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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: HTTP Verbs In MVC 5

clock June 18, 2019 12:12 by author Peter

In this article, I will explain the concept of HTTP verbs in MVC 5. I will also explain the various types of HTTP verbs in MVC 5 and how it works in the project.

What is HTTP?

  • HTTP stands for hypertext transfer protocol.
  • This protocol works while working with a client-server application.
  • This protocol provides communication between the client and the server.

HTTP provides methods (verbs) for the actions performed on a response. HTTP verbs are used on an action method. HTTP provides the following main verbs.

  • Get
  • Post
  • Put
  • Delete

HTTP Get
This verb is used to get existing data from the database. In HttpGet, data travels in the URL only. To use the HttpGet method, we use HttpGet attribute on the Action method. It is also the default HTTP verb.

Example
domain.com/student/GetStudent/1
domain.com/student/GetStudent?studentid=1


[HttpGet] 
public object GetStudent(int studentid) 

   // code here 


HTTP Post

This verb is used while we have to create a new resource in the database. In HttpPost, data travels in the URL and body. To use HttpPost method, we use HttpPost attribute on the Action method.

Example
domain/student/Studentsave


Body - Json body
[HttpPost] 
public object Studentsave(studentclass obj) 



HTTP Put

This verb is used while we have to update an existing resource in the database. In HttpPut, the data travels in the URL and body. To use HttpPut method, we use HttpPut attribute on the Action method.

Example
domain.com/student/studentupdate/1

Body- Json body
[HttpPut] 
public object Studentupdate(int studentid ,Studentclass objVM) 



HTTP Delete
This verb is used while we have to delete the existing resources in the database. In HttpDelete, data travels in the URL and body. To use HttpDelete, we use HttpDelete attribute on the Action method.

Example

domain.com/student/studentdelete/1

[HttpDelete]   
public object Studentupdate(int studentid)   
{   
}  
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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: How to Get Lookup Data in ASP.NET MVC 6?

clock April 12, 2019 12:28 by author Peter

In this article, I will explain about getting lookup dataa into you view ASP.Net MVC 6. This is a super common problem I encounter when building ASP.net MVC applications. I have a form that has a drop down box. Not only do I need to select the correct item from the edit model to pick from the drop down but I need to populate the drop down with the possible values.

Over the years I've used two approaches to doing this. The first is to push into the ViewBag a list of values in the controller action. That looks like
public ActionResult Edit(int id){ 
    var model = repository.get(id);

    ViewBag.Provinces = provincesService.List();

    return View(model);
}
Then in the view you can retrieve this data and use it to populate the drop down. If you're using the HTML helpers then this looks like

@Html.DropDownListFor(x=>x.province, (IEnumerable<SelectListItem>)ViewBag.Provinces)
This becomes somewhat messy when you have a lot of drop downs on a page. For instance consider something like

public ActionResult Edit(int id){ 
  var model = repository.get(id);

    ViewBag.Provinces = provincesService.List();
    ViewBag.States = statesService.List();
    ViewBag.StreetDirections = streetDirectionsService.List();
    ViewBag.Countries = countriesService.List();
    ViewBag.Counties = countiesService.List();

    return View(model);
}

The work of building up the data in the model becomes the primary focus of the view. We could extract it to a method but then we have to go hunting to find the different drop downs that are being populated. An approach I've taken in the past is to annotate the methods with an action filter to populate the ViewBag for me. This makes the action look like

[ProvincesFilter]
[StatesFilter]
[StreetDirectionsFilter]
[CountriesFilter]
[CountiesFilter]
public ActionResult Edit(int id){ 
  var model = repository.get(id);
  return View(model);
}

One of the filters might look like

public override void OnActionExecuting(ActionExecutingContext filterContext) 
{
    var countries = new List<SelectListItem>();
    if ((countries = (filterContext.HttpContext.Cache.Get(GetType().FullName) as List<SelectListItem>)) == null)
    {
        countries = countriesService.List();
        filterContext.HttpContext.Cache.Insert(GetType().FullName, countries);
    }
    filterContext.Controller.ViewBag.Countries = countries;
    base.OnActionExecuting(filterContext);
}

This filter also adds a degree of caching to the request so that we don't have to keep bugging the database.

