C#向前台页面中输出JS代码

//需要注意的是
//当向页面输出带有相同的Type和Key的的参数时可以避免重复输出
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//在UpdatePanel以外按钮输出JS方法

ClientScriptManager cs = this.ClientScript;

cs.RegisterArrayDeclaration("Hello", "1, 2, 3");
//输出结果：
//<script type="text/javascript">
//var Hello =  new Array(1, 2, 3);
//</script>

cs.RegisterClientScriptInclude("HelloWorld", "HelloWorld.js");
//输出结果：
//<script src="HelloWorld.js" type="text/javascript"></script>

//// cs.RegisterClientScriptResource(

cs.RegisterExpandoAttribute(this.Button1.ClientID, "Hello", "World");
//输出结果：
//向Button1按钮注册一个Hello的属性
//<script type="text/javascript">
//var Button1 = document.all ? document.all["Button1"] : document.getElementById("Button1");
//Button1.Hello = "World";
//</script>

cs.RegisterHiddenField("hello", "world");
//输出结果：
//<input type="hidden" name="hello" id="hello" value="world" />

cs.RegisterOnSubmitStatement(this.GetType(), "HelloWorld", "return window.confirm('Do you really want to submit the form?')");
//输出结果：
//（OnSubmit）事件，点击按钮指出提示框
//<script type="text/javascript">
//function WebForm_OnSubmit() {
//return window.confirm('Do you really want to submit the form?');
//return true;
//}
//</script>

cs.RegisterClientScriptBlock(this.GetType(), "HelloWorld", "function helloWorld(){alert(1);}", true);
//输出结果：
//在页面顶部
//<script type="text/javascript">
//function helloWorld(){alert(1);}
//</script>

cs.RegisterStartupScript(this.GetType(), "HelloWorld", "<script>alert('The page has loaded!')</script>");
//输出结果：
//在页面底部
//<script>alert('The page has loaded!')</script>

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//在UpdatePanel以内按钮输出JS方法

//为某个UpdatePanel输出JS脚本
//注：只有当按钮所在的UpdatePanel更新时此方法生效
ScriptManager.RegisterStartupScript(this.UpdatePanel1, this.GetType(), "UpdatePanel1", "alert(1)", true);

//为当前页面输出JS脚本
//注：无论当前UpdatePanel是否更新都向页面输出JS脚本
ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "UpdatePanel2", "alert(2)", true);