如何只允许我的C#控制台应用程序的号码输入？

Console.WriteLine("Enter the cost of the item");                           
         string input = Console.ReadLine();
        double price = Convert.Todouble(input);

你好,我想要键盘按钮,A-Z,括号,问号等被禁用.我想要它,如果你输入,它不会显示在控制台.我只想显示1-9号.这是在C#控制台应用程序.谢谢您的帮助！

解决方法

尝试这个代码片段

string _val = "";
Console.Write("Enter your value: ");
ConsoleKeyInfo key;

do
{
    key = Console.ReadKey(true);
    if (key.Key != ConsoleKey.Backspace)
    {
        double val = 0;
        bool _x = double.TryParse(key.KeyChar.ToString(),out val);
        if (_x)
        {
            _val += key.KeyChar;
            Console.Write(key.KeyChar);
        }
    }
    else
    {
        if (key.Key == ConsoleKey.Backspace && _val.Length > 0)
        {
            _val = _val.Substring(0,(_val.Length - 1));
            Console.Write("\b \b");
        }
    }
}
// Stops Receving Keys Once Enter is pressed
while (key.Key != ConsoleKey.Enter);

Console.WriteLine();
Console.WriteLine("The Value You entered is : " + _val);
Console.ReadKey();

原文地址：https://www.jb51.cc/csharp/93249.html