C# 多种形式的DataGridView和DetailView问题

我正在尝试创建一个多种形式的应用程序，它获取表属性的DataGridView，并在单击按钮后在DetailView中显示它们。当我点击按钮，第二个窗体打开时，它是空的。然后，如果我关闭第二个表单，我会得到“System.NullReferenceException”类型的未处理异常。这是我的密码：

表格一

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;

namespace MultiForm
{
    public partial class Form1 : Form2
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'personnelDataSet.employee' table. You can move, or remove it, as needed.
            this.employeeTableAdapter.Fill(this.personnelDataSet.employee);

        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void btnDetails_Click(object sender, EventArgs e)
        {
            Form2 dForm = new Form2();
            dForm.ShowDialog();
            this.tableAdapterManager.UpdateAll(this.personnelDataSet);
        }
    }
}

表格二

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;

namespace MultiForm
{
    public partial class Form2 : Form
    {
        //public Form2()
        //{
        //    InitializeComponent();
        //}

        private void employeeBindingNavigatorSaveItem_Click(object sender, EventArgs e)
        {
            this.Validate();
            this.employeeBindingSource.EndEdit();
            this.tableAdapterManager.UpdateAll(this.personnelDataSet);

        }

        private void Form2_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'personnelDataSet.employee' table. You can move, or remove it, as needed.
            this.employeeTableAdapter.Fill(this.personnelDataSet.employee);

        }
    }
}

---

我在

this.tableAdapterManager.UpdateAll（this.personnelDataSet）的表单1中得到了异常任何帮助都将不胜感激。
没有将数据组件拖到托盘中。。。对不起，伙计们