名字和姓氏的第一个字母大写的问题

Question

我正在尝试将名字、中间名和姓氏的第一个字母大写。
我正在尝试使用 System.Globalization.TextInfo.ToTitleCase(newUser.Firstname) 但我在 Visual Studio 中收到错误消息“非静态字段需要对象引用，方法或属性”。帮我解决这个问题：

public static UserAccount CreateUser(string firstName, string middleName, string lastName, string nameSuffix, int yearOfBirth, int? monthOfBirth, int? dayOfBirth, string email, string password, UserRole roles, bool tosAccepted = false)
{
    var newUser = new UserAccount
    {
        CreationDate = DateTime.Now,
        ActivationCode = Guid.NewGuid(),
        FirstName = firstName,
        MiddleName = middleName,
        LastName = lastName,
        NameSuffix = nameSuffix,
        YearOfBirth = yearOfBirth,
        MonthOfBirth = monthOfBirth,
        DayOfBirth = dayOfBirth,
        Email = email,
        UserRoles = roles,
        ToSAccepted = tosAccepted
    };
    string newUsers= System.Globalization.TextInfo.ToTitleCase(newUser.FirstName);
    newUser.SetPassword(password);
    return newUser;
}

Answer 1

您可以调用CultureInfo.CurrentCulture.TextInfo.ToTitleCase 方法为您执行此操作：

CultureInfo.CurrentCulture.TextInfo.ToTitleCase(lastName)

Answer 2

ToTitleCase 是一个实例方法，因此您必须通过引用TextInfo 的实例来调用它。您可以像这样从当前线程的文化中获取TextInfo 的实例：

var textInfo = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo;

或者来自像这样的特定文化：

var textInfo = new CultureInfo("en-US",false).TextInfo;

此外，它会返回一个新字符串，而不是修改您传入的字符串。请尝试以下操作：

public static UserAccount CreateUser(string firstName, string middleName, string lastName, string nameSuffix, int yearOfBirth, int? monthOfBirth, int? dayOfBirth, string email, string password, UserRole roles, bool tosAccepted = false)
{
    var textInfo = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo;

    var newUser = new UserAccount
    {
        CreationDate = DateTime.Now,
        ActivationCode = Guid.NewGuid(),
        FirstName = textInfo.ToTitleCase(firstName),
        MiddleName = middleName,
        LastName = textInfo.ToTitleCase(lastName),
        NameSuffix = nameSuffix,
        YearOfBirth = yearOfBirth,
        MonthOfBirth = monthOfBirth,
        DayOfBirth = dayOfBirth,
        Email = email,
        UserRoles = roles,
        ToSAccepted = tosAccepted
    };
    newUser.SetPassword(password);
    return newUser;
}