遍历Panel1中所有label控件的Text

Arraylist values =new Arraylist//values是存储值的变量
foreach(Control a in panel1.Controls)
{
    if(a is Label)
    {
        values.Add(a.text);
    }
}

TextBox t = (TextBox)Panel1.FindControl("TextBox1");
string neir = t.Text;