Question

我想从html提取文本。我已经通过webrequest获得了html源。

如何像下面的示例一样提取文本？

class="btn btn-success btn-lg" href="I wanto to get this link that is changing every time" rel="nofollow noopener">Click</a><

我可以使用子字符串方法（例如startwith和end with）吗？谢谢

Answer 1

因此，我使用string.indexof找到了一个解决方案。 html字符串中的那些“”让我有点挣扎，但这现在可以完成它应该做的事情。

我找到了解决方法！

 Dim allinputtext As String = RichTextBox1.Text
    Dim textafter As String = """ rel=""nofollow noopener"
    Dim textbefore As String = "class=""btn btn-success btn-lg"" href="""
    Dim startPosition As Integer = allInputText.IndexOf(textBefore)

    'If text before was not found, return Nothing
    If startPosition < 0 Then

    End If

    'Move the start position to the end of the text before, rather than the beginning.
    startPosition += textBefore.Length

    'Find the first occurrence of text after the desired number
    Dim endPosition As Integer = allInputText.IndexOf(textAfter, startPosition)

    'If text after was not found, return Nothing
    If endPosition < 0 Then

    End If

    'Get the string found at the start and end positions
    Dim textFound As String = allInputText.Substring(startPosition, endPosition - startPosition)
    TextBox4.Text = (textFound)

使用子字符串方法从html提取文本

1 个答案: