我想在两个命名的捕获组之间的特定位置插入一个美元符号.问题是,这意味着两个紧跟在替换字符串中的美元符号之后会导致问题.
我如何使用Replace-method直接执行此操作？我只是通过添加一些我立即删除的临时垃圾找到了一种解决方法.
请参阅问题的代码：
// We want to add a dollar sign before a number and use named groups for capturing;
// varying parts of the strings are in brackets []
// [somebody] has [some-dollar-amount] in his [something]
string joeHas = "Joe has 500 in his wallet.";
string jackHas = "Jack has 500 in his pocket.";
string jimHas = "Jim has 740 in his bag.";
string jasonHas = "Jason has 900 in his car.";
Regex dollarInsertion = new Regex(@"(?<start>^.*? has )(?<end>\d+ in his .*?$)",RegexOptions.Multiline);
Console.WriteLine(joeHas);
Console.WriteLine(jackHas);
Console.WriteLine(jimHas);
Console.WriteLine(jasonHas);
Console.WriteLine("--------------------------");
joeHas = dollarInsertion.Replace(joeHas,@"${start}$${end}");
jackHas = dollarInsertion.Replace(jackHas,@"${start}$-${end}");
jimHas = dollarInsertion.Replace(jimHas,@"${start}\$${end}");
jasonHas = dollarInsertion.Replace(jasonHas,@"${start}$kkkkkk----kkkk${end}").Replace("kkkkkk----kkkk","");
Console.WriteLine(joeHas);
Console.WriteLine(jackHas);
Console.WriteLine(jimHas);
Console.WriteLine(jasonHas);
Output:
Joe has 500 in his wallet.
Jack has 500 in his pocket.
Jim has 740 in his bag.
Jason has 900 in his car.
--------------------------
Joe has ${end}
Jack has $-500 in his pocket.
Jim has \${end}
Jason has $900 in his car.
