C# (CSharp) Graph1.Add_City Beispiele

Beispiel #1

 private void button2_Click(object sender, EventArgs e)
 {
     if (Add_City_Is_NumberOrNull())
     {
         MessageBox.Show("城市名不能为空或者纯数字");
         return;
     }
     if (grp1.Add_City(textBox3.Text.ToString()))
     {
         MessageBox.Show("数据添加成功");
     }
     else
     {
         MessageBox.Show("已存在此城市");
     }
 }