Keeping a lot of data in the view bag presents a lot of opportunities for error. We don't have any sort of intellisense with the dynamic view object and I frequently use the wrong name in the controller and view, by mistake. Finally building the drop down box using the HTML helper requires some nasty looking casting. Any time I cast I feel uncomfortable.

@Html.DropDownListFor(x=>x.province, (IEnumerable<SelectListItem>)ViewBag.Provinces)
Now a lot of people prefer transferring the data as part of the model; this is the second approach. There is nothing special about this approach you just put some collections into the model.

I've always disliked this approach because it mixes the data needed for editing with the data for the drop downs which is really incidental. This data seems like a view level concern that really doesn't belong in the view model. This is a bit of a point of contention and I've challenged more than one person to a fight to the death over this very thing.

So neither option is particularly palatable. What we need is a third option and the new dependency injection capabilities of ASP.net MVC open up just such an option: we can inject the data services directly into the view. This means that we can consume the data right where we retrieve it without having to hammer it into some bloated DTO. We also don't have to worry about annotating our action or filling it with junk view specific code.

To start let's create a really simple service to return states.

public interface IStateService 
{
    IEnumerable<State> List();
}

public class StateService : IStateService 
{
    public IEnumerable<State> List() {
        return new List<State>
        {
            new State { Abbreviation = "AK", Name = "Alaska" },
            new State { Abbreviation = "AL", Name = "Alabama" }
        };
    }
}

Umm, looks like we're down to only two states, sorry Kentucky.

Now we can add this to our container. I took a singleton approach and just registered a single instance in the Startup.cs.

services.AddInstance(typeof(IStateService), new StateService()); 
This is easily added the the view by adding

@inject ViewInjection.Services.IStateService StateService

As the first line in the file. Then the final step is to actually make use of the service to populate a drop down box:

<div class="col-lg-12"> 
        @Html.DropDownList("States", StateService.List().Select(x => new SelectListItem { Text = x.Name, Value = x.Abbreviation }))
</div> 

That's it! Now we have a brand new way of getting the data we need to the view without having to clutter up our controller with anything that should be contained in the view.

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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: Easiest Way to Make CheckBox

clock March 29, 2019 11:53 by author Peter

In this article I show you, how easy it is to make a CheckBox on ASP.NET. The use of radio buttons and checkboxes using ASP.Net programming where the function of the radio button is choosing just one selection with a circle that is a point in the middle if we choose it. While the checkbox is square shaped that there is a tick if selected. To create a function of the radio button. We will explain below:

  • First you must create a project by choosing ASP.Net which is in the File> New Project> Other Languages> Visual C #> Web> Select Empty ASP.Net Web Application.
  • Fill in the name and click OK aspproject05
  • Right Click On aspproject05 in the top right corner select ADD> New Item> Web Form. And give CheckBox.aspx as a name.
  • Next create a CheckBox, button, label by entering this code is in the <div>

<asp:CheckBox ID="chkNews" Text="Do you want to get more update ?" runat="server" />
<br />
<asp:Button ID="btnSubmit" Text="Submit" runat="server" OnClick="btnSubmit_Click" /> <hr/>
<asp:Label ID="lblResult" runat="server" />


Code Description:

<Asp: CheckBox ID = "chkNews" Text = "Do you want to get more update ?" runat = "server" />
This script serves as the manufacture CheckBox with ID named chkNews, which says Do you want to get more update? sent or received by the server.

<br />
This script is used to create a new line

<Asp: Button ID = "btnSubmit" Text = "Submit" runat = "server" OnClick = "btnSubmit_Click" />
This script is used to manufacture the ID button button named btnSubmit, that says Submit sent to the server to have an action Click if the button is clicked.

