看起来您原来在正确的轨道上并带有注释掉的行.使用Replace方法不需要循环匹配(这是Global标志的作用)，并且可以使用诸如$1，$2等的反向引用作为匹配子字符串的占位符.与大多数语言一样，关于VBScript的Regular-Expressions.info上的专用页面. /p>

以下内容可满足您的需求:

body = "Blah blah ASA3422df ASA2389ds ASA1265sa"
body = RegX.Replace(body, "<a href='http://www.code.com/$1'>$1</a>")
Debug.Print body 
'-> Blah blah <a href='http://www.code.com/ASA3422df'>ASA3422df</a> <a href='http://www.code.com/ASA2389ds'>ASA2389ds</a> <a href='http://www.code.com/ASA1265sa'>ASA1265sa</a>

这将匹配项(仅匹配项 )替换为链接，并保持所有其他内容不变.

I am trying to replace text in the body with pattern ASA####@@ to ASA####@@(hyperlink)

I have code which works if there is only one pattern in the body.

But if I have many patterns like

ASA3422df
ASA2389ds
ASA1265sa

the entire body gets replaced to

ASAhuyi65

My code is here.

Dim strID As String
Dim Body As String
Dim objMail As Outlook.MailItem
Dim temp As String
Dim RegExpReplace As String
Dim RegX As Object
strID = MyMail.EntryID

Set objMail = Application.Session.GetItemFromID(strID)
Body = objMail.HTMLBody
Body = Body + "Test"
objMail.HTMLBody = Body

Set RegX = CreateObject("VBScript.RegExp")
With RegX
.Pattern = "ASA[0-9][0-9][0-9][0-9][a-z][a-z]"
.Global = True
.IgnoreCase = Not MatchCase
End With
'RegExpReplace = RegX.Replace(Body, "http://www.code.com/" + RegX.Pattern + "/ABCD")

'if the replacement is longer than the search string, future .FirstIndexes will be off
Offset = 0
'Set matches = RegX.Execute(Body)

For Each m In RegX.Execute(Body)
    RegExReplace = "<a href=""http://www.code.com/" & m.Value & """>" & m.Value & "</a>"
Next

Set RegX = Nothing
objMail.HTMLBody = RegExReplace
objMail.Save
Set objMail = Nothing
End Sub

It looks like you were on the right track originally with that commented-out line. With the Replace method don't need to loop over matches (that's what the Global flag is for), and can use backreferences like $1, $2, etc. as placeholders for matching substrings. As with most languages, there's a dedicated page on Regular-Expressions.info for VBScript.

The following with do what you're looking for:

body = "Blah blah ASA3422df ASA2389ds ASA1265sa"
body = RegX.Replace(body, "<a href='http://www.code.com/$1'>$1</a>")
Debug.Print body 
'-> Blah blah <a href='http://www.code.com/ASA3422df'>ASA3422df</a> <a href='http://www.code.com/ASA2389ds'>ASA2389ds</a> <a href='http://www.code.com/ASA1265sa'>ASA1265sa</a>

This replaces the matches (and only the matches) with a link, and leaves everything else untouched.