ClientScriptManager与ScriptManager向客户端注册脚本的区别

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使用ClientScriptManager向客户端注册脚本

ClientScriptManager在非异步（就是说非AJAX）环境下使用的。如果要在异步环境下注册脚本应该使用ScriptManager的静态方法来注册（ScriptManager兼容异步于非异步环境下注册脚本）。ClientScriptManager中注册脚本的方法在ScriptManager中都有一一对应的方法，但是有一些区别，ScriptManager中的方法多了一个参数（多了第一个参数），而且使用ScriptManager来注册脚本不是绝对能注册成功的。

.aspx文件代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ClientScriptManager.aspx.cs" Inherits="Demo4_ClientScriptManager" %>

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

<title>ClientScriptManager</title>

</head>

<body>

<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

</form>

</body>

</html>

.aspx.cs文件代码

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class Demo4_ClientScriptManager : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

ClientScriptManager cs = this.ClientScript;

cs.RegisterArrayDeclaration("Hello", "1, 2, 3");//#1

cs.RegisterClientScriptBlock(this.GetType(), "HelloWorld", "function helloWorld(){alert(1);}", true);//#2

cs.RegisterClientScriptInclude("HelloWorld", "HelloWorld.js");//#3

cs.RegisterExpandoAttribute(this.Button1.ClientID, "Hello", "World");//#4

cs.RegisterHiddenField("hello", "world");//#5

cs.RegisterOnSubmitStatement(this.GetType(), "HelloWorld", "return window.confirm('Do you really want to submit the form?')");//#6

cs.RegisterStartupScript(this.GetType(), "HelloWorld", "<script>alert('The page has loaded!')</script>");//#7

}

生成页面的HTML代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head><title>ClientScriptManager</title></head>

<body>

<form

"id="form1"

name="form1"

method="post"

action="ClientScriptManager.aspx"

onsubmit="javascript:return

WebForm_OnSubmit();>

<div>

</div>

<!--

function helloWorld(){alert(1);}// -->

</script>

<!--

function WebForm_OnSubmit() {

return window.confirm('Do you really want to submit the form?');

return true;

}

// -->

</script>

<!--

var Hello = new Array(1, 2, 3);

// -->

</script>

<!--

var Button1 = document.all ? document.all["Button1"] : document.getElementById("Button1");

Button1.Hello = "World";

// -->

</script>

<div>

<input

type="hidden"

name="__EVENTVALIDATION" id="__EVENTVALIDATION"

value="/wEWAgKet4KWBgKM54rGBikWLuZSHp4emnxNA3F0qTbFNfuo" />

</div>

</form>

</body>

</html>

使用ScriptManager向客户端注册脚本

使用ScriptManager来向客户端注册脚本时，不一定每次都会成功生效，只有UpdatePanel更新了，才会注册成功。因为注册脚本的行为是在UpdatePanel更新后执行的。

.aspx文件代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ScriptManagerReg.aspx.cs" Inherits="Demo5_ScriptManagerReg" %>

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

<title>ScriptManagerReg</title>

</head>

<body>

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<%= DateTime.Now %>

<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click1" />

</ContentTemplate>

</asp:UpdatePanel>

<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">

<%= DateTime.Now %>

</ContentTemplate>

</asp:UpdatePanel>

</form>

</body>

</html>

.aspx.cs文件代码

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class Demo5_ScriptManagerReg : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click1(object sender, EventArgs e)

{

//#1

ScriptManager.RegisterStartupScript(this.UpdatePanel1, this.GetType(), "UpdatePanel1", "alert(1)", true);

//#2

ScriptManager.RegisterStartupScript(this.UpdatePanel2, this.GetType(), "UpdatePanel2", "alert(2)", true);

}

说明

运行程序后，第一个时间会更新，更新后会alert(1);

因为UpdatePanel2的UpdateMode="Conditional"，不是每次都更新，所以不会有alert(2);

只要UpdatePanel2的UpdateMode="Always"，则UpdatePanel2每次都更新，因为能更新了，所以alert(2);就会注册成功。

原文连接：http://www.cnblogs.com/jienet/archive/2007/12/08/987861.html