Jquery - Return Error From MVC Action?
Mar 4, 2010
I am using ASP.NET MVC for developing a web site. I am using jquery for AJAX functionality. In the action methods, I want to return some error to signal that the input is not correct or that the action could not be performed. In such error cases, I expect the jquery ajax error handler to be called and I can take appropriate action in there. I have not found a way how to do this. Following is my action method.In error cases, what should I be sending from an Action in order to get the jquery error handler triggered?
public ActionResult AddToFavourites(int entityId, string entityType)
{
if (!Request.IsAjaxRequest())
[code]...
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May 14, 2010
I am using ASP.NET MVC with jquery. I have the following MVC Action that returns a partial page on Success. On Application Error, I am not sure what to send it for correctly handling it at the client side.
public ActionResult LoadFilterSet(int filterSetId)
{
try
{
BreadCrumbManager bcManager = this.ResetBreadCrumbManager(this.BreadCrumbManagerID);
GeneralHelper.LoadBreadCrumbManager(bcManager, filterSetId);
ViewData["BreadCrumbManager"] = bcManager;
return View("LoadFilterSet");
}
catch (Exception ex)
{
return Content("");
}
}
Following is my jquery ajax call. Notice that I am checking for the data length to make sure there are no errors. Please suggest me a better way of doing this.
$.ajax({
type: "GET",
dataType: "html",
async: true,
data: ({ filterSetId: selectedId }),
url: link,
contentType: "text/html; charset=utf-8",
success: function(data, textStatus) {
if (data.length > 0) {
// Clear the local filters first.
clearLocalFilters();
$('td.selected-filters table.filters-display').append(data);
}
}
});
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Jul 12, 2010
I am calling a file download action from javascript:
$elem.click(function() {
window.location.href = 'MyController/MyFileDownloadAction';
});
The controller returns a file:
[code]...
This action has a pretty high likelyhood of throwing an exception (or at least not being able to return the file).
Due to the nature of the application (which contains a lot of dynamic content), I can't really redirect to an error page in this situation. The current page needs to stay open somehow.
So I'm ideally looking for something like a javascript pop-up, but afaik this isn't going to be possible since I don't know any way to return a javacript instruction in a non-ajaxed controller call. If I display an error page I need to force it to open in a new window some how. Is there any possible solution to this problem?
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Nov 16, 2010
I am using the following code to post data from a asp.net 2.0 site to an asp.net 2.0 web service that post the data to a server:
$.ajax({
type: "POST",
url: "SynchroniseCustomers.asmx/synchroniseCustomers",
data: JSON.stringify(customerObj),
[Code]....
Thing is, if I run this locally and drop my internet connection the web service returns a 500 error (like I want it to do) and deleteCustomer(customer.id); is not called. However, on the live site if I drop my connection the web service does not return an error and deleteCustomer(customer.id); is called even if I don't have a connection to the internet (customer gets deleted from local database without being posted to the web server).
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Jan 13, 2011
I have two views which will both use the same Controller method:
//webServiceController.cs
//The actual method is about 40 lines of code. Truncated for readability.
public ActionResult Index()
{
object i = new List<WebServiceMethod>(); [code].....
The second view is a quick'n'dirty conversion to JSON so that I can do magical AJAX tricks with the data:
<%
// AjaxGetServiceData.aspx
// Convert web service response object into JSON for AJAX.
var jss = new System.Web.Script.Serialization.JavaScriptSerializer();
Response.Write(jss.Serialize(Model));
%>
I'd created a duplicate of the Index() method and called it AjaxGetServiceData(), but that defeats the purpose of MVC.
Resolution:I didn't ask my question very well, as evidenced by a 5-10 minute discussion I just had with a coworker about this very topic. He kept asking me the same question that many users on this page asked me: "How does the controller know which view to return?" I responded, "That's what I'm trying to figure out." I was trying to get the method to return a different view (or Json output) when AJAX was the requester. A string argument in the method was my solution.
This is what I ended up using to get my desired effect:
public ActionResult Index(string isJSON = "no")
{
/// ...All the code from before...[code]....
Then, when I want the JSON version, in my AJAX request I specify the URL as /MyController/Index/?isJSON=yes When I want my pretty table view, I just use /MyController/
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Feb 24, 2011
Without giving away specifics: basically, I have a bunch of users adding content to my site. What happens now is ajax sends the text to a web service which does its thing, sends the info to the DB, Sends the user an e-mail, and then returns a response to the browser to do something.
What I would like to do is change that order. I want to return a response to the browser so the user is not waiting on the e-mail to send before they get their response. Basically, I'm trying to gain every milisecond I can to quicken the response, and there's no reason for the user to wait for the server to send their e-mail before it tells them that everything worked ok. If the info went to the DB, that's all the user needs to know, they'll know the e-mail sent when it shows up in their inbox. I notice this is an issue on my local machine which has no SMTP server and can actually hang the page response up for a few extra seconds because it's throwing errors trying to send something with no SMTP server.
So, I know in my function when I say
[Code]....
it WORKS, but I want to send the e-mail after the return. Is there ANY way to get this to happen?
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Mar 26, 2011
I have a controller with several actions that all return a set of data that's the same among them all. Instead of adding the data to the ViewBag in every single action, is there some pattern or attribute or something I can call or set to add the same data to the viewdata or viewbag for every action, or some other better way to perform the get the same data in every view without calling the method in every action?
