vb.net如何检查一个字符串是否有某个字

Question

我想检查一个字符串是否与数组中的某个字匹配，而不仅仅是匹配字符。 contains方法只检查匹配字符而不是整个单词。这里是我的代码：

Dim builder As New StringBuilder() 
    Dim reader As New StringReader(txtOCR.Text) 
    Dim titles() As String = {"the", "a", "an", "of"} 
    Dim regex As New Regex(String.Join("|", titles), RegexOptions.IgnoreCase) 

    While True 
     Dim line As String = reader.ReadLine() 
     If line Is Nothing Then Exit While 
     Dim WordCount = New Regex("\w+").Matches(line).Count 

     If WordCount = 1 And Not line.ToLower().Contains("by") Then 
      builder.AppendLine(line) 
     ElseIf regex.IsMatch(line) Then 
      builder.AppendLine(line) 
     End If 

    End While 
    txtTitle.Text = builder.ToString() 

Answer 1

您可以使用单词边界\b包围的单个单词：

New Regex("\b" & String.Join("\b|\b", titles) & "\b")