Question

在我的窗口应用程序中，我想从一个句子中找到确切的单词。这两个字段分别是文本框（单词）和richtextbox（句子）。

我使用了Str（i）.contains（word）和For Each match As Regex.Matches（str（i），word）。

但是这两个词并没有得到确切的词。例如，字：吃句子：parfaite ment aux exigences cre * ate *évolutivesdumarchédaujourd hui

在上面它取得了创造中的赌注。但我需要集中注意力而不是合并。

Answer 1

在Regex.Matches中，您需要使用\ b字边界字符。我刚刚在C＃中编写了一个示例代码，现在我注意到你的问题是针对VB.NET的，所以我将添加两个代码示例：

<强> C＃：

        //Example 1:
        var testString = "parfaite ment aux exigences create évolutives du marché d aujourd hui";
        var pattern = "ate";
        MatchCollection found = Regex.Matches(testString, @"\b" + pattern + @"\b");

        if (found.Count > 0)
        {
            foreach (Match f in found)
            {
                Console.WriteLine("'{0}' found at position {1} in given testString.", f.Value, f.Index);
            }
        }
        else Console.WriteLine("No matches in given testString.");


        //Example 2:
        var testString1 = "parfaite ment aux exigences cre*ate* évolutives du marché d aujourd hui I don't know the language but this: ate and the last one should be found: ate!";
        var pattern1 = "ate";
        MatchCollection found1 = Regex.Matches(testString1, @"\b" + pattern1 + @"\b");

        if (found1.Count > 0)
        {
            foreach (Match f in found1)
            {
                Console.WriteLine("'{0}' found at position {1} in given testString1.", f.Value, f.Index);
            }
        }
        else Console.WriteLine("No matches in given testString1.");

        Console.ReadLine();

<强> VB.NET：

    'Example 1:
    Dim testString = "parfaite ment aux exigences create évolutives du marché d aujourd hui"
    Dim pattern = "ate"
    Dim found As MatchCollection = Regex.Matches(testString, "\b" & pattern & "\b")

    If found.Count > 0 Then
        For Each f In found
            Console.WriteLine("'{0}' found at position {1} in given testString.", f.Value, f.Index)
        Next
    Else
        Console.WriteLine("No matches in given testString.")
    End If

    'Example 2:
    Dim testString1 = "parfaite ment aux exigences cre*ate* évolutives du marché d aujourd hui I don't know the language but this: ate and the last one should be found: ate!"
    Dim pattern1 = "ate"
    Dim found1 As MatchCollection = Regex.Matches(testString1, "\b" & pattern1 & "\b")

    If (found1.Count > 0) Then

        For Each f As Match In found1
            Console.WriteLine("'{0}' found at position {1} in given testString1.", f.Value, f.Index)
        Next
    Else
        Console.WriteLine("No matches in given testString1.")
    End If

    Console.ReadLine()

Answer 2

也许这会有所帮助？

Private Sub SearchForWord()
    Dim SearchString() As String = Split("ate parfaite ment aux exigences cre*ate* évolutives du marché d aujourd hui", " ")
    Dim WordToFind As String = "ate"
    Dim count As Integer = 0
    Dim NumMatches As Integer = 0

    Do Until count = UBound(SearchString)
        If UCase$(WordToFind) = UCase$(SearchString(count)) Then
            NumMatches = NumMatches + 1
        End If
        count = count + 1
    Loop

    Debug.Print(Format(NumMatches))

End Sub

如何从句子中找到确切的单词

2 个答案: