在asp.net ajax中使用javascript

aspx

    <form id="form1" runat="server">

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

    </form>

cs

    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");
        cs.RegisterClientScriptBlock(this.GetType(), "HelloWorld", "function helloWorld(){alert(1);}", true);
        cs.RegisterClientScriptInclude("HelloWorld", "HelloWorld.js");
        // cs.RegisterClientScriptResource(
        cs.RegisterExpandoAttribute(this.Button1.ClientID, "Hello", "World");
        cs.RegisterHiddenField("hello", "world");
        cs.RegisterOnSubmitStatement(this.GetType(), "HelloWorld", "return window.confirm('Do you really want to submit the form?')");
        cs.RegisterStartupScript(this.GetType(), "HelloWorld", "<script>alert('The page has loaded!')</script>");
    }

点击Button1后生成的html

    <form name="form1" method="post" action="ClientScriptManager.aspx" onsubmit="javascript:return WebForm_OnSubmit();" id="form1">
<div>
<input type="hidden" name="hello" id="hello" value="world" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKMTQ2OTkzNDMyMWRkXQusG/GEJI5thnlOYBE9TxuzDXA=" />
</div>


<script type="text/javascript">
//<![CDATA[
function helloWorld(){alert(1);}//]]>
</script>

<script src="HelloWorld.js" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
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" />

    
<script type="text/javascript">
//<![CDATA[
var Hello =  new Array(1, 2, 3);
//]]>
</script>

<script type="text/javascript">
//<![CDATA[
var Button1 = document.all ? document.all["Button1"] : document.getElementById("Button1");
Button1.Hello = "World";
//]]>
</script>

<div>

    <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWAgLg9frACwKM54rGBnQtBc2fVh5CkTBe8MjX+hmuyng2" />
</div>
<script>alert('The page has loaded!')</script></form>

注意使用RegisterStartupScript方法生成的javascript是添加到</form>标签前面的
而是用RegisterClientScriptBlock方法成的javascript是添加到<form>后面的，生成的位置不一样