📄 ch09-04-01.aspx
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<Html>
<Head>
<Title>Ch09-04-01.aspx 表单回发的IsPostBack属性</Title>
<Script Language="VB" Runat="Server" >
Sub Page_Load(Obj As Object, e As EventArgs)
If IsPostBack Then
If UserName.Text <> "请输入姓名" And _
Trim(UserName.Text) <> "" Then
Label1.Text = UserName.Text & "您好！"
Else
Label1.Text = "必需输入姓名！"
End If
Else
UserName.Text = "请输入姓名"
End If
End Sub
</Script>
</Head>
<Body>
<H4>暂时取消服务器端控件的功能</H4>
<Form Runat="Server">
姓名：
<asp:TextBox ID="UserName" Runat="Server" />
<asp:Button ID="Button1" Text="提交"
Runat="Server" /><P>
<asp:Label ID="Label1" BorderStyle="Double"
BorderColor="#FF8888" Runat="Server" />
</Form>
</Body>
</Html>
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