.NET2.0学习笔记1

1、<head runat="server">的作用，使用主题的时候需要runat=server；设置页面Title更加方便，直接在后台代码里面Title="我的标题"，.net1.1里面只能通过<%=title%>或js(document.title)实现

2、Page.IsCallback的一个例子，实现无刷新很简单

Partial Class _Default
    Inherits System.Web.UI.Page
    Implements ICallbackEventHandler

    Private _cpf As String

    Public Sub RaiseCallbackEvent(ByVal eventArgs As String) Implements System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent
        Me._cpf = eventArgs
    End Sub

    Public Function GetCallbackResult() As String Implements System.Web.UI.ICallbackEventHandler.GetCallbackResult
        Return Me._cpf + ":ok"
    End Function

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
        Handles Me.Load
        Title = "123"
        If Not Page.IsCallback AndAlso Request.Browser.SupportsCallback Then
            Dim funcaoJS As String = Me.ClientScript.GetCallbackEventReference( _
                Me, _
                "document.getElementById('" + Me.TextBox1.ClientID + "').value", _
                "ExibeNome", _
                "'ok'", _
                True)

            Me.Button1.OnClientClick = String.Concat(funcaoJS, "; return false;")
        End If
    End Sub

End Class

<html>
<head runat="server">
    <title>Untitled Page</title>

    <script language="javascript">
        function ExibeNome(arg, context)
        {
            document.getElementById('<%=TextBox1.ClientID%>').value = arg;
        }

    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Button" />&nbsp;</div>
    </form>
</body>
</html>