如何阻止程序在C＃中进一步执行 [英] How to stop program executing further in C#

问题描述

string FirstName = Console.ReadLine();
            if (FirstName.Length > 12)
            {
                Console.WriteLine(".......................................");
            }
            if(FirstName.Length<3)
            {
                Console.WriteLine("....................");
            }
            Console.WriteLine("...................");
            string SecondName = Console.ReadLine();
            if (SecondName.Length > 12)
            {
                Console.WriteLine(".............................");
            }
            if(SecondName.Length<3)
            {

我想，如果他们按没有把一个值进入停止程序，该怎么办呢？/？

I want to stop the program if they press enter without putting a value,how to do it??/?

推荐答案

我想你想有一个非空字符串值从控制台输入，如果输入为空，则希望终止应用程序。使用下面的代码：

I think you want to have a non empty string value as an input from console and if input is empty then want to terminate your application. Use following code:

Console.WriteLine("Enter a value: ");
string str = Console.ReadLine();
//If pressed enter here without a  value or data, how to stop the  program here without
//further execution??
if (string.IsNullOrWhiteSpace(str))
  return;
else
{
  Console.WriteLine(string.Format("you have entered: '{0}'", str));
  Console.Read();
}

如果用户输入任何类型的空字符串或空格的，应用程序将被终止的那一刻，他/她会按enter键。

If user will enter any kind of empty string or white spaces, the application will be terminated the moment he/she will press enter.

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