C# 正则表达式查找和替换

Question

我正在尝试将所有出现的 Secured="*" 替换为 Secured="testValue"

int testValue = 9;
string text = "Test blah Secured=\"6\" Test blah Secured=\"3\" ";

 Regex r = new Regex("Secured=\".*\"  ");
text = r.Replace(text, "Secured=\" \" + newValue.toString() + \"\" ");

这是我的方法，问题是它没有任何变化吗？

    [Published]
    public string GetConvertedVdiXML(string myText, int newValue)
    {
        string text = myText;
        Regex r = new Regex("Secured=\".*\"  ");
        text = r.Replace(text, "Secured=\" " + newValue.ToString() + " \" ");

        return text;
    }

问题是它没有更新？

Answer 1

你应该使用

    text = r.Replace(text, "Secured=\" \"" + newValue.ToString() + "\" ");

因为newValue是一个变量。它不能是字符串的一部分。更新后的代码应该可以工作：

int newValue = 9;
string text = "Test blah Secured=\"6\" Test blah Secured=\"3\" ";
Regex r = new Regex(@"Secured=""[^""]*"" ");
text = r.Replace(text, "Secured=\"" + newValue.ToString() + "\" ");

输出：Test blah Secured="9" Test blah Secured="9"

另外，这里是函数代码：

public string GetConvertedVdiXML(string myText, int newValue)
{
    string text = myText;
    Regex r = new Regex(@"Secured=""[^""]*"" ");
    text = r.Replace(text, "EditableBy=\"" + newValue.ToString() + "\" ");
    return text;
}

C# 正则表达式查找和替换

C# Regex find and replace

c#

regex

string

replace