<Asp: Label ID = "lblResult" runat = "server" />

This script serves to create a label with name ID lblResult the printed blanks to be sent to the server.


When you're done simply double-Click button and type in the code below:

lblResult.Text = chkNews.Checked.ToString ();


Code Description:

LblResult.Text = chkNews.Checked.ToString ();

The above code serves as outputan of chkBerita when checked or not displayed by a label that berID lblResult that are boolean. This means that when we press the button without us tick checkbox section will appear on labels False lblResult whereas if we check the CheckBox and pressing the button it will show True.

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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: ASP.NET MVC Request Life Cycle

clock March 12, 2019 09:39 by author Peter

If you have worked on ASP.NET MVC, you must be familiar with how when you type in an URL, the appropriate controller is chosen, and the action fired. Today we will dig a little deeper within the MVC request life cycle. Before we start discussing its life cycle, let's briefly understand the concept of HttpHandlers and HttpModules.

Handlers are responsible for generating the actual response in MVC. They implement the IHttpHandler class and only one handler will execute per request. On the other hand, HttpModules are created in response to life cycle events. Modules can, for example, be used for populating HttpContext objects. A request can use many modules. These classes derive from IHttpModule. We are now ready to learn about the MVC Request Life Cycle. The MVC life cycle can be briefly demonstrated as below,


When a request is fired for the first time, the Application_Start method in the Global.asax file is called. This method calls the RegisterRoutes method as below,
    public class MvcApplication : System.Web.HttpApplication 
        { 
            protected void Application_Start() 
            { 
                AreaRegistration.RegisterAllAreas(); 
                FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); 
                RouteConfig.RegisterRoutes(RouteTable.Routes); 
                BundleConfig.RegisterBundles(BundleTable.Bundles); 
            } 
        } 



RegisterRoutes method stores the routes defined in that method, in a static collection in the Routetable class.
Each route has an HttpHandler defined for it. In our case above, the MapRoute method defines the HttpHandler.
Next, the URLRoutingModule is called. It matches the request route with the routes defined in the route table. It calls the GetHttpHandler method which returns an instance of an MVCHandler.

The MVCHandler calls the ProcessRequest method. The controller execution and initialization happens inside this method. ProcessRequest calls ProcessRequestInit, which uses ControllerFactory to select an appropriate controller based on the supplied route. The ControllerFactory calls the Controller Activator which uses the dependency resolver to create an instance of the controller class.

Once the controller is created its Execute method is called.

Now comes the point where the action must be executed. The execute method in the controller calls the ExecuteCore method which calls the InvokeAction method of ActionInvoker. Action Invoker determines which action must be selected based on certain conditions, depending upon the methods available, their names and the action selectors used for them.

Once the action is selected, Authentication & Authorization filters are fired next.
Once the action passes through the authentication and authorization filter checks, the model binding takes place. The information needed for the action to execute is gathered in this step.

OnActionExecuting action filters are fired next. Once the OnActionExecuting filters are executed a response for the action is generated. The thing to note here is that the response is generated at this stage, but not executed.

Next, the OnActionExecuted filters are executed.  Once all the filters have finished executing, the response is finally executed in the ExecuteResult method which is called from the InvokeActionResult by the ActionInvoker. If the response is a view or a partial view, the ViewEngine will render it, else it will be handled appropriately. The ExecuteResult will find the appropriate view using FindView or FindPartialView method. This method will search for the view in specific locations and then render it. This is the final step in generating the response.

If you would like to further dig into the MVC request life cycle, I would highly recommend Alex Wolf’s pluralsight course by the same name.

HostForLIFE.eu ASP.NET MVC 6 Hosting
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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: Create A Password Protected PDF In MVC

clock February 19, 2019 10:37 by author Peter
Sometimes, we need to create a PDF file that opens only when the users put in a password when prompted. Let us see how to create a password-protected PDF file in MVC.

First, let's open Visual Studio and create a new project. We need to select the ASP.NET Web application type.

Select Web API as the template and in the "Add folders and core references" section, we need to select MVC and Web API. Click on "Change Authentication" on the right side pane and select "No Authentication".

