异常文本(System.Int32[])

我正在尝试制作一个代码，计算通过键盘输入的键的保持时间和按/释放时间。

hold time = keyup(i) - keydown(i+1)
release_press time = keydown(i+1) - keyup(i)
press_press time = keydown(i+1) - keydown(i)
release_release time = keyup(i+1) - keyup(i)

，这是我的代码没有错误和警告…但是当我运行它时，我在文本框中得到(System.Int32[])，其中应该显示保持和按/释放时间。我不知道为什么我得到一个错误或错误在哪里。

Form1.cs

    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 Domainnn;
    using Sessionnn;

    namespace TheLatestKS
    {
         public partial class Form1 : Form
{
    Brokerrr b = new Brokerrr();
    public Form1()
    {
        InitializeComponent();
    }
    int i = 0;
    private void timer1_Tick(object sender, EventArgs e)
    {
        i++;
    }
    int[] A=new int[25];
    int[] B=new int[25];
    int[] C=new int[25];
    int[] D=new int[25];
    int[] M=new int[25];
    int[] N=new int[25];
    int[] O=new int[25];
    int[] P=new int[25];
    private void textBox2_KeyDown(object sender, KeyEventArgs e)
    {
        timer1.Enabled = true;
        for (int a = 0; a < textBox2.TextLength; a++)
        {
            timer2.Enabled = true;
            M[a] = k;
            if (a >= 1)
            {
                O[a] = k;
            }
        }
    }
    int j = 0;
    int s = 0;
    float ave = 0;
    private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            textBox5.Text = i.ToString() + " ms";
            s = s + i;
            Personnn p = new Personnn();
            p.Username = textBox1.Text;
            p.Password = textBox2.Text;
            p.Totaltyping = label5.Text;
            p.Keyduration = textBox3.Text;
            textBox4.Text += textBox2.Text + Environment.NewLine;
            if (j >= 2)
            {
                ave = s / 3;
                textBox6.Text = ave.ToString() + " ms";
            }
            p.Meanoftotal = textBox6.Text;
            p.UDlatency1 = textBox8.Text;
            p.DDlatency1 = textBox9.Text;
            p.UUlatency1 = textBox10.Text;
            b.Insert(p);
            textBox1.Text = " ";
            textBox2.Text = " ";
            textBox3.Text = " ";
            textBox8.Text = " ";
            textBox9.Text = " ";
            textBox10.Text = " ";
            i = 0;
            j++;
        }
    private void textBox1_KeyDown(object sender, KeyEventArgs e)
    {
        if ((e.KeyValue < 65 || e.KeyValue > 122) && (e.KeyValue != 32) && (e.KeyValue != 8))
        {
            label7.Text = "Only letters are allowed";

        }
        if (e.KeyValue ==  8)
        {
            label7.Text = " ";
        }
    }
    private void textBox2_KeyUp(object sender, KeyEventArgs e)
    {
        for (int a = 0; a < textBox2.TextLength; a++)
        {
            timer2.Enabled = true;
            N[a] = k;
            if (a >= 1)
            {
                P[a] = k;
            }
        }
        for (int ii = 0; ii <textBox2.TextLength; ii++)
        {
         A[ii] = N[ii] - M[ii];// key duration
        }
        for (int iii = 0; iii < textBox2.TextLength-1; iii++)
        {
         B[iii] = O[iii] - N[iii];//UD latency
         C[iii] = O[iii] - M[iii];//DDlatency
         D[iii] = P[iii] - N[iii];//UU latency
        }
        textBox3.Text = A.ToString();// key duration
        textBox8.Text = B.ToString();// UD latency
        textBox9.Text = C.ToString();// DD latency
        textBox10.Text = D.ToString();// UU latency
    }
    int k = 0;
    private void timer2_Tick(object sender, EventArgs e)
    {
        k++;
    }
    private void Form1_Load(object sender, EventArgs e)
    {
    }
    private void label8_Click(object sender, EventArgs e)
    {
    }
}
    }

Personnn.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    namespace Domainnn
    {
public class Personnn
{
    int id;
    public int Id
    {
        get { return id; }
        set { id = value; }
    }
    string username;
    public string Username
    {
        get { return username; }
        set { username = value; }
    }
    string password;
    public string Password
    {
        get { return password; }
        set { password = value; }
    }
    string totaltyping;
    public string Totaltyping
    {
        get { return totaltyping; }
        set { totaltyping = value; }
    }
    string meanoftotal;
    public string Meanoftotal
    {
        get { return meanoftotal; }
        set { meanoftotal = value; }
    }
    string keyduration;
    public string Keyduration
    {
        get { return keyduration; }
        set { keyduration = value; }
    }
    string UDlatency;
    public string UDlatency1
    {
        get { return UDlatency; }
        set { UDlatency = value; }
    }
    string DDlatency;
    public string DDlatency1
    {
        get { return DDlatency; }
        set { DDlatency = value; }
    }
    string UUlatency;
    public string UUlatency1
    {
        get { return UUlatency; }
        set { UUlatency = value; }
    }
}
    }

Brokerrr.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.OleDb;
using Domainnn;
namespace Sessionnn
{
    public class Brokerrr
    {
        OleDbConnection connection;
        OleDbCommand command;
        private void ConnectTo()
        {
            connection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:'Users'S.M.A.S'Documents'Visual Studio 2010'Projects'TheLatestKS'Databaseee.accdb");
            command = connection.CreateCommand();
        }
        public Brokerrr()
        {
            ConnectTo();
        }
        public void Insert(Personnn p)
        {
            try
            {
                command.CommandText = "INSERT INTO Table1 ([Username], [Password], Totaltyping, Meanoftotal, Keyduration, UDlatency, DDlatency ,UUlatency) VALUES('" + p.Username + "', '" + p.Password + "', '" + p.Totaltyping + "', '"+p.Meanoftotal+"', '"+p.Keyduration+"', '"+p.UDlatency1+"', '"+p.DDlatency1+"', '"+p.UUlatency1+"')";
                command.CommandType = CommandType.Text;
                connection.Open();
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                throw;
            }
            finally
            {
                if (connection != null)
                {
                    connection.Close();
                }
            }
        }
    }
}

textBox3.Text = A.ToString();// key duration

A[i].ToString();

textbox3.Text = A.ToString();

string.Join(" ", A)