Update DataTable from DataGridView (without DataBase) in Windows Forms Application

Hi Fenil

Check this example. Now please take its reference and correct your code.

Form1.Designer.cs

Namespaces

using System.Data;

Code

C#

public partial class Form1 : Form
{
    DataTable dt = new DataTable();
    public Form1()
    {
        InitializeComponent();
        this.BindDataGridView();

    }
    private void BindDataGridView()
    {
        dt.Columns.AddRange(new DataColumn[] {new DataColumn("Name", typeof(string)),
                        new DataColumn("Country",typeof(string)) });
        dt.Rows.Add("John Hammond", "United States");
        dt.Rows.Add("Mudassar Khan", "India");
        dt.Rows.Add("Suzanne Mathews", "France");
        dt.Rows.Add("Robert Schidner", "Russia");
        this.dataGridView1.DataSource = dt;
    }

    private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
    {
        MessageBox.Show("Cell is Updated : " + dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString());

    }

    private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
    {
        if ((treeView1.SelectedNode == null))
        {
            dataGridView1.DataSource = null;
            return;
        }
        if ((treeView1.SelectedNode.Text == "Name"))
        {
            dataGridView1.DataSource = null;
            return;
        }
        string sRef;
        sRef = treeView1.SelectedNode.Text;
        DataView dv = new DataView(dt);
        dv.RowFilter = " Name = '" + sRef + "'";
        dataGridView1.DataSource = dv;
    }
}

Screenshot