private void addButton_Click(object sender, EventArgs e)
{
if (_customerManager.isNameExist(customerNameTextBox.Text))
{
MessageBox.Show("Customer Name Is ALREADY Exists!!!");
return;
}
if (String.IsNullOrEmpty(customerNameTextBox.Text) || (String.IsNullOrEmpty(contactNumberTextBox.Text)))
{
MessageBox.Show("Name and Mobile Number Must be Added!!!");
return;
}
bool added = _customerManager.AddData(customerNameTextBox.Text, contactNumberTextBox.Text);
if (added)
{
MessageBox.Show("Successfully added.");
}
else
{
MessageBox.Show("Can't be added.");
}
customerDetailsDataGridView.DataSource = _customerManager.ShowData();
}