ASP. NET MVC2 in action Reading Notes [12-4] MVC Ajax helpers

Index. aspx:

 
<Script SRC= ".../Scripts/jquery-1.3.2.js" Type= "Text/JavaScript"> </Script>
 

 
<SCRIPT src =".../Scripts/microsoftajax. js"Type ="Text/JavaScript"> </SCRIPT>
 

 
<SCRIPT src =".../Scripts/microsoftmvcajax. js"Type ="Text/JavaScript"></Script>
 

<H3>Ajax. beginform</H3>
 

 
<H4>Comments</H4>
 

 
<Ul ID= "Comments">
 

 
</Ul>
 

<% Using(Ajax. beginform ("Addcomment",NewAjaxoptions
 

 
{
 

 
Httpmethod ="Post",
 

 
Updatetargetid ="Comments",
 

 
Insertionmode = insertionmode. insertafter
 

 
})){%>
 

<%= Html. textarea ("Comment",New{Rows = 5, cols = 50 })%>
 

 
<Button Type= "Submit">Add Comment</Button>
 

 
<%}%>
 

 
<H3>Ajax. Link</H3>
 

<%= Ajax. actionlink ("Show the Privacy Policy","Privacypolicy",
 

 
NewAjaxoptions {insertionmode = insertionmode. Replace, updatetargetid ="Privacy"})%>
 

 
<Div ID= "Privacy"> </Div>
 

 

Ajaxhelperscontroller. CS:

 
Public ClassAjaxhelperscontroller: Controller
 

 
{
 

PrivateIlist <String> _ Comments =NewList <String> ();
 

 
PublicActionresult index ()
 

 
{
 

 
ReturnView (_ Comments );
 

 
}
 

 
[Httppost]
 

 
PublicActionresult addcomment (StringComment)
 

 
{
 

 
_ Comments. Add ("<Li>"+ Comment +"</LI>");
 

ReturnContent (String. Join ("\ N", _ Comments. toarray ()));
 

 
}
 

 
PublicActionresult privacypolicy ()
 

 
{
 

 
Const StringPrivacytext =@"
 

 
<H2> our commitment to privacy </H2>
 

 
Your privacy is important to us. To better protect your privacy we provide this notice explaining our online
 

 
Information practices and the choices you can make about the way your information is collected and used.
 

To make this notice easy to find, we make it available on our homepage and at every point where personally
 

 
Identifiable information may be requested .";
 

 
ReturnContent (privacytext,"Text/html");
 

 
}
 

 
}