用Regex.Replace替换String.Replace

Question

老:

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;
}

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;
}

旧的解决方案String.Replace工作得很好.但它不支持不区分大小写.所以我必须检查Regex.Replace,但现在它将无法正常工作.这是为什么 ？

Answer 1

您的新代码应该可以正常工作.请注意,您还可以使用捕获组保留输入的大小写:

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

Answer 2

在这里工作正常:

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

产量

jjjj