Question

所以我试图将正则表达式结果放入列表中。

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

我正在努力的名单。

 Regex regex = new Regex(@"RESPONSIVE\.constant\.user = {(?<userParams>.*?)}", RegexOptions.ExplicitCapture | RegexOptions.IgnoreCase | RegexOptions.Singleline);

                        Match match = regex.Match(text);

                        if (match.Success)
                        {
                            // Split up the values using comma
                            var keyValuePairs = match.Groups["userParams"].Value.Split(',');

                            // Split up each line using : as delimeter and clean up both sides, removing whitespace and single quote characters
                            var dict = keyValuePairs
                                .Select(kvp => kvp.Split(':'))
                                .ToDictionary(kvp => kvp[0].Trim(), kvp => kvp[1].Trim().Trim(new char[] { '\'' }));

                            // Read name
                            var name = dict["name"];
                            usernames.Add(name);
                        }

是我想要做的但是我收到以下错误：

Warning CS0649  Field 'Form1.usernames' is never assigned to, and will always have its default value null

Answer 1

事实上，这是一个警告，而不是错误。而不是

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

写

usernames = new List<string>();

此警告显示在以下类中：

public class MyClass 
{
    List<string> list; 
    public MyClass()
    {   
    } 
}

或

public class MyClass 
{
    List<string> list; 
    public MyClass()
    {
        List<string> list = new List<string>();
    } 
}

但不是这一个：

public class MyClass 
{
    List<string> list; 
    public MyClass()
    {
        list = new List<string>();
    } 
}

试图在字符串列表中添加项目错误

1 个答案: