Dealing with 405 Error (Method Not Allowed) in AngularJS Integrating with a WCF

Question

Dealing with 405 Error (Method Not Allowed) in AngularJS Integrating with a WCF

I am currently working on a WCF project where I am trying to integrate my WCF project with an Angular JS application. However, when I run the application, no errors are displayed. On inspecting the developer tools in Google Chrome, I noticed some errors related to inserting, updating, and deleting data. The errors I encountered are as follows... Can anyone assist me in rectifying these errors? Your help would be greatly appreciated.

?o=3&g=EC0825C4-90A4-2692-D257-CD2C2B565912&s=1A2C77E8-0498-4A11-B8B8-D740DBEC71C4&z=1403834305:2 Uncaught SyntaxError: Unexpected token <
2angular.js:12701 OPTIONS http://localhost:50028/StudentService.svc/AddNewStudent 405 (Method Not Allowed)

Index:1 XMLHttpRequest cannot load http://localhost:50028/StudentService.svc/AddNewStudent. Response for preflight has invalid HTTP status code 405
Modules.js:52 Some error Occured[object Object]
Index:1 GET http://localhost:50028/StudentService.svc/GetAllStudent/ 400 (Bad Request)
angular.js:14642 ReferenceError: $log is not defined
    at Modules.js:18
    at angular.js:17000
    at m.$digest (angular.js:18182)
    at m.$apply (angular.js:18480)
    at l (angular.js:12501)
    at XMLHttpRequest.s.onload (angular.js:12655) "Possibly unhandled rejection: {}"

Here is the Angular JS code...

/// <reference path="../angular.min.js" />  
var app;

(function () {
    app = angular.module("RESTClientModule", []);

    // Controller code

})();

This is the WCF service code...

// WCF Service contract code 

// Implementation of methods in the WCF service

And here is the HTML code...

<!DOCTYPE html>
<html data-ng-app="RESTClientModule">
<head title="ASAS">
    <title></title>
    <script src="~/Scripts/angular.min.js"></script>
    <script src="~/Scripts/MyScripts/Modules.js"></script>
</head>
<body>
    <table id="tblContainer" data-ng-controller="CRUD_AngularJs_RESTController">

        <!-- Table structure for displaying records -->

    </table>
</body>
</html>

A screenshot of the application running can be viewed here.

javascript c#angularjs linq wcf

Answer 1

Answer №1

To start off, make sure to utilize the * in the [ServiceContract]. Here's an example:

[WebInvoke(Method = "*"

By doing this, your method will be able to handle OPTIONS requests.

Next, include the following code snippet in your web.config:

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*"/>
    <add name="Access-Control-Allow-Headers" value="X-Requested-With,Content-Type, Accept" />
  </customHeaders>
</httpProtocol>

Remember to address the OPTIONS requests. You can handle it like so:

public List<StudentDataContract> GetAllStudent()
        {
          if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
            return null;            
          var query = (from a in ctx.Students
                         select a).Distinct();

            List<StudentDataContract> studentList = new List<StudentDataContract>();

            query.ToList().ForEach(rec =>
            {
                studentList.Add(new StudentDataContract
                {
                    StudentID = Convert.ToString(rec.StudentID),
                    Name = rec.Name,
                    Email = rec.Email,
                    EnrollYear = rec.EnrollYear,
                    Class = rec.Class,
                    City = rec.City,
                    Country = rec.Country
                });
            });
            return studentList;
        }

Follow these steps and you should be good to go. Best of luck!

Answer 2

To start off, make sure to utilize the * in the [ServiceContract]. Here's an example:

[WebInvoke(Method = "*"

By doing this, your method will be able to handle OPTIONS requests.

Next, include the following code snippet in your web.config:

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*"/>
    <add name="Access-Control-Allow-Headers" value="X-Requested-With,Content-Type, Accept" />
  </customHeaders>
</httpProtocol>

Remember to address the OPTIONS requests. You can handle it like so:

public List<StudentDataContract> GetAllStudent()
        {
          if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
            return null;            
          var query = (from a in ctx.Students
                         select a).Distinct();

            List<StudentDataContract> studentList = new List<StudentDataContract>();

            query.ToList().ForEach(rec =>
            {
                studentList.Add(new StudentDataContract
                {
                    StudentID = Convert.ToString(rec.StudentID),
                    Name = rec.Name,
                    Email = rec.Email,
                    EnrollYear = rec.EnrollYear,
                    Class = rec.Class,
                    City = rec.City,
                    Country = rec.Country
                });
            });
            return studentList;
        }

Follow these steps and you should be good to go. Best of luck!

Dealing with 405 Error (Method Not Allowed) in AngularJS Integrating with a WCF

Answer №1

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