Question

我得到了：

公共类
中需要公共Main（）方法

运行此脚本时出现

错误：

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

public class Program {
 public static void Main(string[] args) {

    //Shared 256 bit Key and IV here
    const string sKy = "lkirwf897+22#bbtrm8814z5qq=498j5"; //32 chr shared ascii string (32 * 8 = 256 bit)
    const string sIV = "741952hheeyy66#cs!9hjv887mxx7@8y"; //32 chr shared ascii string (32 * 8 = 256 bit)

    var sTextVal = "Here is my data to encrypt!!!";

    var eText = EncryptRJ256(sKy, sIV, sTextVal);
    var dText = DecryptRJ256(sKy, sIV, eText);

    Console.WriteLine("key: " + sKy);
    Console.WriteLine();
    Console.WriteLine(" iv: " + sIV);
    Console.WriteLine("txt: " + sTextVal);
    Console.WriteLine("encrypted: " + eText);
    Console.WriteLine("decrypted: " + dText);
    Console.WriteLine("press any key to exit");
    Console.ReadKey(true);
  }

  public static string DecryptRJ256(string prm_key, string prm_iv, string prm_text_to_decrypt) {

    var sEncryptedString = prm_text_to_decrypt;

    var myRijndael = new RijndaelManaged() {
      Padding = PaddingMode.Zeros,
      Mode = CipherMode.CBC,
      KeySize = 256,
      BlockSize = 256
    };

    var key = Encoding.ASCII.GetBytes(prm_key);
    var IV = Encoding.ASCII.GetBytes(prm_iv);

    var decryptor = myRijndael.CreateDecryptor(key, IV);

    var sEncrypted = Convert.FromBase64String(sEncryptedString);

    var fromEncrypt = new byte[sEncrypted.Length];

    var msDecrypt = new MemoryStream(sEncrypted);
    var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);

    csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);

    return (Encoding.ASCII.GetString(fromEncrypt));
  }

  public static string EncryptRJ256(string prm_key, string prm_iv, string prm_text_to_encrypt) {

    var sToEncrypt = prm_text_to_encrypt;

    var myRijndael = new RijndaelManaged() {
      Padding = PaddingMode.Zeros,
      Mode = CipherMode.CBC,
      KeySize = 256,
      BlockSize = 256
    };

    var key = Encoding.ASCII.GetBytes(prm_key);
    var IV = Encoding.ASCII.GetBytes(prm_iv);

    var encryptor = myRijndael.CreateEncryptor(key, IV);

    var msEncrypt = new MemoryStream();
    var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);

    var toEncrypt = Encoding.ASCII.GetBytes(sToEncrypt);

    csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
    csEncrypt.FlushFinalBlock();

    var encrypted = msEncrypt.ToArray();

    return (Convert.ToBase64String(encrypted));
  }

}

我仍然无法理解错误的位置。

Answer 1

.NET Fiddle解决方案 最初发布四年后。.netFiddle上的控制台编译要求包含main方法的类和静态main方法的类都必须标记为public。

由于小提琴应用程序的执行是从“运行”按钮开始的，而不是从在命令行中键入的命令开始的，所以我猜只是忽略了“ args”。但是，命令行输入仍然可以使用Console.ReadLine();

完成

我在一个小提琴上发现了一个简单的例子：

public class Program
{
    public static void Main(string[] args)
    {
            int number;
            string inputData = Console.ReadLine();

            if(int.TryParse(inputData, out number))
            {
                if (number > 0)
                { 
                    Console.WriteLine("You typed " + number + ". This is a postive value");
                    Console.ReadLine();
                }
                else if (number < 0) 
                {
                    Console.WriteLine("You typed" + number+ ". This is a negative value");
                    Console.ReadLine();
                }
                else
                {
                    Console.WriteLine("You typed" + number + " (zero).");
                    Console.ReadLine();
                }
            }
            else
            {
              Console.WriteLine("The input was not a valid integer.");
            }
    }
}

许多“控制台”（像原始海报一样）期望.net小提琴像控制台应用程序一样工作，希望这会有所帮助！

Answer 2

尝试在main方法string[] args中删除它对我有用。

公共类中需要公共Main（）方法

2 个答案: