Converting MVC Ajax to Jquery - ajax

Question

I am in the process of learning how to convert MVC Ajax to jquery ajax so I can do more.
This is the old ajax, I took out the loading stuff
#Ajax.ActionLink("Update Tweets", "Index", "Home",
new AjaxOptions
{
UpdateTargetId = "TweetBox",
InsertionMode = InsertionMode.InsertBefore,
HttpMethod = "Get",
})
I need to convert this to jquery ajax. It seems to be working lets see the code
<script>
$(document).ready(function () {
$("#StartLabel").click(function (e) {
$.ajax({
type: "Get",
url: '/Home/Index',
// data: "X-Requested-With=XMLHttpRequest",
// contentType: "application/text; charset=utf-8",
dataType: "text",
async: true,
// cache: false,
success: function (data) {
$('#TweetBox').prepend(data);
alert('Load was performed.');
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(textStatus);
},
complete: function (resp) {
alert(resp.getAllResponseHeaders());
}
});
});
});
</script>
In the microsoft ajax it sets XML Request in the headers. Do I need to add that too? I am just paging my controller that performs a query to twitter and appends the data to the top.
I am using fiddler to see how the requests are different but the results are the same.
I also noticed if i put the text in the data: object its puts it in the header. i dont think that is right by any means.

Answer 1

You could define a normal anchor:
#Html.ActionLink("Update Tweets", "Index", "Home", null, new { id = "mylink" })
And then unobtrusively AJAXify it:
$(document).ready(function () {
$("#mylink").click(function (e) {
$.ajax({
type: "GET",
url: this.href,
success: function (data) {
$('#TweetBox').prepend(data);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(textStatus);
},
complete: function (resp) {
alert(resp.getAllResponseHeaders());
}
});
return false;
});
});
Notice that I return false from the click handler in order to cancel the default action. Also notice that I am using the anchor's href property instead of hardcoding it.
The 2 AJAX requests should be identical.

Answer 2

Here is simple example using Ajax with Jason data
// Post JSON data
[HttpPost]
public JsonResult JsonFullName(string fname, string lastname)
{
var data = "{ \"fname\" : \"" + fname + " \" , \"lastname\" : \"" + lastname + "\" }";
return Json(data, JsonRequestBehavior.AllowGet);
}
in the view add a reference to the query as following
#section Scripts{
<script src="~/Scripts/modernizr-2.6.2.js"></script>
<script src="~/Scripts/jquery-1.8.2.intellisense.js"></script>
<script src="~/Scripts/jquery-1.8.2.js"></script>
<script src="~/Scripts/jquery-1.8.2.min.js"></script>
}
in the view add the js
note: (jsonGetfullname).on is a button
<script type="text/javascript">
$("#jsonGetfullname").on("click", function () {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "#(Url.Action("JsonFullName", "Home"))",
data: "{ \"fname\" : \"modey\" , \"lastname\" : \"sayed\" }",
dataType: "json",
success: function (data) {
var res = $.parseJSON(data);
$("#myform").html("<h3>Json data: <h3>" + res.fname + ", " + res.lastname)
},
error: function (xhr, err) {
alert("readyState: " + xhr.readyState + "\nstatus: " + xhr.status);
alert("responseText: " + xhr.responseText);
}
})
});
</script>
you can also use (POST\GET) as following:
[HttpPost]
public string Contact(string message)
{
return "<h1>Hi,</h1>we got your message, <br />" + message + " <br />Thanks a lot";
}
in the view add the js
note: (send).on is a button
$("#send").on("click", function () {
$.post('', { message: $('#msg').val() })
.done(function (response) {
setTimeout(function () { $("#myform").html(response) }, 2000);
})
.error(function () { alert('Error') })
.success(function () { alert('OK') })
return false;
});