C#实现ASCII和字符串相互转换的代码示例

Stirng.Empty

public void Main()
    {
        double radiusValue = 3.92781;
        //Calculate the circumference and area of a circle, returning the results to Main().
        CalculateCircumferenceAndArea(radiusValue, out double circumferenceResult, out var areaResult);
        System.Console.WriteLine($"Circumference of a circle with a radius of {radiusValue} is {circumferenceResult}.");
        System.Console.WriteLine($"Area of a circle with a radius of {radiusValue} is {areaResult}.");
        Console.ReadLine();
    }

    //The calculation worker method.
    public static void CalculateCircumferenceAndArea(double radius, out double circumference, out double area)
    {
        circumference = 2 * Math.PI * radius;
        area = Math.PI * (radius * radius);
    }

//返回与指定代码页名称关联的编码。
//Encoding.GetEncoding(String)
using System;
using System.Text;

public class SamplesEncoding  {

   public static void Main()  {

      // Get a UTF-32 encoding by codepage.
      Encoding e1 = Encoding.GetEncoding( 12000 );

      // Get a UTF-32 encoding by name.
      Encoding e2 = Encoding.GetEncoding( "utf-32" );

      // Check their equality.
      Console.WriteLine( "e1 equals e2? {0}", e1.Equals( e2 ) );
   }
}
/* 
This code produces the following output.

e1 equals e2? True

*/

//GetBytes(Char[])
//在派生类中重写时，将指定字符数组中的所有字符编码为一个字节序列。

if(textBox1.Text!="")
{
    string chars_StrA = "hello";
    string chars_StrB=string.Empty;
    char[] txtChars01 = new char[10];
    char[] txtChars02 = new char[10];
    for (int i=0;i<textBox1.Text.Length;i++)
    {
        txtChars01[i] =textBox1.Text[i];
    }
    for(int j= 0; j< chars_StrA.Length; j++)
    {
        txtChars02[j] = chars_StrA[j];
        chars_StrB += txtChars02[j];
    }
}

  private void btn_ToASCII_Click(object sender, EventArgs e)
  {
      

      if(txt_char.Text!=string.Empty)
      {
          if(Encoding.GetEncoding("unicode").GetBytes(new char[] { txt_char.Text[0] })[1]==0)
          {
              txt_ASCII.Text = Encoding.GetEncoding("unicode").GetBytes(txt_char.Text)[0].ToString();
          }
          else
          {
              txt_ASCII.Text = string.Empty;
              MessageBox.Show("请输入字母！", "提示！");
          }
      }
  }

  private void btn_ToChar_Click(object sender, EventArgs e)
  {
      if(txt_ASCII2.Text!=string.Empty)
      {
          int P_int_Num;//定义整型局部变量
          if(int.TryParse(txt_ASCII2.Text,out P_int_Num))
          {
              txt_Char2.Text = ((char)P_int_Num).ToString();
          }
          else
          {
              MessageBox.Show("请输入正确ASCII码值", "错误");
          }
      }
      
  }