我试图在VBA Excel中将JPG图像编码为Base64格式的HTML (<img src="data:image/jpg .." />)。
我发现了一个类似的问题，Convert image (jpg) to base64 in Excel VBA?，并尝试了代码：

'https://stackoverflow.com/questions/2043393/convert-image-jpg-to-base64-in-excel-vba
Sub EncodeFile()

Dim strPicPath: strPicPath = "MyDriveHere:\SomePath\image.jpg" 
'Credit to Wikipedia for orange picture:    'https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Citrus_reticulata_April_2013_Nordbaden.JPG/220px-Citrus_reticulata_April_2013_Nordbaden.JPG
Const adTypeBinary = 1          ' Binary file is encoded

' Variables for encoding
Dim objXML
Dim objDocElem

' Variable for reading binary picture
Dim objStream

' Open data stream from picture
Set objStream = CreateObject("ADODB.Stream")
objStream.Type = adTypeBinary
objStream.Open
objStream.LoadFromFile (strPicPath)

' Create XML Document object and root node
' that will contain the data
Set objXML = CreateObject("MSXml2.DOMDocument")
Set objDocElem = objXML.createElement("Base64Data")
objDocElem.DataType = "bin.base64"

' Set binary value
objDocElem.nodeTypedValue = objStream.Read()

' Get base64 value
Debug.Print objDocElem.text

' Clean all
Set objXML = Nothing
Set objDocElem = Nothing
Set objStream = Nothing

End Sub

使用这里的图像，https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Citrus_reticulata_April_2013_Nordbaden.JPG/220px-Citrus_reticulata_April_2013_Nordbaden.JPG
输出以
2ESk9uWHSmQ6ayKMjmX1FWRYG5BkERRkgK9qYbqyHKTijDQc
但它应该以
/9j/4AAQSkZJRgABAQUS ASABIAAD//g
代码的输出也没有在www. example上生成任何图像 www.example.com
为什么生成的输出提供的编码与标准Base64编码不同？