MVC :: Return Jsonp Data With Callback In 2
Jan 9, 2011Does anyone have a working example of returning jsonp data with callback in mvc 2 that they can share?
View 3 Replies
Similar Messages:
JSONP Callback Method Is Not Defined
Jun 9, 2010I'm trying to get a jsonp callback working using jquery within a greasemonkey script. Here's my jquery:
$.ajax({
[URL],
data: { authkey: "temphash" },
type: "get",
dataType: "json",
cache: false,
success: function(data) {
console.log(data);
}
});
in my webservice (asp.net) I'm returning the response with a content type of application/javascript. The response the server is actually sending back is: jsonp1276109314602({"message":"I'm getting tired of this not working"}) The jsonp1276109314602 method name is being randomly generated by jquery, and I'm grabbing it with Request.QueryString["callback"] However my success function is never called and the firebug console gives me an error saying jsonp1276109314602 is not defined. What am I doing wrong?
NOTE: I'm making this call from a greasemonkey script on a craigslist page. It's a cross-domain request, but I can see the request is actually making it to the server and returning a good response, but for whatever reason the registered callback that jquery creates appears to not exist when the response comes back. It works fine if I run the script in the firebug console from the craigslist page, but not when it's run from the greasemonkey script.
Jquery - Why Same Domain Ajax Request Adding Jsonp Callback Parameter
Feb 25, 2011I have a simple script making a request to the server:
var DTO = { 'path': path };
var url = 'default.aspx/Get';
var test;
$('#getInstance').click(function () {
$.ajax({
url: url,
type: 'POST',
dataType: 'json',
data: JSON.stringify(DTO),
contentType: 'application/json; charset=utf-8',
success: function (msg) {
test = msg;
},
error: function (jqXHR, textStatus, errorThrown) {
alert(textStatus);
alert(errorThrown);
}
});
});
This works fine as in it connects to the server and gets the data back, with one simple problem. It is treating this request as a cross domain request, therefore using jsonp. The server code is here:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static MyObject Get(string path)
{
MyObject foo = new MyObject();
return foo;
}
Normally this would not be a problem, except that I am accessing a WebMethod, and it doesnt have the capability to return a jsonp response (meaning it has no way to attach the callback function to the response. Now, if this was a manual response, I could hack it up and attach the parameter, but I am taking advantage of the built-in serialization, so no way to mess around with the response. [URL]
Let me just stress the fact that this code works. The only problem is jQuery treating this request as cross domain. But Why? UPDATE: Well, after many more hours and more testing I have narrowed this issue down to it being a bug in jquery 1.5.1. I did some testing with older versions (all 1.4 versions) and I had no problem, the request was made using JSON, and the response was received successfully. What could be the change they made that would consider this request a CORS?
JQuery :: Data Size While Making Cross Domain JSONP Call Using JQuery .ajax() Method
Dec 21, 2010I am developing web application and in application i need to make call of jQuery using .ajax(); method with datatype is set jsonp. Now all works well with limited data but problem start to occur when data size is increasing......
View 7 RepliesJsonp Cross Domain Only Working In IE
Apr 28, 2010EDIT: At first I thought it wasn't working cross domain at all, now I realize it only works in IE. I'm using jQuery to call a web service (ASP.NET .axmx), and trying to us jsonp so that I can call it across different sites. Right now it is working ONLY in IE, but not in Firefox, Chrome, Safari. Also, in IE, a dialog pops up warning "This page is accessing information that is not under its control..."
$.ajax({
type: "POST",
[URL],
dataType: "jsonp",
success: function(data) {
alert(data.prop1);
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.status + " " + textStatus + " " + errorThrown);
}
});
And the server code is:
[ScriptService]
public class TestService : System.Web.Services.WebService{
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public void HelloWorld() {
string jsoncallback = HttpContext.Current.Request["jsonp"];
var response = string.Format("{0}({1});", jsoncallback, @"{'prop1' : '" + DateTime.Now.ToString() + "'}");
HttpContext.Current.Response.Write(response);
}
}
Response.Write JSONP Using JQuery And WCF?
Nov 18, 2010UPDATE:
The service cannot be activated because it does not support ASP.NET compatibility. ASP.NET compatibility is enabled for this application. Turn off ASP.NET compatibility mode in the web.config or add the AspNetCompatibilityRequirements attribute to the service type with RequirementsMode setting as 'Allowed' or 'Required'.
when i try to access wcf service i get this error: the reason is HttpContext.Current is null, what should i do in this case?
Object reference not set to an instance of an object.