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Jan 11, 2011
i am trying return a double value from controller action. when i alert(result) it works well but when i return a function it did not work. alert undefined value.
//this is action
public ActionResult GetPrice(int id)
{
double price = ProductList.Where(d => d.ID.Equals(id)).Single().Price;
return Json(price, JsonRequestBehavior.AllowGet);
}
when i click $('#btnAdd') i wanna get price
$(document).ready(function () {
$('#btnAdd').click(function () {
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Jan 17, 2011
When I write this
[Code]....
which makes things quite tedious. Wouldn't it be easier if UrlHelper.Action returned MvcHtmlString?
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Mar 14, 2011
I am trying to return some data as json from an action method.
I have an employee object that looks like this:
public class Employee
{
public int EmployeeID {get; set;}
public string FirstName {get; set;}
public string LastName {get; set;}
//Other irrelevant properties
}
Then I have a view model as follows
public Class EmployeeViewModel
{
public Employee Supervisor{get; set;}
public List<EmployeeViewModel> Employees
}
I need to return a json object that looks exactly like this:
{id: 1, name: John, children: [
{id: 1, name: Joe, children: []},
{id: 1, name: Rob, children: []}
]}
For now I only need to go to the second level as above, returning and supervisor and their staff members beneath them.
How would I go about returning this in my action method(I have the viewModel object hydrated already I just need to return it as json). My problem so far has been that the children property does not get populated.
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Nov 6, 2010
How does a controller action return an HTML stream as the View? ( in place of the name of the View file )
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( thinking about it, better to have a general purpose view in a folder named "Common". Then pass the message text in ViewData. Still curious to know how to return an html stream. )
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Sep 28, 2010
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Jan 31, 2011
If I use jQuery AJAX to call a specific ASP.NET page method how to have that method return a value back to the AJAX method that called it?
Update
My situation is I have an existing web application with many existing methods. I would like to be able to use jQuery to execute some of these methods and then update the UI with the results. My mandate is to stay away from ASP.NET AJAX and stick with jQuery. Management is concerned about continued development and support with ASP.NET AJAX from Microsoft. I agree with them.
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[code]....
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Feb 17, 2011
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[Code]....
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Oct 15, 2010
[Code]....
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Oct 19, 2010
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public ActionResult Edit(int id)
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[code]...
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Feb 15, 2011
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[code]....
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Oct 19, 2010
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Here's my javascript code:
[Code]....
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[Code]....
company.Id has a value of 10, but company.User.Id is 0. what I'm doing wrong? I've not named any properties incorrectly, by the way.
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May 28, 2010
How to secure an Action filtered with Authorize method from a jQuery call? I have this Authorize filter and it work's cause users are redirected if not logged-in. But after logging-out then accessing previous open pages that needs authorization, they weren't redirected at all. This jQuery is initialize when a button is clicked,
jQuery.post(
"/controllername/IsUserActive", {
}, function (data) {
if (data){
$('#div_user_active').html(data);
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$('#div_user_active').html('Not Active');
}
}
);
then calls this Action method.
<Authorize()> _
Function IsUserActive() As Boolean
Return True '<<---this keeps returning even users are already logged-out.
End Function
Overall, I wanted ajax(jQuery) to update/read a portion of the page but gets redirected if not authorized.
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Feb 9, 2011
I have asp.net mvc application. i want to configure the object in jquery and want to pass it to the the action of controller . where as in my script i am using this for configure data for the ajax call:
[Code]....
it does not calls to action in controller. i think here :
var json = $.toJSON(peform);
is not working as expect. is it need to add any js file to reference ? or mistake in syntax?
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Jul 2, 2010
Let say I got the following button : <asp:Button ID="btnSearch" runat="server" /> and the following button event handler: Protected Sub btnSearch_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSearch.Click ow, with JQuery, can I call the button event handler ? What I mean is that I don't want the page to refresh, so it's kind of Ajax call. I don't want to simulate the click but that on click the button event handler is call.
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Nov 17, 2010
How do I call and action/controller from inside a jquery function?
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Dec 27, 2010
I'm trying to call an action method in an MVC application using jQuery. Basically what I want is to take the value of a couple of input fields and call the action method by clicking a button, passing the values of the input fields as parameters. But I only get the value of the "number" parameter, not the "year" parameter.
function selectWeek() {
$('#selectWeekButton').click(function (event) {
var number = $("#selectWeekId").val();
[code]...
I checked the url with an alert, as you can see, and it seems to contain both values fine. But when I check the value of the year parameter in the action method it is null.Here are the input fields:
<span>Vecka: </span>
<input type="text" id="selectWeekId" />
<span>År: </span>
<input type="text" id="selectYearId" />
<input type="button" value="Välj vecka" id="selectWeekButton" />
And the beginning of the action method:
public ActionResult Edit(string number, string year)
//etc...
I know that this looks like a strange thing to do instead of just binding fields, but the reason is that these input fields and their values is not the main purpose of this View. They're just there to select another week in this timesheet application. And besides, I'm going to replace the input fields with a jQuery calendar eventually, so I will still have to do something like this.
So what's the easiest way to do this, and why isn't it working as it is?
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