public partial class Page : System.Web.UI.Page { protected void Page_Load(object sender, Args e) { __________.Text = "欢迎您!"; } } public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, Args e) { } protected void Button1_Click(object sender, Args e) { Label labelname = (Label)__________.__________("Label1"); __________.Text = "欢迎" + TextBox1.Text + "!"; } }