 

In the web.config file, let us define one key named Filepath and use it in our code. The PDF file must be present there.

It is good to change the key's value when it's placed in web.config.
<appSettings> 
     <add key="FilePath" value="Anil\PDF\LDEPRD9.pdf"/> 
 </appSettings> 


Add the below code to the Home Controller.
string FilePath = ConfigurationManager.AppSettings["FilePath"].ToString(); 
public ActionResult DownloadFile() 

    try 
    { 
        byte[] bytes = System.IO.File.ReadAllBytes(FilePath); 
        using (MemoryStream inputData = new MemoryStream(bytes)) 
        { 
        using (MemoryStream outputData = new MemoryStream()) 
        { 
        string PDFFilepassword = "123456"; 
        PdfReader reader = new PdfReader(inputData); 
        PdfReader.unethicalreading = true; 
PdfEncryptor.Encrypt(reader, outputData, true, PDFFilepassword, PDFFilepassword, PdfWriter.ALLOW_SCREENREADERS);
        bytes = outputData.ToArray(); 
        Response.AddHeader("content-length", bytes.Length.ToString()); 
        Response.BinaryWrite(bytes); 
        return File(bytes, "application/pdf"); 
       } 
      } 
    } 
    catch (Exception ex) 
    { 
        throw ex; 
    } 


string PDFFilepassword = "123456";   
PdfReader reader = new PdfReader(inputData);   
PdfReader.unethicalreading = true;   
PdfEncryptor.Encrypt(reader, outputData, true, PDFFilepassword, PDFFilepassword, PdfWriter.ALLOW_SCREENREADERS); 


In the PDFFilepassword variable, you can set anything as password - the file name, PAN card number, or you can validate the entered value against the values stored in the database.

In Route.config, we can define the default route with the Controller And ActionName.

Run the website and enter http://localhost:49744/Home/DownloadFile. 

Here, Home is the controller name and DownloadFile is the action name. 

It shows the following Password prompt.

 

After entering the right password and successful authentication, the PDF file will get opened.

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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: Server Sent Events In ASP.NET MVC

clock February 15, 2019 08:14 by author Peter

In some Web Applications, we need to show real time data to the end users, which means if any changes occur (new data available) in the Server, it needs to show an end user. For instance, you are doing chat in Facebook in one tab of your Browser. You opened another tab in the same Browser and send a message to the same user (with whom, you are doing chat in the previous chat). You will see that message will appear in both the tabs and it is called real-time push.

In order to accomplish the functionality, mentioned above, the client sends interval basis AJAX requests to the Server to check, if the data is available or not. ServerSentEvents(SSE) API helps ensure the Server will push the data to the client when the data is available in the Server.

What are Server Sent Events?
SSE is an acronym and stands for Server Sent Events. It is available in HTML5 EventSource JavaScript API. It allows a Web page to get the updates from a Server when any changes occurs in the Server. It is mostly supported by the latest Browsers except Internet Explorer(IE).

Using code
We are going to implement a requirement like there is a link button and click on it and it displays current time each second on an interval basis.
In order to achieve the same, we need to add the following action in HomeController. It sets response content type as text/event-stream. Next, it loops over the date and flushes the data to the Browser.
    public void Message() 
    { 
        Response.ContentType = "text/event-stream"; 
     
        DateTime startDate = DateTime.Now; 
        while (startDate.AddMinutes(1) > DateTime.Now) 
        { 
            Response.Write(string.Format("data: {0}\n\n", DateTime.Now.ToString())); 
            Response.Flush(); 
     
            System.Threading.Thread.Sleep(1000); 
        } 
         
        Response.Close(); 
    }


Once we are done with the Server side implementation, it's time to add the code in the client side to receive the data from the Server and displays it.

