有效文本的正則表達式

Question

我試圖創建一個驗證的正則表達式！

1. 如果文本僅包含特殊字符或空格，則應驗證false ...

例如：@＃$ ##

1. 如果結尾處帶有一些文本和特殊字符，則應返回true ...

EX：測試！

1. 如果以空格或以外的特殊字符開頭。 它應該驗證為false。

例如：@＃Test

1. 如果除空格或逗號以外的特殊字符介於兩者之間。 它應該驗證為假！

例如：te＃$ sT

抱歉，對於這個復雜的正則表達式，我的知識不允許我放置任何嘗試的代碼。 因為除了[ab AB !@#$%^&*()]我一無所有

UPDATE

1. 用Fischermaen的答案進行測試-^（\\ s | \\ w）\\ w * \\ W * $

SDF SDF！ ：驗證為假

_ __ ：驗證為真實（得分以下）

sadf，sdfsdf ：驗證為false

空白：驗證為true

Answer 1

嘗試這個：

foundMatch = Regex.IsMatch(subjectString, @"^(?!\W*$)(?=[ .\w]\w*\W*$).*$");

我很想知道你的意思。 您必須學會更好地表達自己。

說明：

"
^            # Assert position at the beginning of the string
(?!          # Assert that it is impossible to match the regex below starting at this position (negative lookahead)
   \W        # Match a single character that is a “non-word character”
      *      # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   $         # Assert position at the end of the string (or before the line break at the end of the string, if any)
)
(?=          # Assert that the regex below can be matched, starting at this position (positive lookahead)
   [ .\w]    # Match a single character present in the list below
             # One of the characters “ .”
             # A word character (letters, digits, etc.)
   \w        # Match a single character that is a “word character” (letters, digits, etc.)
      *      # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   \W        # Match a single character that is a “non-word character”
      *      # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   $         # Assert position at the end of the string (or before the line break at the end of the string, if any)
)
.            # Match any single character that is not a line break character
   *         # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
$            # Assert position at the end of the string (or before the line break at the end of the string, if any)
"

Answer 2

這是我對您的建議：

^(\s|\w)\w*\W*$

說明：

^(\s|\w) the first character has to be a whitespace or a alphanumeric (including underscore)

\w*      followed by any number of alphanumeric (including underscore)

\W*$     at the end of the string any number of any *except* alphanumeric characters are allowed.

Answer 3

據我了解，您只想接受包含一些字母和一些特殊字符的字符串。 所以像這樣：

[(a-zA-Z)+(\!\@\#\$\%\^\&\*\(\))+]