Edit selected item of datagridview and .txt file as well

Question

Hi friends i want to edit contact in my phone directory application using datagrid textbox and a button please help me !! and my second question is about deleting I had completed deleting process but some time it doesn't work correctly! !!here is the code!! private void button2_Click(object sender EventArgs e) { List myList = File.ReadAllLines(contact.txt).ToList(); //read foreach (DataGridViewRow item in this.dataGridView1.SelectedRows) { try { DialogResult result = MessageBox.Show(are you sure to delete!! Warning!! MessageBoxButtons.YesNo MessageBoxIcon.Question); if (result == DialogResult.Yes) { myList.RemoveAt(item.Index); File.WriteAllLines(contact.txt myList.ToArray()); dataGridView1.Rows.RemoveAt(item.Index); } else { this.dataGridView1.Focus(); } } catch { MessageBox.Show(unable to delete error MessageBoxButtons.OK MessageBoxIcon.Error); } } }

ali tuncer · Answer

if you don't select row it won't do anything that might be the problem..you could give a warning message.. private void button2_Click(object sender EventArgs e) { if (dataGridView1.SelectedRows.Count > 0) { //delete code here } else { //MessageBox.Show(no row selected to delete) } } How do you want to edit? Do you want to use CellValueChanged event? User will doubleclick on a cell type new value.. private void dataGridView1_CellValueChanged(object sender DataGridViewCellEventArgs e) { List myList = File.ReadAllLines(contact.txt).ToList(); string editLine = myList[e.RowIndex].ToString(); string newValue = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(); string[] con = editLine.Split(''); string oldValue = con[e.ColumnIndex].ToString(); myList.RemoveAt(e.RowIndex); myList.Insert(e.RowIndex editLine.Replace(oldValue newValue)); File.WriteAllLines(contact.txt myList.ToArray()); }