VB.NET - Regex.Replace首字母大寫的句子

Question

我想用同一個單詞的大寫版本替換任何特定單詞的出現。

代碼：

Dim Sentence As String = "select * from table where field = 1" 
Dim Words As New List(Of String)({"SELECT", "FROM", "UPDATE", "WHERE"}) 

For Each w As String In Words 
    Sentence = Regex.Replace(Sentence, "??", w, RegexOptions.IgnoreCase) 
loop 

你也許能看到我這個去...

Here is reference for Regex.Replace，但我無法弄清楚。

編輯：我只希望替換開始/「字」用空格或斷行或開始/文件的末尾結束。所以像這樣：^m?(word)$m?？

Answer 1

明白了 - 只需使用\b來表示任何空格或換行字符的單詞的兩端：

Dim Sentence As String = "select * from table where field = 1" 
Dim Words As New List(Of String)({"SELECT", "FROM", "UPDATE", "WHERE"}) 

For Each w In Words 
    Sentence = Regex.Replace(Sentence, "\b(" & w & ")\b", w, RegexOptions.IgnoreCase) 
Loop 

Answer 2

你可以簡單地用你的話的模式和替代：

For Each w As String In Words 
    Sentence = Regex.Replace(Sentence, w, w, RegexOptions.IgnoreCase) 
Next 

但要注意的是，這並不如取空白或引用文字;所以根據你的實際使用情況，這可能會或可能不適合你。

---

這裏有一個更高級的正則表達式：

Dim Sentence As String = "select * from table where field = 'fooselectfar foo select foo' " 
Dim Words As New List(Of String)({"SELECT", "FROM", "UPDATE", "WHERE"}) 

For Each w As String In Words 
    Sentence = Regex.Replace(Sentence, "(^|(?<=\W))" & w & "(?=\W)(?=([^']*'[^']*')*[^']*$)", w, RegexOptions.IgnoreCase) 
Next 

Sentence現在SELECT * FROM table WHERE field = 'fooselectfar foo select foo'。