Question

我正试图想出一个快速解决方案来查找字符串中的部分。这是一个示例字符串：

“PostLoad成功！您将 17.00 Rs的金额转移到 03334224222 。现在通过拨打123使用PostLoad。短信上的PostLoad将于01-03-2011结束。”

目标：需要检索粗体值：金额和单元格编号。字符串内容略有变化，但单元格数字始终为11位数。金额始终为两位小数精度。任何使用C＃和RegEx的建议？

Answer 1

Regex regexObj = new Regex(@"(\b\d+\.\d{2}\b).*?(\b\d{11}\b)");
Match matchResults = regexObj.Match(subjectString);
while (matchResults.Success) {
    for (int i = 1; i < matchResults.Groups.Count; i++) {
        Group groupObj = matchResults.Groups[i];
        if (groupObj.Success) {
            // matched text: groupObj.Value
            // match start: groupObj.Index
            // match length: groupObj.Length
        } 
    }

<强>解释

(       # Match and capture the following:
 \b     # Assert that the match starts at a "word boundary"
 \d+    # Match one or more digits
 \.     # Match a .
 \d{2}  # Match exactly two digits
 \b     # Assert that the number ends here
)       # End of first capturing group
.*?     # Match any number of intervening characters; as few as possible
(       # Match and capture...
 \b     # Word boundary
 \d{11} # Exactly 11 digits
 \b     # Word boundary
)       # End of match

组＃1将包含十进制数字，组＃2将包含11位数字。

“单词边界”是字母数字字符和非字母数字字符之间的位置，因此它仅匹配“单词或数字”的开头或结尾。

这可确保12.3456之类的数字不会匹配;另一方面，数字必须用空格，标点符号或其他非alnum字符分隔。例如，在number12.34中，正则表达式与12.34不匹配。

Answer 2

这是对VB.Net的转换。我希望我做对了。

Dim regexObj As New Regex("(\b\d+\.\d{2}\b).*?(\b\d{11}\b)")
Dim matchResults As Match = regexObj.Match(lActualSenderMessage)

While matchResults.Success
    For i As Integer = 1 To matchResults.Groups.Count - 1
        Dim groupObj As Group = matchResults.Groups(i)
        ' matched text: groupObj.Value
        ' match start: groupObj.Index
        ' match length: groupObj.Length
        If groupObj.Success Then
        End If
    Next
End While

在字符串中搜索特定数字

2 个答案: