Ajax call Into MVC Controller- Url Issue

问题:

I've looked at the previously-posted jQuery/MVC questions and haven't found a workable answer.

I have the following JavaScript code:

$.ajax({
 type: "POST",
 url: '@Url.Action("Search","Controller")',
 data: "{queryString:'" + searchVal + "'}",
 contentType: "application/json; charset=utf-8",
 dataType: "html",
 success: function (data) {
 alert("here" + data.d.toString());
 }
});

When calling the Url the post looks like :

NetworkError: 500 Internal Server Error - <a href="http://localhost/Web/Navigation/@Url.Action(%22Search%22,%22Chat%22)"></a> 

Could someone please explain to me why does it return it like this ( the logic behind it ) and offer me a valid solution. Thanks in advance!
P.S.: Additional Information: %22 is the URL Encoding Reference for <<">> character

回答1:

In order for this to work that Javascript must be placed within a Razor view so that the line

@Url.Action("Action","Controller")

is parsed by Razor and the real value replaced.

If you don't want to move your Javascript into your View you could look at creating a settings object in the view and then referencing that from your Javascript file.

e.g.

var MyAppUrlSettings = {
    MyUsefulUrl : '@Url.Action("Action","Controller")'
}

and in your .js file

$.ajax({
 type: "POST",
 url: MyAppUrlSettings.MyUsefulUrl,
 data: "{queryString:'" + searchVal + "'}",
 contentType: "application/json; charset=utf-8",
 dataType: "html",
 success: function (data) {
 alert("here" + data.d.toString());
});

or alternatively look at levering the framework's built in Ajax methods within the HtmlHelpers which allow you to achieve the same without "polluting" your Views with JS code.

回答2:

you have an type error in example of code. You forget curlybracket after success

$.ajax({
 type: "POST",
 url: '@Url.Action("Search","Controller")',
 data: "{queryString:'" + searchVal + "'}",
 contentType: "application/json; charset=utf-8",
 dataType: "html",
 success: function (data) {
     alert("here" + data.d.toString());
 }
})

;

回答3:

A good way to do it without getting the view involved may be:

$.ajax({
    type: "POST",
    url: '/Controller/Search',
    data: { queryString: searchVal },
    success: function (data) {
      alert("here" + data.d.toString());
    }
});

This will try to POST to the URL:

"http://domain/Controller/Search (which is the correct URL for the action you want to use)"

回答4:

Starting from Rob's answer, I am currently using the following syntax.Since the question has received a lot of attention,I decided to share it with you :

var requrl = '@Url.Action("Action", "Controller", null, Request.Url.Scheme, null)';
  $.ajax({
   type: "POST",
   url: requrl,
   data: "{queryString:'" + searchVal + "'}",
   contentType: "application/json; charset=utf-8",
   dataType: "html",
   success: function (data) {
   alert("here" + data.d.toString());
   }
  });

回答5:

starting from mihai-labo's answer, why not skip declaring the requrl variable altogether and put the url generating code directly in front of "url:", like:

 $.ajax({
    type: "POST",
    url: '@Url.Action("Action", "Controller", null, Request.Url.Scheme, null)',
    data: "{queryString:'" + searchVal + "'}",
    contentType: "application/json; charset=utf-8",
    dataType: "html",
    success: function (data) {
        alert("here" + data.d.toString());
    }
});

回答6:

Simple way to access the Url Try this Code

 $.ajax({
     type: "POST",
      url: '/Controller/Search', 
     data: "{queryString:'" + searchVal + "'}",
     contentType: "application/json; charset=utf-8",
     dataType: "html",
     success: function (data) {
     alert("here" + data.d.toString());
    });