System.Web.Script.Serialization.JavaScriptSerializer s = new System.Web.Script.Serialization.JavaScriptSerializer();
Person p = new Person() { FirstName = "First name", LastName= "last name" };
string json = s.Serialize(p);
System.Web.HttpContext.Current.Response.Write("jsoncallback" + json);} //error
Jquery - How To Implement JSONP In Web Application
Dec 20, 2010How can I implement Jquery JSONP in my ASP.NET project. My application flow is described below:
1) I am opening a HTTP page, where I have got JQuery login dialog box, from which username and password is posted to my Login.aspx page, which has got one method "GetLoginDetails" which takes posted username and password and sends to a WEBSERVICE which checks the users name and password and return back with "success=true"
2) so in my response I get "success=true", I read that value from jquery and works according to responded text on my client side it display message "Logged in Successfully".
JQuery And Cross Domain With Jsonp?
Mar 29, 2011I am trying out jsonp with jQuery. I found many examples on the web and I believe my code is correct, but its still not working for me.
My web service:
using System.Web;
using System.Web.Script.Services;
using System.Web.Services;
using System.Web.Script.Serialization;..........
Firebug shows this is a success, but I am getting null from the alert. I have my webservice in iis7 locally and I am testing through my debug in my client project.
I need to get cross-domain working.
JSONP And Sharing Cookies From One Server To Another?
Jun 21, 2010I'm working on an intranet system (.NET 3.5); the main pages are served up from a standard ASP.NET server. I would like to use Ajax on those pages to contact a WCF service running on a different machine, to retrieve data, do CRUD operations - the usual Ajax stuff.
The problem I'm trying to resolve is: can I take cookies which were set by the ASP.NET server, and include them on requests to the WCF service? If so, how?
My understanding is that JSONP bypasses XSS restrictions by "wrapping" the Ajax request within a standard <script src="MyAjaxCall?SomeData=SomeValue"> tag. With that in mind, it would seem I'm at the mercy of the browser as to which cookies (if any) will be included in MyAjaxCall. Since the cookies originate from the ASP.NET server, the browser likely won't include them in the call to WCF.
Since this is an intranet application, I cannot necessarily rely on domain wildcarding (*.mydomain.com) to make sure the cookies are shared across multiple machines - the client may well be accessing machines by their simple network name or even IP address directly.
edit: accepting Julian's answer, since using JS to manually grab a cookie's payload and jam it onto the URL seems like the only way to work-around the restriction (tho it feels somewhat inelegant :)
MVC :: Creating A Custom Actionresult In 2 To Generate JSONP
Jan 3, 2011i have a need to generate JSONP using MVC 2 for a 3rd party App...It seems there is no actionresult for this OOTB in MVC 2 so i need to create a custom one..i found the following article on such here; [URL] My first question is...Where do i put the custom actionresult code? Secondly...How can i use this to new JSONP actionresult to return data from my data model? Currently , my current JSON actionresult (remember..i need JSONP) looks like this;
[Code]....
How can i use the new JSONP Actionresult to return db.GetTopGainers()?
MVC :: 2.0 Futures REST - Cross Domain - JSONP
May 5, 2010I´m using mvc futures 2 with WebApiEnabled for XML and JSON support. But due to cross domain issues with jQuery $.ajax I´m lookin in to JSONP. Is there a simple way to extend futures rest function for JSONP or should I do something else.
View 1 RepliesWCF / ASMX :: Enabling JSONP For Authenticated Users?
Mar 6, 2011We have a series of Silverlight apps that use WCF services via SOAP for just about everything. As we migrate to AJAX we've been hoping to expose the same services via JSONP with little more than config changes on the server.Although the message "Cross domain javascript callback is not supported in authenticated services" seems pretty explicit, I'm hoping there might be a way to allow it. We have a need to expose user-centric data across domains, but we'll need to roll our own JSONP to make it happen if this is a hard "unsupported". It would be even better if there was a way for the server to validate the referrer against the client access policy we provide for Silverlight clients, but for now we just need the general requests to not fail if the user happens to have an auth cookie for our domain from a previous visit.f there's no way to allow this to just work, we're also considering the option of channeling the requests through an IFRAME, but we're definitely open to other recommendations.
View 2 RepliesForms Data Controls :: Invalid Postback Or Callback Argument?
Jan 27, 2010I have a datalist which will display a list of groups from the database. In every group record, i have a button binding to it, and i give it a commandName call "joingroup" . When a user actaully clicks on the button(btnJoinGroup), the commandName fires. The problem i am facing now is, whenever i click on the button, i get this error below:
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
aspx code
<asp:DataList ID="DataList1" runat="server" RepeatColumns="1" OnItemCommand="DataList1_ItemCommand">
<ItemTemplate>
<br /> [code]....
Data Controls :: Invalid Postback Or Callback Argument Error
May 7, 2015Invalid postback or callback argument. Â Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. Â For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. Â If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField HeaderText="Name" DataField="name" />
<asp:BoundField HeaderText="Member_id" DataField="unique_id" />
<asp:BoundField HeaderText="Batch" DataField="batch" />
[code]...