First, it adds a href link, which calls initialize() method to implement SSE. Second, it declares a div, where the data will display. Thirdly, it implements Server Sent Events(SSE) through JavaScript with the steps, mentioned below.
    In the first step, it checks whether SSE is available in the Browser or not. If it is null, then it alerts to the end user to use other Browser.
    In the second step, if SSE is available, then it creates EventSource object with passing the URL as a parameter. Subsequently, it injects the events, mentioned below.

        onopen- It calls when the connection is opened to the Server
        onmessage- It calls when the Browser gets any message from the Server
        onclose- It calls when the Server closes the connection.

    <a href="javascript:initialize();" >Click Me To See Magic</a> 
    <div id="targetDiv"></div> 
     
    <script> 
         
        function initialize() { 
            alert("called"); 
     
            if (window.EventSource == undefined) { 
                // If not supported 
                document.getElementById('targetDiv').innerHTML = "Your browser doesn't support Server Sent Events."; 
                return; 
            } else { 
                var source = new EventSource('../Home/Message'); 
     
                source.onopen = function (event) { 
                    document.getElementById('targetDiv').innerHTML += 'Connection Opened.<br>'; 
                }; 
     
                source.onerror = function (event) { 
                    if (event.eventPhase == EventSource.CLOSED) { 
                        document.getElementById('targetDiv').innerHTML += 'Connection Closed.<br>'; 
                    } 
                }; 
     
                source.onmessage = function (event) { 
                    document.getElementById('targetDiv').innerHTML += event.data + '<br>'; 
                }; 
            } 
        } 
    </script>


Output

Here, we discussed about SSE(Server Sent Events). It is very important API available in HTML5. It helps to push data from the Server to the client when any changes occurs in the Server side. If you want to use a bidirectional communication channel, you can use HTML5 Web Sockets API. The disadvantage of SSE is it is Browser dependent. If the Browser doesn't support SSE, then the user can't see the data, but it is easy to use it. You can also use SignalR for realtime pushing the data to the end user.

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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: Creating Cascading DropDownList In ASP.NET MVC

clock January 23, 2019 10:46 by author Peter

I have used Entity Framework to fetch the values and used Database First approach. I would also write an article on an Entity Framework but today, I would just show you how to bind the cascading dropdown list in this blog.

I have two dropdownlists. One is for state and the other for city. I would populate the city, which is based on the state selection. You can add as many dropdownlists, as you want. For simplicity, I am using only two dropdowns.

Create table scripts
tblState
    CREATE TABLE [dbo].[tblState]( 
        [stateid] [int] NOT NULL, 
        [statename] [nvarchar](50) NULL, 
    PRIMARY KEY CLUSTERED  
    ( 
        [stateid] ASC 
    )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
    ) ON [PRIMARY] 
     
    GO  

tblCity

    CREATE TABLE [dbo].[tblCity]( 
        [Cityid] [int] NOT NULL, 
        [CityName] [nvarchar](50) NULL, 
        [stateid] [int] NOT NULL 
    ) ON [PRIMARY] 
     
    GO 
     
    ALTER TABLE [dbo].[tblCity]  WITH CHECK ADD FOREIGN KEY([stateid]) 
    REFERENCES [dbo].[tblState] ([stateid]) 
    GO 
 

I have tblState and tblCity, where I have stateid as Primary key in the tblState table and stateid as the Foreign key in tblCity table. You can insert states and cities from the database as you wish.

Now, with Entity Framework; create your EDMX file. In my case, I have named it ModelDemo.edmx.

Model
I have created a Model and named it Registration. This is not directly required but since I used a strongly typed View, so I have created Model. You can also add Model because if you write the httppost method to save the values to the database, then you would need the model.
    public class Registration 
    { 
    [Required(ErrorMessage = "Enter State")] 
            public string State { get; set; } 
    [Required(ErrorMessage = "Enter City")] 
            public string City { get; set; } 
    }  


Controller
Now, this is my Controller code.
    [HttpGet] 
    public ActionResult Details() 
            { 
                bindState(); 
                return View(); 
            } 
    -------------------------------- 
    public void bindState() 
            { 
                var state = objEF.tblStates.ToList(); 
                List<SelectListItem> li = new List<SelectListItem>(); 
                li.Add(new SelectListItem { Text = "--Select State--", Value = "0" }); 
     
                foreach (var m in state) 
                { 
     
     
                    li.Add(new SelectListItem { Text = m.statename, Value = m.stateid.ToString() }); 
                    ViewBag.state = li; 
     
                } 
            } 
    ---------------------------------- 
    public JsonResult getCity(int id) 
            { 
                var ddlCity = objEF.tblCities.Where(x => x.stateid == id).ToList(); 
                List<SelectListItem> licities = new List<SelectListItem>(); 
     
                licities.Add(new SelectListItem { Text = "--Select State--", Value = "0" }); 
                if (ddlCity != null) 
                { 
                    foreach (var x in ddlCity) 
                    { 
                        licities.Add(new SelectListItem { Text = x.CityName, Value = x.Cityid.ToString() }); 
                    } 
                } 
                return Json(new SelectList(licities, "Value", "Text", JsonRequestBehavior.AllowGet)); 
            }  


Now, if you see my Controller code, I have a httpget method Details(). I am then calling a non-action method bindState() to bind the state ddl. On selection of the state ddl, the getCity() method will be called to bind the city ddl. I have used jQuery to get the Id of the selected item and have passed it to the getCity method to get the cites for the selected state.

I have also used LINQ to get my desired select value w.r.t the Id passed.

View
Right click on action method Details(), followed by clicking Add View. I always prefer a strongly typed View and I have also created a strongly typed View in this case. The name of my View is Details.cshtml.

You need jQuery min.js. Just download it from the NuGet Package, if it’s not there.

    <script src="~/Scripts/jquery-1.10.2.min.js"></script> 
    <script type="text/javascript"> 
         
        $(document).ready(function () { 
     
            $("#State").change(function () { 
                $("#City").empty(); 
                $.ajax({ 
                    type: 'POST', 
                    url: '@Url.Action("getcity")', 
                    dataType: 'json', 
                    data: { id: $("#State").val() }, 
                    success: function (city) { 
     
                        $.each(city, function (i, city) { 
                            $("#City").append('<option value="' 
                                                       + city.Value + '">' 
                                                 + city.Text + '</option>'); 
                        }); 
                    }, 
                    error: function (ex) { 
                        alert('Failed.' + ex); 
                    } 
                }); 
                return false; 
            }) 
        }); 
    </script>  


I have added the jQuery-min.js. From the code given above, we get the Id of the state ddl.

    <div class="form-group"> 
    @Html.LabelFor(model => model.State, htmlAttributes: new { @class = "control-label col-md-2" }) 
                <div class="col-md-10"> 
                    @Html.DropDownListFor(model => model.State, ViewBag.state as List<SelectListItem>, new { style = "width: 200px;" }) 
     
                    @Html.ValidationMessageFor(model => model.State, "", new { @class = "text-danger" }) 
                </div> 
            </div> 
     
            <div class="form-group"> 
     @Html.LabelFor(model => model.City, htmlAttributes: new { @class =     "control-label col-md-2" }) 
                <div class="col-md-10"> 
          @Html.DropDownListFor(model => model.City, new SelectList(string.Empty, "Value", "Text"), "--Select City--", new { style = "width:200px" }) 
     
                    @Html.ValidationMessageFor(model => model.City, "", new { @class = "text-danger" }) 
                </div>   


I have used jQuery to get the ID of the state DDL on .change function and passed it to bind the city ddl.

Now, just run your Application and you should get the output given below and if you do not get it, then check that if you are getting any values in an Id in getCity() method. If not, then check for Id mis-match.

