Problem on retrieving data from database to C#windows Form.

You can do some thing like this to extract the numbers from string

string Number= Regex.Match(yourdbcolumn, @"\d+").Value;

As per your requirement

string strYears = "12Years";
            string[] strArray = Regex.Matches(strYears, @"[a-zA-Z]+|\d+").Cast().Select(year => year.Value).ToArray();


            textBox1.Text = strArray[0].ToString();
            comboBox1.Items.Add(strArray[1].ToString());
           comboBox1.SelectedIndex = 0;