Forms Data Controls :: Invalid Postback Or Callback Argument Error
Mar 28, 2011Typically I get this error when I am using AJAX, but I'm not using any AJAX at all in this page. Yet I'm getting this error.
Invalid postback or callback argument Here is my code.
[Code]....
[Code]....
Forms Data Controls :: Datagrid In User Control Generating A Callback Error?
May 24, 2010I have a Gridview that I am using in a User Control. The grid loads great and my paging buttons that exist outside of the grid itself work properly. When I click my delete button inside the grid, I am getting an invalid postback message. How should I handle this? My control raises one event by the way.
View 22 RepliesData Controls :: Invalid Postback Or Callback Argument / Error Is Generated On Clicking Checkbox
Apr 13, 2013I am getting the following error on on clikcing checkbox from checkbox list in my project.
Error:
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
If i set <pages enableEventValidation="false"/> then on clicking the submit button the information is not saved in database just page is refreshed.
aspx.cs file code:
protected void btnSubmit_Click(object sender, EventArgs e) {
if (con.State == ConnectionState.Closed) {
con.Open();
}
SqlCommand cmd = new SqlCommand(@"insert into MainTable values(@CollegeName,@AffilatedWith,@CollegeType,@Country,@City,@State,@EstablishmentYear,
[code].....
SQL Server :: DAL Doesn't Return The Return Value Of Stored Procedure?
Nov 8, 2010I have an update function in my data layer which is defined as:
public int UpdateRBTable(parameters ...) This calls a SQL Server Stored Procedure to perform an update function on the database.
The process does its job for updating the table. However, the stored procedure has a return value (which indicates how many rows were updated), but this return value is not returned to the application. The application always shows that a zero was returned from the stored procedure.
Can WebMethod Return An XmlDocument As Return Type
Jan 22, 2010Can my WebMethod return an XmlDocument as return type?
When I try to consume the web service I'm still not getting XML. It appears as though a reference to the method is being returned rather than say a string containing XML.
<WebMethod()> _
Public Function CustomerSearch(ByVal lastName As String, ByVal firstName As String, ByVal companyName As String, ByVal city As String, ByVal state As String, ByVal email As String) As XmlDocument
' Create XML doc
Dim doc As XmlDocument = New XmlDocument()
' some more code
Return doc
End Function
MVC :: How To Return 401 Error From A Method Return ActionResult
Sep 28, 2010how can i return 401 error from a method return ActionResult?
View 1 RepliesAssign A Value To the Methods Return Var before Return The Final Value?
Dec 2, 2010How can I assign a value to the methods return var BEFORE I return the final value?
Example:
public string Example()
{
[here I want to assign a value to the return var and continue this block until the end] = "TempStr"; [code].....
Data Controls :: Alert Return False On Confirm True And Return True On Confirm False On Value Exists
Mar 26, 2016I have an approve button.on clicking on this button it should show that an inactive value is present .Onclicking yes conformation it should save the data or else clicking on no conformation should return false; how i will do that?After alert it always submit the data.Â
protected void ibtApprove_Click(object sender, ImageClickEventArgs e)
{
string otherAffiliateName = txtRequestedAffiliate.Text;
int inActiveAffiliates = new BLRating().InActiveAAffiliateChecking(otherAffiliateName);
if (inActiveAffiliates > 0)
[code]...
This is the code i used.how i wiil stay back on Confirm 'no' click?
How To Get C# Return Dropdown List To Return Value As Int
Jun 8, 2010How to get asp.net return drop down list to return value as int
I want to pass the value to a stored procedure as an integer. But the default appears to be as a string which is not what the store procedure is expecting.
Is there a good way to return the list values as ints?
I suspect I can you set the value on the change selection event, is there another way?
Cannot Set Textbox Value In Callback Handler In C#
Mar 16, 2010I am using ASP.NET Callbacks (that implements the ICallbackEventHandler) and in the handler, I try to set a value of the text box:
txtName.text = "Test";
but this value is not set. Is this a limitation with callback? It appears I cannot do much in a callback handler other than sending back a string to the client side (ofcourse I can access the Session etc)
Send A Callback To Other Page?
Aug 18, 2010I have an asp.net page. I'm using a jquery library to open a modal window on link click. Within this modal window I'm loading another page. After i make update within this modal window I need to send a callback to "Parent" page. if I call function from this window I'm getting the error it couldn't find function. Window.opener.functionname also not working.
here is an example of my code
$(function () {
$('#ControlId').click(function (e) {
e.preventDefault();
$.ModalWindow({
bgColor: '#3333cc',
url: 'default.aspx'
});
return false;
});
return false;
});
});
Is there any way how to send a callback?
