如何将几个正则表达式用于一个方法，C＃ [英] How to use several regex into a method , C#

问题描述

我想为我的应用程序使用几个正则表达式，在阅读源文本文件中的所有行后，只写入包含student-s数据的行。之后我还要删除一些字符并拆分:(成员12569是学生 - 12 * 01 * 2006）分为5个字段，如下所示：



输入文本文件

表格| 01; 23_anna-会员12569是学生 - 12 * 01 * 2006

表格| 02; 17_smith_会员12570是老师 - 13 * 01 * 2007

表格| 03; 12_ben_会员12571是学生 - 14 * 01 * 2007



到目前为止在输出文件上打印的内容：

表格| 01; 23_anna-会员12569是学生 - 12 * 01 * 2006

表格| 03; 12_ben_会员12571是学生 - 14 * 01 * 2007



我想要的输出：

Form01 anna 12569学生12 01 2006

Form03 ben 12571学生14 01 2007



我尝试过：



StreamReader file = new StreamReader（inputfilepath）;

List< string> student = new List< string>（）;

while（file.EndOfStream！= true）

{

s = file.ReadLine（） ;

匹配m = Regex.Match（s，（？< = student）（。）+）;

if（m.Success）

{



inactive.Add（s）;



}



}





使用（StreamWriter writer = new StreamWriter（outputfilepath））

{



foreach（学生中的字符串l）



{







writer.WriteLine（l）;

// l = l。替换（ - ，）。替换（;，）。替换（_，）。替换（|，）;

I want to use several regex for my app, after reading all lines from source text file, writes only lines which contain data for the student-s.After this I want also to remove some characters and to split: (Member 12569 is student - 12*01*2006) into 5 fields as shown below:

input text file
Form|01; 23_anna- Member 12569 is student - 12*01*2006
Form|02; 17_smith_ Member 12570 is teacher - 13*01*2007
Form|03; 12_ben_ Member 12571 is student - 14*01*2007

what is printed on output file till now:
Form|01; 23_anna- Member 12569 is student - 12*01*2006
Form|03; 12_ben_ Member 12571 is student - 14*01*2007

The output I want:
Form01 anna 12569 student 12 01 2006
Form03 ben 12571 student 14 01 2007

What I have tried:

StreamReader file = new StreamReader(inputfilepath);
List<string> student = new List<string>();
while (file.EndOfStream != true)
{
s = file.ReadLine();
Match m = Regex.Match(s, "(?<=student)(.)+");
if (m.Success)
{

inactive.Add(s);

}

}


using (StreamWriter writer = new StreamWriter(outputfilepath))
{

foreach (string l in student)

{



writer.WriteLine(l);
//l = l.Replace("-", "").Replace(";", "").Replace("_", "").Replace("|", "");

推荐答案

你可以在一个正则表达式中完成：

You can do it in a single regex:

private Regex find = new Regex(@"^(.+?)(?:\|)(\d+)(?:.+?_)(.+?)(?:[_-] Member ?)(\d+)(?:.+?)(student)(?:.+?)(\d\d).(\d\d).(\d\d\d\d)

，RegexOptions.Multiline）;
private void MyButton_Click（ object sender，EventArgs e）
{
string sample = 表格| 01; 23_anna-会员12569是学生 - 12 * 01 * 2006 \ nForm | 02; 17_smith_会员12570是老师 - 13 * 01 * 2007 \ nForm | 03; 12_ben_会员12571是学生 - 14 * 01 * 2007;
MatchCollection matches = find.Matches（sample）;
foreach （匹配m 匹配）
{
控制台。 WriteLine（ {0} {1} {2} {3}为{4} {5} {6} { 7}，m。Groups [ 1 ]，m .Groups [ 2 ]， m.Groups [ 3 ]，m .Groups [ 4 ]，m .Groups [ 5 ]，m .Groups [ 6 ]，m .Groups [ 7 ]，m .Groups [ 8 ]）;
}
Console.WriteLine（）;

", RegexOptions.Multiline); private void MyButton_Click(object sender, EventArgs e) { string sample = "Form|01; 23_anna- Member 12569 is student - 12*01*2006\nForm|02; 17_smith_ Member 12570 is teacher - 13*01*2007\nForm|03; 12_ben_ Member 12571 is student - 14*01*2007"; MatchCollection matches = find.Matches(sample); foreach (Match m in matches) { Console.WriteLine("{0}{1} {2} {3} is {4} {5} {6} {7}", m.Groups[1], m.Groups[2], m.Groups[3], m.Groups[4], m.Groups[5], m.Groups[6], m.Groups[7], m.Groups[8] ); } Console.WriteLine();

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