Question

我的字符串输出是

String mystring="My Name¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥";

我如何接受这个¥¥¥¥¥¥。我正在使用C＃。

我试过这个

mystring.Trim( '¥' );

但它没有用

我正在聊天，这是我的代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
namespace Chat
{
public partial class Form1 : Form
{

    Socket sck;
    EndPoint epLocal, epRemote;

    public Form1()
    {
        InitializeComponent();

        sck = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
        sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);

        textLocalIp.Text= GetLocalIP();
        textFriendsIp.Text = GetLocalIP();
    }

     private string GetLocalIP()
    {
        IPHostEntry host;
        host = Dns.GetHostEntry(Dns.GetHostName());
        foreach (IPAddress ip in host.AddressList)
        {
            if (ip.AddressFamily == AddressFamily.InterNetwork)
            {
                return ip.ToString();
            }
        }
        return "127.0.0.1";
    }


     private void MessageCallBack(IAsyncResult aResult)
    {
        try
        {
            int size = sck.EndReceiveFrom(aResult, ref epRemote);
            if (size > 0)
            {
                byte[] receivedData = new byte[1464];
                receivedData = (byte[])aResult.AsyncState;
                ASCIIEncoding eEncoding = new ASCIIEncoding();
                string receivedMessage = eEncoding.GetString(receivedData);
                string c = Caesar(receivedMessage, -1); // String recibido se cambia alreves
                //Console.WriteLine(c.Trim( new Char[] { '¥' } )); //Here is where it doesnt work////////////////////

                listMessage.Items.Add("Anonymous: "+c.Trim(  '¥'  ));


            }

            byte[] buffer = new byte[1500];
            sck.BeginReceiveFrom(buffer,
                0,
                buffer.Length,
                SocketFlags.None,
                ref epRemote,
                new AsyncCallback(MessageCallBack),
                buffer);



        }
        catch (Exception exp)
        {
            MessageBox.Show(exp.ToString());
        }
    }

    private void button2_Click(object sender, EventArgs e)
    {
         try
        {
            System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();

            string b = Caesar(textMessage.Text, 1); // Sending the Chipper


            byte[] msg = new byte[1500];
            msg = enc.GetBytes(b);

            sck.Send(msg);
            listMessage.Items.Add("You: "+textMessage.Text);
            textMessage.Clear();
        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
         try
        {
            //epLocal = new IPEndPoint(IPAddress.Parse(textLocalIP.Text, Convert.ToInt32(textLocalPort.Text));
            epLocal = new IPEndPoint(IPAddress.Parse(textLocalIp.Text),Convert.ToInt32(textLocalPort.Text));
            sck.Bind(epLocal);

            epRemote = new IPEndPoint(IPAddress.Parse(textFriendsIp.Text),
                Convert.ToInt32(textFriendsPort.Text));
            sck.Connect(epRemote);

            byte[] buffer = new byte[1500];
            sck.BeginReceiveFrom(buffer,
                0,
                buffer.Length,
                SocketFlags.None,
                ref epRemote,
                new AsyncCallback(MessageCallBack),
                buffer);

            button1.Text = "Connected!";
            button1.Enabled = false;
            button2.Enabled = true;
            textMessage.Focus();

        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }


static string Caesar(string value, int shift)
    {
    char[] buffer = value.ToCharArray();
    for (int i = 0; i < buffer.Length; i++)
    {
        // Letter.
        char letter = buffer[i];
        // Add shift to all.
        letter = (char)(letter + shift);
        // Subtract 26 on overflow.
        // Add 26 on underflow.
    if (letter > 'z')
    {
    letter = (char)(letter - 26);
    }
    else if (letter < 'a')
    {
    letter = (char)(letter + 26);
    }
    // Store.
    buffer[i] = letter;
}
return new string(buffer);
}

}

}

错误是我标记的地方，而我的出局就像我的名字一样出现了...¥¥¥¥¥¥¥¥y¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ ¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥

Answer 1

如果您希望变量具有新值，则需要确保将结果返回给它：

mystring = mystring.Trim( '¥' );

Answer 2

你可能会尝试

mystring = mystring.Remove(mystring.IndexOf('¥'));

我相信在该角色的第一个实例之后会删除所有内容。在此查找文档。 https://msdn.microsoft.com/en-us/library/d8d7z2kk%28v=vs.110%29.aspx

我认为它只能用一个参数。

Answer 3

这是删除尾随字符的另一种方法。

根据Microsoft：

TrimEnd方法从当前字符串中删除所有尾随 trimChars参数中的字符。修剪操作遇到第一个不在trimChars中的字符时停止在字符串的末尾。

mystring = mystring.TrimEnd( '¥' );

如何从字符串中删除剩余的不需要的char

3 个答案: