ClientScriptManager与ScriptManager向客户端注册脚本的区别
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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ClientScriptManager</title>
</head>
<body>
<form id="form1" runat="server">
<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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head><title>ClientScriptManager</title></head>
<body>
<form
"id="form1"
name="form1"
method="post"
action="ClientScriptManager.aspx"
onsubmit="javascript:return
WebForm_OnSubmit();>
<div>
<!-- #5 -->
<input type="hidden" name="hello" id="hello" value="world" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKMTQ2OTkzNDMyMWRkdcWxeVaF9qGYsIaDUa9Rcaihgnk=" />
</div>
<!-- #2 -->
<script type="text/javascript">
<!--
function helloWorld(){alert(1);}// -->
</script>
<!-- #3 -->
<script src="HelloWorld.js" type="text/javascript"></script>
<!-- #6 -->
<script type="text/javascript">
<!--
function WebForm_OnSubmit() {
return window.confirm('Do you really want to submit the form?');
return true;
}
// -->
</script>
<input type="submit" name="Button1" value="Button" id="Button1" />
<!-- #1 -->
<script type="text/javascript">
<!--
var Hello = new Array(1, 2, 3);
// -->
</script>
<!-- #4 -->
<script type="text/javascript">
<!--
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>
<!-- #7 -->
<script>alert('The page has loaded!')</script>
</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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ScriptManagerReg</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<%= DateTime.Now %>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click1" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<%= 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。
