我正在尝试使用ref更新控件的更新面板。以下链接。但它不起作用。我想知道我缺少什么。在我的应用程序中,不能在更新面板中使用这些标签。
http://msdn.microsoft.com/en-us/library/bb301423(v=vs.110).aspx
HTML
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="Updatepaneltest._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<script type="text/javascript" language="javascript">
Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(PageLoadingHandler);
function PageLoadingHandler(sender, args) {
var dataItems = args.get_dataItems();
if ($get('Label1') !== null)
$get('Label1').innerHTML = dataItems['Label1'];
if ($get('Label2') !== null)
$get('Label2').innerHTML = dataItems['Label2'];
}
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
UpdatePanel content.
<asp:Button ID="Button1" Text="Submit" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
<hr />
<asp:Label ID="Label1" Text="hiii" runat="server" /> <br />
<asp:Label ID="Label2" runat="server" />
</div>
</asp:Content>
背后的代码
protected void Page_Load(object sender, EventArgs e)
{
// ScriptManager ScriptManager1 = ScriptManager.GetCurrent(this.Page);
if (ScriptManager.GetCurrent(this.Page).IsInAsyncPostBack)
{
ScriptManager1.RegisterDataItem(Label1, DateTime.Now.ToString());
ScriptManager1.RegisterDataItem(Label2, DateTime.Now.Year.ToString());
}
}
答案 0 :(得分:1)
控制updatepanel内部的更新
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="Button1" Text="Submit" runat="server" />
<asp:Label ID="Label1" Text="hiii" runat="server" /> <br />
<asp:Label ID="Label2" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
控制updatepanel以外的更新
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode=Conditional>
<ContentTemplate>
<asp:Button ID="Button1" Text="Submit" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:Label ID="Label1" Text="hiii" runat="server" /> <br />
<asp:Label ID="Label2" runat="server" />
稍后,在客户端写下面的行。
var pageInstance = Sys.WebForms.PageRequestManager.getInstance();
pageInstance.add_pageLoaded(UpdateLabelHandler);
function UpdateLabelHandler(sender, args)
{
var ControldataItems = args.get_dataItems();
if ($get('Label1') !== null)
$get('Label1').innerHTML = ControldataItems ['Label1'];
if ($get('Label2') !== null)
$get('Label2').innerHTML = ControldataItems ['Label2'];
}
代码背后:
protected void Page_Load(object sender, EventArgs e)
{
ScriptManager1.RegisterDataItem(Label1, DateTime.Now.ToString());
ScriptManager1.RegisterDataItem(Label2, DateTime.Now.Year.ToString());
}
希望这可以帮助你。