使用 jquery ajax 传递数据
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Passing data with jquery ajax
提问by Tyler Durden
I always get the 'error' alert, and I can't figure out what's wrong. I'm just trying to get back the string ("testexpression") that I send. It has to be something with the data part, because without a parameter it works.
我总是收到“错误”警报，我无法弄清楚出了什么问题。我只是想取回我发送的字符串（“testexpression”）。它必须与数据部分有关，因为没有参数它就可以工作。
Here's the jquery part:
这是jquery部分：
<script>
$("#meaning").blur(function () {
$.ajax({
type: "POST",
url: '/GetMeaning/',
data: {"expression" : "testexpression"},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: successFunc,
error: errorFunc
});
function successFunc(data, status) {
$("#dictionaryDropDown").html(data);
}
function errorFunc() {
alert('error');
}
})
</script>
And this is the controller:
这是控制器：
public class GetMeaningController : Controller
{
//
// GET: /GetMeaning/
[HttpGet]
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult Index(string expression)
{
return Json(expression, JsonRequestBehavior.AllowGet);
}
}
(update: the type is post, I was just trying it out with get as well, and I left it in)
（更新：类型是 post，我也只是用 get 尝试了一下，我把它留在了）
回答by Dennis Flagg
You need to send data as a string/json. You are sending a javascript object. Also, The URL might need to be a absolute url and not a relative url
您需要将数据作为字符串/json 发送。您正在发送一个 javascript 对象。此外，该 URL 可能需要是绝对 url 而不是相对 url
$("#meaning").blur(function () {
$.ajax({
type: "POST",
url: '/GetMeaning/',
data: JSON.stringify({expression: "testexpression"}),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: successFunc,
error: errorFunc
});
function successFunc(data, status) {
$("#dictionaryDropDown").html(data);
}
function errorFunc() {
alert('error');
}
})
回答by beautifulcoder
On the back end side I recommend
在后端，我推荐
return Json(
new { this.expression = expression },
JsonRequestBehavior.AllowGet);
Assuming you want to send back an actual JSON and not just some random string.
假设您想发回一个实际的 JSON 而不仅仅是一些随机字符串。
