How to handle these errors?

Question

This is my code

 

I need help to handle a few errors that i dont know why im seeing

 

1. Automatically a new grid for Image is created. 

2. An error keeps popping up 

 

 

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace Amal_Inventory
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
}
private void button6_Click(object sender, EventArgs e)
{
}
private void button5_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Sure ??", "Delete", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation)==DialogResult.OK)
{
if (this.dataGridView1.SelectedRows.Count > 0)
{
dataGridView1.Rows.RemoveAt(this.dataGridView1.SelectedRows[0].Index);
}
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
}
}
private void button7_Click(object sender, EventArgs e)
{
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
pictureBox1.Image = "";
}
private void button8_Click(object sender, EventArgs e)
{
Update();
}
private void button2_Click(object sender, EventArgs e)
{
int n = dataGridView1.Rows.Add();
dataGridView1.Rows[n].Cells[0].Value = textBox1.Text;
dataGridView1.Rows[n].Cells[1].Value = textBox2.Text;
dataGridView1.Rows[n].Cells[2].Value = textBox3.Text;
dataGridView1.Rows[n].Cells[3].Value = textBox4.Text;
dataGridView1.Rows[n].Cells[4].Value = textBox5.Text;
dataGridView1.Rows[n].Cells[5].Value = textBox6.Text;
dataGridView1.Rows[n].Cells[6].Value = textBox7.Text;
dataGridView1.Rows[n].Cells[7].Value = textBox8.Text;
dataGridView1.Rows[n].Cells[8].Value = textBox9.Text;
MemoryStream mmst = new MemoryStream();
pictureBox1.Image.Save(mmst, pictureBox1.Image.RawFormat);
byte[] img = mmst.ToArray();
dataGridView1.Rows.Add(img);
}
private void Form1_Load(object sender, EventArgs e)
{
DataGridViewImageColumn dvgimage = new DataGridViewImageColumn();
dvgimage.HeaderText = "Image";
dvgimage.ImageLayout = DataGridViewImageCellLayout.Stretch;
dataGridView1.Columns.Add(dvgimage);
dataGridView1.RowTemplate.Height = 120;
dataGridView1.AllowUserToAddRows = false;
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult confirm = MessageBox.Show("Are you sure?", "Exit", MessageBoxButtons.YesNo);
}
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfiledialogue1 = new OpenFileDialog();
openfiledialogue1.Filter = "Choose Image (*.jpg;*.png;*.gif)|*.jpg;*.png;*.gif";
if (openfiledialogue1.ShowDialog() == DialogResult.OK)
{
pictureBox1.Image = new Bitmap(openfiledialogue1.FileName);
}
}
}
}