Edit data in DataGridView

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C#

DataGrid

I am fetching data from a database and displaying data in DataGridView in C#. Now when I right click on any row it should display context menu to edit row. when I press the edit of context menu in the same form it should display all columns of that selected row in TextBox so that I can edit/modify the data.

My code is:

private void dataGrid1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            ContextMenuStrip mnu = new ContextMenuStrip();
            ToolStripMenuItem mnuedit = new ToolStripMenuItem("Edit");
            mnuedit.Click += new EventHandler(editToolStripMenuItem_Click);
            mnu.Items.AddRange(new ToolStripItem[] { mnuedit });
            //Assign to datagridview
            dataGrid1.ContextMenuStrip = mnu;
        }


private void editToolStripMenuItem_Click(object sender, EventArgs e)
        {

            if (dataGrid1.SelectedRows.Count = 0)
            {
                textnotes.Value = dataGrid1.SelectedRows(0).Cells(0).Value;
                textclient.Value = dataGrid1.SelectedRows(0).Cells(1).Value;
                textdatetime.Value = dataGrid1.SelectedRows(0).Cells(2).Value;
                textcombobox.Value = dataGrid1.SelectedRows(0).Cells(3).Value;
            }


        }