比较网格视图中的单元格值以获得更大的值c#

using System;
using System.Windows.Forms;

namespace GridViewExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int maxValue = int.MinValue;

            // 遍历每个单元格
            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                foreach (DataGridViewCell cell in row.Cells)
                {
                    // 检查单元格的值是否大于当前最大值
                    if (cell.Value != null && cell.Value is int)
                    {
                        int cellValue = (int)cell.Value;
                        if (cellValue > maxValue)
                        {
                            maxValue = cellValue;
                        }
                    }
                }
            }

            MessageBox.Show("最大值为：" + maxValue.ToString());
        }
    }
}