用Page.ClientScript.RegisterClientScriptBlock 和Page.ClientScript.RegisterStartupScript：区别:
<%@ Page Language =”C#”
<script runat =”server”>
protected Page_Load( object sender, EventArgs e)
{
string myScript = @”function AlertHello() { alert(‘Hello ASP.NET’); } ”;
Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
“MyScript”, myScript, true);
}
</script>
运行结果如下：
<html
<head><title>
Adding JavaScript
</title></head>
<body>
<form
<div>
<input
value=”/wEPDwUKMTY3NzE5MjIyMGRkiyYSRMg+bcXi9DiawYlbxndiTDo=”
</div>
<script
<!--
function AlertHello() { alert(‘Hello ASP.NET’); } // -->
</script>
<div>
<input
id=”Button1”
</div>
</form>
</body>
</html>
2.使用Page.ClientScript.RegisterStartupScript
RegisterStartupScript 方法与RegisterClientScriptBlock方法最大的不同是：RegisterStartupScript 把script放置在 ASP.NET page的底部，而RegisterClientScriptBlock把script放置在ASP.NET page的顶部。
如果你的页面中有如下代码：
<asp:TextBox ASP.NET </asp:TextBox>
c#
protected Page_Load( object sender, EventArgs e)
{
string myScript = @”alert(document.forms[ 0][‘TextBox1’].value);”;
Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
“MyScript”, myScript, true);
}
此页面运行时会报错，原因是JavaScript function先于text box被安放于浏览器。因此JavaScript function找不到TextBox1。
c#
protected Page_Load( object sender, EventArgs e)
{
string myScript = @”alert(document.forms[ 0][‘TextBox1’].value);”;
Page.ClientScript.RegisterStartupScript(this.GetType(),
“MyScript”, myScript, true);
}
这段代码把JavaScript function放置于ASP.NET page底部，因此JavaScript运行时它能找到TextBox1。
3.使用Page.ClientScript.RegisterClientScriptInclude
许多开发者把JavaScript放置在.js文件中，使用RegisterClientScriptInclude方法可以注册.js文件中的JavaScript。
c#
string myScript = “myJavaScriptCode.js”
Page.ClientScript.RegisterClientScriptInclude(“myKey”, myScript);
这将在ASP.NET页面产生如下结构：
<script src=”myJavaScriptCode.js” type=”text/javascript”></script>
c#
<%@ <script protected 
string 
Page.ClientScript.RegisterClientScriptBlock(this.GetType(),“MyScript”, }</script>运行结果如下：
<html <head><title>Adding <body><form <div><input value=”/wEPDwUKMTY3NzE5MjIyMGRkiyYSRMg+bcXi9DiawYlbxndiTDo=” </div><script <!--function </script><div><input id=”Button1” </div></form></body></html>2.使用Page.ClientScript.RegisterStartupScript
RegisterStartupScript 方法与RegisterClientScriptBloc
如果你的页面中有如下代码：
<asp:TextBox c#
protected string Page.ClientScript.RegisterClientScriptBlock(this.GetType(),“MyScript”, }c#
protected string Page.ClientScript.RegisterStartupScript(this.GetType(),“MyScript”, }3.使用Page.ClientScript.RegisterClientScriptInclude
许多开发者把JavaScript放置在.js文件中，使用RegisterClientScriptIncl
c#
string Page.ClientScript.RegisterClientScriptInclude(“myKey”, <script src=”myJavaScriptCode.js” type=”text/javascript”></script>