private void button5_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(textBox8.Text) || string.IsNullOrWhiteSpace(textBox5.Text)) { PopUp.ShowInfo("One or more TextBox is empty"); return; } int level; if (!int.TryParse(textBox5.Text, out level)) { PopUp.ShowInfo("Level has an invalid format"); } KeyValuePair <string, int> keyValue = new KeyValuePair <string, int>(textBox8.Text, level); if (listBox2.Items.Contains(keyValue)) { PopUp.ShowInfo("Skill is already in place"); } textBox8.Clear(); textBox5.Clear(); listBox2.Items.Add(keyValue); }
private void button6_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(textBox6.Text)) { PopUp.ShowInfo("textbox is empty"); return; } if (listBox3.Items.Contains(textBox6.Text)) { PopUp.ShowInfo($"{textBox6.Text} is already added"); return; } listBox3.Items.Add(textBox6.Text); textBox6.Clear(); }