Question

我正在构建日历，我想检查用户输入是否是有效日期。我到目前为止，现在我不知道如何重复消息“无效日期”，直到它是有效的。

我的代码：

var dateFormats = new[] {"dd.MM.yyyy", "dd-MM-yyyy", "dd/MM/yyyy"};

Console.Write("\nSet your date: ");

string readAddMeeting = Console.ReadLine();
DateTime scheduleDate;

bool validDate = DateTime.TryParseExact(
    readAddMeeting,
    dateFormats,
    DateTimeFormatInfo.InvariantInfo,
    DateTimeStyles.None,
    out scheduleDate);

if (validDate)
{
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Valid date");
    Console.ForegroundColor = ConsoleColor.White;
}
else
{
    Console.ForegroundColor = ConsoleColor.Red;
    Console.WriteLine("Invalid date: \"{0}\"", readAddMeeting);
    Console.ForegroundColor = ConsoleColor.White;
}

Answer 1

使用do/while循环：

do
{
      ... your code here

}while(!validDate);

Answer 2

尝试类似：

Mat

Answer 3

使用do-While循环：

do{
var dateFormats = new[] {"dd.MM.yyyy", "dd-MM-yyyy", "dd/MM/yyyy"};

Console.Write("\nSet your date: ");

string readAddMeeting = Console.ReadLine();
DateTime scheduleDate;

bool validDate = DateTime.TryParseExact(
readAddMeeting,
dateFormats,
DateTimeFormatInfo.InvariantInfo,
DateTimeStyles.None,
out scheduleDate);

if (validDate)
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Valid date");
Console.ForegroundColor = ConsoleColor.White;
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Invalid date: \"{0}\"", readAddMeeting);
Console.ForegroundColor = ConsoleColor.White;
}
}while(!validDate)

检查用户输入是否为有效日期

3 个答案: