C# 字符串比较返回false event，尽管它们相同

我有以下代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO.Ports;
using System.Threading;
using System.Windows.Threading;
using System.Data.SQLite;
using System.Text.RegularExpressions;

namespace SerialTrial
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>

    public class ThreadExample
    {
        FlowDocument mcFlowDoc = new FlowDocument();
        Paragraph para = new Paragraph();

        public static void ThreadJob(MainWindow mainWindow)
        {
            string dBConnectionString = @"Data Source = C:\Users\Documents\Visual Studio 2012\Projects\SerialTrial\SerialTrial\bin\Debug\CompanyList.sqlite;";
            SQLiteConnection sqliteCon = new SQLiteConnection(dBConnectionString);
            //open connection to database
            try
            {
                sqliteCon.Open();
                SQLiteCommand createCommand = new SQLiteCommand("Select * from AllEmployee", sqliteCon);
                SQLiteDataReader reader;
                reader = createCommand.ExecuteReader();

                int count = 0;
                //richtextbox2.Document.Blocks.Clear();
                List<string> mystring = new List<string>();
                while (reader.Read())
                {
                    count++;
                    string Text = (String.Format("{0}", Object.Equals(Variables.buffering, reader.GetString(0))));

                    Console.WriteLine(Text);

                    mystring.Add(Text);
                    if (Convert.ToBoolean(Text))
                    {
                        mystring.Add("1");
                        //string myText = new TextRange(mainWindow.richtextbox2.Document.ContentStart, mainWindow.richtextbox2.Document.ContentEnd).Text;

                        //replace two or more consecutive spaces with a single space, and
                        //replace  two or more consecutive newlines with a single newline.
                        //var str = Regex.Replace(myText, @"( |\r?\n)\1+", "$1", RegexOptions.Multiline);
                        //Int64 id = reader.GetInt64(0);
                        string fname = reader.GetString(1);
                        string sname = reader.GetString(2);
                        DateTime saveNow = DateTime.Now;

                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.Document.Blocks.Add(new Paragraph(new Run(saveNow.ToString())))));
                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.AppendText(": ")));
                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.AppendText(fname)));
                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.AppendText(" ")));
                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.AppendText(sname)));
                        mainWindow.Dispatcher.Invoke(new Action(() => mainWindow.richtextbox2.AppendText(" granted access to gate 1")));                      
                        string text = "s";
                        mainWindow.WriteSerial(text);
                        //Console.WriteLine(Text);

                        //Console.WriteLine("ID = {0}, Name = {1}, Surname = {2}, Age = {3}", id, fname, sname, age);
                        //Console.WriteLine("{0}\t{1}\t{2}\t{3}", reader.GetInt64(0), reader.GetString(1), reader.GetString(2), reader.GetString(3));

                    }
                }
sqliteCon.Close();

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

    }

public partial class MainWindow : Window
    {
        SerialPort serial = new SerialPort();
        //string received_data;
        //Thread readThread = new Thread(Read);
        FlowDocument mcFlowDoc = new FlowDocument();
        Paragraph para = new Paragraph();


        public MainWindow()
        {
            InitializeComponent();
            combobox1.Items.Insert(0, "Select Port");
            combobox1.SelectedIndex = 0;
            string[] ports = null;
            ports = SerialPort.GetPortNames();


            // Display each port name to the console. 
            int c = ports.Count();
            for (int i = 1; i <= c; i++)
            {
                if (!combobox1.Items.Contains(ports[i - 1]))
                {
                    combobox1.Items.Add(ports[i - 1]);
                }

            }
        }
        string dBConnectionString = @"Data Source = C:\Users\Documents\Visual Studio 2012\Projects\SerialTrial\SerialTrial\bin\Debug\CompanyList.sqlite;";

        static int count = 0;

private void Button_Click(object sender, RoutedEventArgs e)
        {
            count++;
            string[] ports = null;
            ports = SerialPort.GetPortNames();


            // Display each port name to the console. 
            int c = ports.Count();
            for (int i = 1; i <= c; i++)
            {
                if (!combobox1.Items.Contains(ports[i - 1]))
                {
                    combobox1.Items.Add(ports[i - 1]);
                }

            }

        }
public void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {   
            int bytes = serial.BytesToRead;
            Console.WriteLine(bytes);
            if (bytes == 14)
            {
                byte[] buffer = new byte[bytes];
                serial.Read(buffer, 0, bytes);
                System.String ID = System.Text.Encoding.Default.GetString(buffer);
                //System.String ID = new String(System.Text.Encoding.UTF8.GetChars(buffer));
                Console.WriteLine(ID);
                foreach (var item in ID)
                {
                    Console.WriteLine(item.ToString());
                }
                /*
                Console.WriteLine();
                string s2 = BitConverter.ToString(buffer);
                string tempAry = s2.Replace("-", "");
                Console.WriteLine(tempAry);

                Variables.buffering = BitConverter.ToInt64(buffer, 0);
                 */
                Variables.buffering = ID;
                Console.WriteLine();
                //Console.WriteLine(Variables.buffering);
                Thread thread = new Thread(new ThreadStart(() => ThreadExample.ThreadJob(this)));
                thread.Start();
                thread.Join();
            }

        }

---

请帮忙。谢谢

Object.Equals比较地址

    Object.Equals(Variables.buffering, reader.GetString(0))

尝试使用字符串。等于比较字符串

---

编辑：正如下面的评论所指出的，这不仅不起作用，而且也是错误的，因此请忽略我的回答

通常我们比较值类型变量或参考类型变量。如果您将int，string类型的变量与int，string进行比较，那么您应该选择值类型，如1=1或“a”=“b”，但当您与object进行比较时，您应该选择引用类型，如1.equal（1）或a.equal（b）

您收到的数据是

0x02,0x37,0x30,0x30,0x32,0x42,0x34,0x30,0x38,0x45,0x39,0x35,0x03

。我猜0x02和0x03是一种开始和停止字节。它们之间是ASCII字符串。因此，您需要通过替换代码来忽略这些开始和停止字节：

System.String ID = System.Text.Encoding.Default.GetString(buffer);

与

---

错误发生在代码的何处？您已经提供了很多代码。。。你试过调试检查器告诉你的内容吗？要支持你相对简单的问题，代码太多了。您是否尝试过显示相同问题的非常小的控制台应用程序？在调用

对象.Equals

时，

变量的具体内容是什么。缓冲
和
读取器.GetString（0）
？有哪些
.ToCharArray（）
输出？他们持有什么？另外：您应该在这里使用
=
：
变量。缓冲==reader.GetString（0）
您可以将开头的0x02和结尾的0x03转换为字符串。而如果转换为字符串，则希望跳过它们。尝试
.GetString（buffer，1，12）
.Variables.buffering在类中使其全局化。没有错误，但输出不是我所期望的，因为我从串行接收的字符串在数据库中是相同的。我的代码如何返回false？这段代码是：stringtext=（string.Format（{0}），Object.Equals（Variables.buffering，reader.GetString（0））；我尝试更改为：string Text=（string.Format（{0}），string.Equals（Variables.buffering，reader.GetString（0））；--但如果使用Object.Equals with strings，它仍然返回False。它将调用string.Equals。那么我如何检查这两个字符串的相似性呢？一个来自串行端口，另一个来自我的sqlite数据库变量如何。buffering==reader.GetString（0），如上所述？object.Equals不比较地址。它执行被重写的
等于
方法对提供的第一个实例执行的任何操作。引用类型的默认实现是比较引用，但只有在没有提供其他实现时才进行比较。字符串重写
等于
，以提供值语义。
System.String ID = System.Text.Encoding.Default.GetString(buffer);

System.String ID = System.Text.Encoding.Default.GetString(buffer, 1, 12); // start reading from byte at 1st position and take 12 of them