How to tell if user has modified data using bindingsource?

Question

I have a DataGridView bound to a bindingsource which is bound to a List. The user clicks a row that goes to a form with textboxes, etc. The textboxes a

Answer 1

first make Sure you set DataSourceUpdateMode.OnPropertyChanged

txrFirstName.DataBindings.Add("Text", bindingSource1, "FirstName", false,DataSourceUpdateMode.OnPropertyChanged);

then add add this code to your movenext click event

 if (((DataRowView)bindingSource1.Current).IsNew)
                {
                MessageBox.Show("Current Row IsNew");
                }
            if (((DataRowView)bindingSource1.CurrencyManager.Current).Row.HasVersion(DataRowVersion.Proposed))
                {
                MessageBox.Show("Current Row Modified");
                DialogResult dialogResult = MessageBox.Show("Current Row Modified", "Some Title", MessageBoxButtons.YesNo);
                if (dialogResult == DialogResult.Yes)
                    {
                    //do something
                    ((DataRowView)bindingSource1.CurrencyManager.Current).Row.AcceptChanges();
                    }
                else if (dialogResult == DialogResult.No)
                    {
                    //do something else
                    ((DataRowView)bindingSource1.CurrencyManager.Current).Row.RejectChanges();
                    }


                }
            else { 
                bindingSource1.MoveNext();
                }