PowerShell

Demonstrate the Global.AutoQBDecode property

The Global.AutoQBDecode property can be set to _TRUE_ to cause Q/B encoded string arguments passed to any Chilkat method to be automatically decoded before being used.

Note: This example requires Chilkat v10.0.0 or later.

PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

# Turn on auto Q/B decoding for all strings passed to any Chilkat method in any Chilkat class.
$glob = New-Object Chilkat.Global
$glob.AutoQBDecode = $true

# ---------------------------------------------------------------------------------------------------------------------------------------------
# "Q" Encoding

# Quoted-Printable encoding is primarily used for text that is mostly ASCII with some non-ASCII characters. 
# It encodes these characters in a way that remains mostly readable and compatible with ASCII-only systems.

# How It Works with UTF-8:
# - ASCII characters (except special characters like `=`) are encoded as themselves.
# - Non-ASCII characters are represented by their UTF-8 byte values, each byte encoded as `=` followed by two hexadecimal digits. 
#   For example, the UTF-8 character "é" (U+00E9) is encoded as `=C3=A9`.

# For example, consider the text "Café" encoded in UTF-8. The UTF-8 bytes for "é" are `C3 A9`, so in Quoted-Printable, it looks like this:  Caf=C3=A9

# The "Q" encoding has this syntax:  "=?charset?q?encoded_text?="
# For example: "=?UTF-8?Q?Caf=C3=A9_announcement?="

# ------
# "B" Encoding

# Base64 encoding is used to encode non-ASCII text, making it more suitable for text with a high density of non-ASCII characters, such as those found in non-Western European languages.

# For example, consider the text "こんにちは" ("Hello" in Japanese).
# The "B" encoded string would be "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="

# ------
# Q encoding is suitable for text that is mostly ASCII.
# B Encoding is best for text that is densely packed with non-us-ascii chars, such as non-Latin (Asian) languages.
# ---------------------------------------------------------------------------------------------------------------------------------------------

# You can use Chilkat's online tool at Online Binary Encoder to pre-encode your literal strings before
# inserting them into your source code.

# When using the online tool, choose either "MIME header Q Encoding" or "MIME Header B Encoding".

# For example:
$s_cafe = "=?utf-8?Q?Caf=C3=A9?="
$s1 = New-Object Chilkat.StringBuilder
$s1.Append($s_cafe)
$($s1.GetAsString())
# Output is Café

$s_hello = "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="
$s2 = New-Object Chilkat.StringBuilder
$s2.Append($s_hello)
$($s2.GetAsString())
# Output is こんにちは