ScriptManager.RegisterClientScriptInclude在UpdatePanel中不起作用

时间:2009-12-16 18:20:13

标签: asp.net-ajax updatepanel scriptmanager

我通过网络阅读但未找到解决以下问题的方法。我有一个示例页面(_ScriptManager.aspx),其中ScriptManagerUpdatePanelMultiView有两个Views和两个LinkButtons两个视图之间的切换。第二个视图包含一些我想为(_ScriptManager.js)加载JavaScript文件的功能。

由于我不知道用户是否会访问视图2我不想为每个请求静态包含javascript文件。我只想在需要时加载它。所以我需要在异步回发期间包含脚本文件,这是我使用ScriptManager.RegisterClientScriptInclude的。痛苦是:它不起作用。脚本包含在某种程度上不在客户端上执行,因此无法使用内部的javascript函数。更糟糕的是,在ScriptManager.RegisterStartupScript中注册的脚本块在这种情况下不会被执行!这一切都非常恼人。有趣的是,包含脚本和脚本块确实通过异步回发(Fiddler是我的朋友:-))发送到客户端,并且还加载了脚本文件。但那时javascript似乎打破了......

有没有人知道或知道报告的错误?

_ScriptManager.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="_ScriptManager.aspx.cs" Inherits="Frontend.Web._Tests.ScriptManagerTest" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title></title>
  <script src="http://ajax.microsoft.com/ajax/jQuery/jquery-1.3.2.min.js"></script>
</head>
<body>
  <form id="form1" runat="server">
    <asp:ScriptManager runat="server" ID="scm"></asp:ScriptManager>
    <asp:Label runat="server" ID="lbOut">Outside of UpdatePanel</asp:Label>
  <div style="border: solid 1px red;">
      <asp:UpdatePanel runat="server" ID="up" UpdateMode="Conditional">
        <ContentTemplate>
          <div>
            <asp:LinkButton runat="server" ID="btnFirst">Show view 1</asp:LinkButton>
            <asp:LinkButton runat="server" ID="btnSecond">Show view 2</asp:LinkButton>
          </div>
          <div>
            <asp:MultiView runat="server" ID="mv">
              <asp:View runat="server" ID="vw1">First view - static content</asp:View>
              <asp:View runat="server" ID="vw2">
                Second view - dynamically loaded content (between dashes): 
                <div>#<span id="divDyn"></span>#</div>
              </asp:View>
            </asp:MultiView>
          </div>
        </ContentTemplate>
      </asp:UpdatePanel>
  </div>
  </form>
</body>
</html>

_ScriptManager.js (这里我只是在id = divDyn的span中添加一些动态内容):

function dynamic() {
  alert('dynamic');
  $('#divDyn').text('Dynamic!');
}

_ScriptManager.aspx.cs 代码隐藏:

public partial class ScriptManagerTest : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        btnFirst.Click += delegate { mv.SetActiveView(vw1); };
        btnSecond.Click += delegate { mv.SetActiveView(vw2); };

        if (!IsPostBack)
        {
            // Test 1: does not work
            mv.SetActiveView(vw1);

            // Test 2: works, because required script is loaded on initial page request
            //mv.SetActiveView(vw2);
        }
    }

    protected override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);

        if (mv.GetActiveView() == vw2)
        {
            // Not calling the RegisterClientScriptInclude
            // makes the alert work in both cases, but this is
            // what it's all about: including script only when
            // needed!
            ScriptManager.RegisterClientScriptInclude(
                Page, Page.GetType(), "include-js",
                ResolveClientUrl("~/ScriptManager.js"));
            ScriptManager.RegisterStartupScript(
                this, GetType(), "call-dynamic",
                "alert('hi there'); dynamic();", true);    
        }
    }
}

1 个答案:

答案 0 :(得分:10)

嗯,这是破碎的:在调查问题的两个2小时后,尝试使用ScriptManager的所有可能性,尝试使用jQuery,最后编写这个示例(因为真实世界的设置总是更复杂),我现在发现this short blog post解决了我的问题 - 在js文件中添加了一行:

<强> _ScriptManager.js

function dynamic() {
  alert('dynamic');
  $('#divDyn').text('Dynamic!');
}
// notify that the script has been loaded <-- new!
if (typeof (Sys) !== 'undefined') Sys.Application.notifyScriptLoaded();

好吧,也许这对任何其他人都有用......