[英]How to extract first character and numbers after that until find a character (a-z) in a string - C# 2.0
How to extract numbers from a second index of a string until find a character (az) in a string?如何从字符串的第二个索引中提取数字直到在字符串中找到字符(az)?
I am using C# version 2.0 (can't upgrade for some reasons).我使用的是 C# 2.0 版(由于某些原因无法升级)。
Here are some examples;这里有些例子;
I have tried Regex("[^0-9]") which works if there is no character after digits (4th example)我试过 Regex("[^0-9]") 如果数字后没有字符(第四个例子)
"B" + regexOnlyNumbers.Replace(mystring, string.Empty);
You can use您可以使用
string text = "M000067TGFD45F";
Match m = Regex.Match(text, @"^[A-Z][0-9]+");
if (m.Success)
{
Console.WriteLine(m.Value);
}
See the regex demo .请参阅正则表达式演示。
Details细节
^
- start of string ^
- 字符串的开始[AZ]
- an uppercase ASCII letter [AZ]
- 一个大写的 ASCII 字母[0-9]+
- one or more ASCII digits. [0-9]+
- 一个或多个 ASCII 数字。 Alternatively, you might consider a ^[AZ][^AZ]+
pattern, where [^AZ]+
matches any one or more chars other than uppercase ASCII letters.或者,您可以考虑
^[AZ][^AZ]+
模式,其中[^AZ]+
匹配除大写 ASCII 字母之外的任何一个或多个字符。
To ignore case, use RegexOptions.IgnoreCase
: Regex.Match(text, @"^[AZ][0-9]+", RegexOptions.IgnoreCase)
.要忽略大小写,请使用
RegexOptions.IgnoreCase
: Regex.Match(text, @"^[AZ][0-9]+", RegexOptions.IgnoreCase)
。
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