替换字符串。替换为Regex.Replace

OLD:

旧:

private string Check_long(string input)
{
    input = input.Replace("cool", "supercool");
    input = input.Replace("cool1", "supercool1");
    input = input.Replace("cool2", "supercool2");
    input = input.Replace("cool3", "supercool3");
    return input;
}

NEW:

新:

private string Check_short(string input)
{    
    input = Regex.Replace(input, "cool", "supercool", RegexOptions.IgnoreCase);
    input = Regex.Replace(input, "cool1", "supercool1", RegexOptions.IgnoreCase);
    input = Regex.Replace(input, "cool2", "supercool2", RegexOptions.IgnoreCase);
    input = Regex.Replace(input, "cool3", "supercool3", RegexOptions.IgnoreCase);
    return input;
}

The old solution with String.Replace was working just fine. But it didn't support case-insensitivity. So I had to check for Regex.Replace, but now it won't work. Why is that ?

用字符串表示的旧溶液。替换工作还不错。但它不支持病例敏感性。所以我必须检查Regex。替换，但现在不行。这是为什么呢?

3 个解决方案

#1

Your new code should work fine. Note that you can also retain the case of your input using a capture group:

你的新代码应该没问题。注意，您还可以使用捕获组保留输入的情况:

private string Check_short(string input)
{    
    return Regex.Replace(input, "(cool)", "super$1", RegexOptions.IgnoreCase);
}

#2

working fine here:

在这里工作正常:

        string input = "iiii9";
        input = Regex.Replace(input, "IIII[0-9]", "jjjj" , RegexOptions.IgnoreCase);
        label1.Text = input;

output

输出

jjjj

#3

-2

Regex do not work the say way that string.replace does. You need to build the regex around what you are trying to filter for.

Regex不会以那个字符串的方式工作。取代。您需要围绕您要筛选的内容构建regex。

private string Check_short(string input)
{    
    input = Regex.Replace(input, ".*(cool).*", "supercool", RegexOptions.IgnoreCase);
    return input;
}

#1