C# 在DataGridView中反映修改的字段

为了回答我的问题，我需要先做一点解释，请耐心听我说

本申请表有两种形式。在主窗体中，我有一个DataGridView。它显示数据库表中的数据。其数据源设置为DataTable对象。这是主窗体的代码

using System;
using System.Data;
using DataAccess;

namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        private SqlDataAccess _dataAccess = new SqlDataAccess(); //SqlDataAccess is a class written to handle database related operations
        private DataTable _dataTable = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            string query = @"SELECT * FROM fEmployee";
            _dataTable = _dataAccess.GetDataTable(query, null);
            dgvEmployees.DataSource = _dataTable;
        }

        private void dataGridView1_RowHeaderMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            //Convert the current selected row in the DataGridView to a DataRow
            DataRowView currentDataRowView = (DataRowView)dgvEmployees.CurrentRow.DataBoundItem;
            DataRow dataRow = currentDataRowView.Row;

            Form2 f = new Form2(dataRow);
            f.ShowDialog();           
        }
    }
}

单击DataGridView的行标题时，将显示一个子表单。此子窗体用作修改选定行的字段值的位置。包含所选行字段的DataRow对象被发送到子表单的重载构造函数。在该表单的加载事件中，该数据行中包含的数据将显示在子表单的多个文本框中

子窗体的代码

using System;
using System.Data;

namespace WindowsFormsApplication3
{
    public partial class Form2 : Form
    {
        private DataRow _employeeDetails = null;
        private bool _isDirty = false;

        public Form2(DataRow empDetails)
        {
            InitializeComponent();

            _employeeDetails = empDetails;
        }

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

        private void Form2_Load(object sender, EventArgs e)
        {
            txtFName.Text = _employeeDetails["FirstName"].ToString();
            txtLName.Text = _employeeDetails["LastName"].ToString();
            txtAddress.Text = _employeeDetails["Address"].ToString();
            txtCity.Text = _employeeDetails["City"].ToString();
            txtPostalCode.Text = _employeeDetails["PostalCode"].ToString();
            txtCountry.Text = _employeeDetails["Country"].ToString();
            dtpDOB.Value = Convert.ToDateTime(_employeeDetails["DOB"]);
            txtPhone.Text = _employeeDetails["Phone"].ToString();
            txtEmail.Text = _employeeDetails["Email"].ToString();
            dtpDOJ.Value = Convert.ToDateTime(_employeeDetails["DOJ"]);
            txtBasicSalary.Text = _employeeDetails["BasicSalary"].ToString();
        }

        private void btnUpdate_Click(object sender, EventArgs e)
        {

        }
    }
}

在子表单中，用户可以通过文本框更改值

现在我的问题是：如何在主窗体的DataGridView中反映对子窗体中特定行所做的更改

示例-单击一行标题，它将打开子窗体并加载详细信息。我改名字。当我关闭子窗体时，修改后的值应该在主DataGridview中更新

有人能就如何做到这一点提出一些建议吗

---

我尝试将数据行作为引用传递给子表单，但没有成功。

尝试测试这种方法。您必须使用DataRow[]更新所选DataRow中的数据。请试着把它弄清楚，想个办法

public partial class MainForm : Form
{
    public MainForm()
    {
        InitializeComponent();
    }

    public BindingSource bs = new BindingSource();
    public DataRow[] mainDataRow;
    private DataTable employee = new DataTable();

    private void MainForm_Load(object sender, EventArgs e)
    {
        employee.Columns.Add("Id");
        employee.Columns.Add("LastName");
        employee.Columns.Add("FirstName");
        employee.Columns.Add("MiddleName");

        object[] emp1 = { "1", "Some1a", "Some1b", "Some1c" };
        object[] emp2 = { "2", "Some2a", "Some2b", "Some2c" };
        object[] emp3 = { "3", "Some3a", "Some3b", "Some3c" };
        object[] emp4 = { "4", "Some4a", "Some4b", "Some4c" };
        employee.Rows.Add(emp1);
        employee.Rows.Add(emp2);
        employee.Rows.Add(emp3);
        employee.Rows.Add(emp4);

        bs.DataSource = employee;
        dataGridView1.DataSource = bs;

    }

    private void dataGridView1_RowHeaderMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
    {
        //Convert the current selected row in the DataGridView to a DataRow
        DataRowView currentDataRowView = (DataRowView)dataGridView1.CurrentRow.DataBoundItem;
        mainDataRow = employee.Select("Id='"+ currentDataRowView[0].ToString() + "'"); //get the primary key id
        using (var f = new Form2{ dataRow = mainDataRow, Owner = this })
        {
            f.ShowDialog();        
        }
    }
}

然后在表格2中：

---

在从关闭sub之前，请更新表中的详细信息。调用bind方法，该方法将Datagridview的db中的数据绑定到主窗体中。我也想到了该选项，但我将其作为最后的选择。我正在尝试在完成所有修改后从主菜单更新后端数据库：好的。修改后的数据行被发送回主屏幕，对吗？-创建一个函数并保持数据表中除您正在修改的行以外的所有行可用。删除您正在修改的行。您可以基于主键执行此操作。然后将此修改后的数据行导入现有数据表并在网格中显示。我希望这对您有所帮助。。

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

    public DataRow[] dataRow;
    private void Form2_Load(object sender, EventArgs e)
    {
        var select = dataRow[0];
        lastNameTextBox.Text = select[1].ToString();
        firstNameTextBox.Text = select[2].ToString();
        middleNameTextBox.Text = select[3].ToString();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        MainForm m = this.Owner as MainForm;
        var updated = dataRow[0];
        updated[1] = lastNameTextBox.Text;
        updated[2] = firstNameTextBox.Text;
        updated[3] = middleNameTextBox.Text;
        m.mainDataRow[0] = updated;
        Close();
    }
}