1.

<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
        </div>  
    </form>
 </body>

后台赋值

Label1.Text="abc";

2.

热键功能  Acceess=“N”  按alt+s 就可以自动点击按钮

<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
            <asp:button runat="server" text="Button" AccessKey="S" OnClick="Unnamed1_Click" />
        </div>  
    </form>
 </body>

3.

文本框默认光标位置

    <form id="form1" runat="server">
        <div>
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        </div>  
        <div>
            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        </div>
    </form>
        protected void Page_Load(object sender, EventArgs e)
        {
            TextBox2.Focus();
        }

(7)ASP.NET WEB服务器控件_赋值