public FrmAddDona()
{
InitializeComponent();
categoriescombo.DataSource = Dona.GET_ALL_CATEGORIES();
categoriescombo.DisplayMember = "Description";
categoriescombo.ValueMember = "ID";
DonatorID.Focus();
}
private void DonatorID_TextChanged(object sender, EventArgs e)
{
bool containsLetter = false;
string text1 = DonatorID.Text.Trim();
for (int i = 0; i < text1.Length; i++)
{
if (!char.IsNumber(text1[i]))
{
containsLetter = true;
}
}
if (containsLetter)
{
MessageBox.Show("error string in number", "error", MessageBoxButtons.OK, MessageBoxIcon.Error);
if (MessageBox.Show("do you want to clear the text and start again? ", "clear حقل الكمية", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == DialogResult.Yes)
{
DonatorID.Clear();
}
}
}
