            // C# strings are Unicode, so we must first get a byte
            // array containing iso-8859-1 bytes.
            System.Text.Encoding iso_8859_1 = System.Text.Encoding.GetEncoding("iso-8859-1");
            System.Text.Encoding utf_8 = System.Text.Encoding.UTF8;
	
            // This is our Unicode string:
            string s_unicode = "abcéabc";
	
            // Convert it to iso-8859-1 bytes
            byte[] isoBytes = iso_8859_1.GetBytes(s_unicode);
	
            // Convert the bytes to utf-8:
            byte[] utf8Bytes = System.Text.Encoding.Convert(iso_8859_1, utf_8, isoBytes);
	
            // Let's examine both byte arrays as hex strings.
            // We're using Chilkat.Crypt2 for simplicity...
            Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
            textBox1.Text = crypt.Encode(isoBytes, "hex");
            textBox2.Text = crypt.Encode(utf8Bytes, "hex");
	
            // The result is this:
            // isoBytes = 616263<strong>E9</strong>616263
            // utf8Bytes = 616263<strong>C3A9</strong>616263
	
            // The é character is 0xE9 in iso-8859-1, but is represented
            // as two bytes (0xC3 0xA9) in utf-8.


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