正則表達式：捕獲行之間的文本，其中包括換行符，空格和下划線字符

Question

我有一些文本取自pdf文件，並讀入了一個字符串：

...

Fabric Business Of the Cloths 

4 Description of the property being purchased 
______________________________________________________________________________

...

我想提取4 Description of the property being purchased的第4 Description of the property being purchased行4 Description of the property being purchased之前的單詞，而不要提取其上方或下方的下划線。

我嘗試使用正則表達式/^[^4]*/但這返回null。

什么是實現上述目標的合適正則表達式？

謝謝。

Answer 1

您的regex表達式有效，只需刪除開頭和結尾的/。

例

    private void TestRegex()
    {
        string s = "...\n Fabric Business Of the Cloths\n                         4 Description of the property being purchased\n____________________________________________________________________________\n ...";
        Regex regex = new Regex("^[^4]*"); // <--- DO LIKE THIS, PERHAPS.
        //Regex regex = new Regex("/^[^4]*/"); <----NOT THIS
        Match match = regex.Match(s, 0);
        if (match.Success)
        {
            Console.WriteLine(match.Value);
        }
    }

輸出值

...
 Fabric Business Of the Cloths