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ASP.NET MVC 6 Hosting - HostForLIFE.eu :: How to Call Ajax Method Call with ASP.NET MVC?

clock January 8, 2019 11:41 by author Peter

In this tutorial, let me show you how to call ajax method in ASP.NET MVC.
Controller code here
    [HttpGet] 
    public JsonResult GetAjaxData(string newCode) { 
        return Json(new { 
            Status = "Ajax called succesfully", Message = "Message show succesfully" 
        }, JsonRequestBehavior.AllowGet); 
    } 

View Code Here

    @ { 
        ViewBag.Title = "Index"; 
    } < script src = "~/Scripts/jquery-1.8.2.js" > < /script> 
    <script> 
    function AjaxCall() 
    { 
    $.ajax({ 
    async: false, 
    url: $('#ajaxURL').val(), 
    type: 'GET', 
    cache: false, 
    data: { 
    newCode : "Put the data here" 
    }, 
    success: function (result) { 
    if(result.Status !=''){ 
    alert(result.Status); 
    } 
    else{ 
    alert('Ajax called failed'); 
    } 
    }, 
    error: function (result, textStatus, errorThrown) { 
    alert(errorThrown); 
    } 
    }) 
    } 
    </script > < div > < button value = "Ajax Called" 
    id = "btncalled" 
    onclick = "AjaxCall()" > Ajax Called < /button> 
    </div > @Html.Hidden("ajaxURL", Url.Action("GetAjaxData", "Demo")) 

App_Start-> route config.cs code here

    public static void RegisterRoutes(RouteCollection routes) { 
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); 
        routes.MapRoute( 
        name: "Default", 
        url: "{controller}/{action}/{id}", 
        defaults: new { 
            controller = "Demo", action = "Index", id = UrlParameter.Optional 
        }); 
    } 


I hope it works for you! Good luck!

HostForLIFE.eu ASP.NET MVC 6 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.



ASP.NET MVC 6 Hosting - HostForLIFE.eu :: How to Fix Bundles Are Not Working After Hosting To MVC Application?

clock December 18, 2018 10:38 by author Peter

If your bundles are not getting configured properly in your server, I have fixed this issue, and here I am going to share with you how you can also fix this error. I hope you will like this.

Background

Recently, I hosted one of my MVC applications to Microsoft Azure cloud. And we usually publish our application in release mode, right? So here comes the problem. You can replicate the same issue in your local machine itself. Just make the debug attribute to false in your Web.config as follows.

  1. <compilation debug="false" targetFramework="4.5" />  

And when you run, you will get a prompt as follows.

Run without debugging

Just select Run without debugging option. Now once after your application is run, you can see some script errors in your browser console saying that the references are not loaded correctly.

Release more error in console

And finally I found the solution. Here we will see that.

"Bundles Are Not Working After Hosting To MVC Application"

As I said, the problem is with your bundle config settings. There are few things you must check before going to the last fix.

  • Please make sure that you have used StyleBundle for creating the style bundle.
  • Please make sure that you have used ScriptBundle for creating the style bundle.
  • Make sure that you are loading the styles using @Styles.Render.
  • Make sure that you are loading the scripts using @Scripts.Render.
  • Make sure that the folder structure is same as you have in local system.
    If none of the above solution works, you can try the last one.
  • Make sure that virtual path of bundles doesn’t contains the folder names you have in your solution.

I will explain it. In my case my bundles were as follows.

@Styles.Render("~/Scripts/JQWidgets/CSS")  
@Scripts.Render("~/Scripts/JQWidgets")  

And I have the folders JQWidgets in my root script folder. This was making the issue.


Folder structure

Now what I did is, I just changed my bundle config settings in BundleConfig.cs as follows(Renaming the folder),

bundles.Add(new ScriptBundle("~/Scripts/Grid")  
bundles.Add(new StyleBundle("~/Scripts/Grid/Styles")  

And I referenced the same bundles as follows in my views.

@Styles.Render("~/Scripts/Grid/Styles")  
@Scripts.Render("~/Scripts/Grid")  

Please try these steps and build your application. Once that is done you can publish your application to cloud. I hope this will solve your issue. Have a happy coding.

Conclusion

Did I miss anything that you may think is needed? Did you find this post useful? I hope you liked this article. Please share with me your valuable suggestions and feedback.

Your turn. What do you think?

A blog isn’t a blog without comments, but do try to stay on topic. If you have a question unrelated to this post, you’re better off posting it on C# Corner, Code Project, Stack Overflow, ASP.NET Forum instead of commenting here. Tweet or email me a link to your question there and I’ll definitely try to help if I can.

HostForLIFE.eu ASP.NET MVC 6 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.



ASP.NET MVC 6 Hosting - HostForLIFE.eu :: Stepwise Display Multiple Partial View Using JSON in MVC 5

clock November 9, 2018 10:58 by author Peter

Here are the steps:
Step 1: Create the basic structure of your project, View, multiple partial views View Model,

Step 2: Create your base Controller as in the following,
    public class BaseController: Controller 
    { 
        protected internal virtual CustomJsonResult CustomJson(object json = null, bool allowGet = true) 
        { 
            return new CustomJsonResult(json) 
            { 
                JsonRequestBehavior = allowGet ? JsonRequestBehavior.AllowGet : JsonRequestBehavior.DenyGet 
            }; 
        } 
    } 


It is just small modifications if JSON is not provided handle it. And use this Controller as base controller.

Step 3: Add Class Controller helper which helps you to convert partial view into the string format as in the following,
    public static class ControllerHelper 
    { 
        public static string RenderPartialViewToString(ControllerContext context, string viewName, object model) 
        { 
            var controller = context.Controller; 
            var partialView = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName); 
            var stringBuilder = new StringBuilder(); 
            using(var stringWriter = new StringWriter(stringBuilder)) 
            { 
                using(var htmlWriter = new HtmlTextWriter(stringWriter)) 
                { 
                    controller.ViewData.Model = model; 
                    partialView.View.Render(new ViewContext(controller.ControllerContext, partialView.View, controller.ViewData, new TempDataDictionary(), htmlWriter), htmlWriter); 
                } 
            } 
            return stringBuilder.ToString(); 
        } 
    } 

Step 4: Your action code is below. I have added the 2 partial views. Basically we are converting the partial view with objects into the string format.
    public JsonResult CreatePartialView() 
    { 
        MyMultipleUpdateViewModel obj = new MyMultipleUpdateViewModel(); 
        obj.myTest1ViewModel = new MyTest1ViewModel(); 
        obj.myTest1ViewModel.MyTestUpdate = "Test1" + DateTime.Now.ToString(); 
        obj.myTest2ViewModel = new MyTest2ViewModel(); 
        obj.myTest2ViewModel.MyTestUpdate = "Test2" + DateTime.Now.ToString(); 
        var json = new 
        { 
            Header = "Header", Footer = "Footer" 
        }; 
        return CustomJson(json).AddPartialView("_MyTest1PartialView", obj).AddPartialView("_MyTest2PartialView", obj); 
    } 

Step 5: In View display this JSON data ajax in below way . In below code PartialViewDiv1 and PartialViewDiv2 are two divs in which two partial views will be displayed. I have two partial views you may load more partial views.
    <h2>Index</h2> 
    <script type="text/javascript" src="@Url.Content(" ~/Scripts/jquery-1.10.2.js ")"></script> 
    <script type="text/javascript" src="@Url.Content(" ~/Scripts/jquery.unobtrusive-ajax.min.js ")"></script> 
    <script> 
    function GetData(url, onSuccess) 
    { 
        $.ajax( 
        { 
            type: "GET", 
            cache: false, 
            url: url, 
            dataType: "json", 
            success: function(data, textStatus, jqxhr) 
            { 
                onSuccess(data.Json, data.Html); 
            }, 
            error: function(data, text, error) 
            { 
                alert("Error: " + error); 
            } 
        }); 
        return false; 
    } 
     
    function UpdateDiv(json, html) 
    { 
        $("#PartialViewDiv1").html(html[0]); 
        $("#PartialViewDiv2").html(html[1]); 
    } 
    </script> 
    <input type="button" onclick="GetData('/DisplayMutiplePartialView/CreatePartialView', UpdateDiv);" value="Display Multiple Partial View" /> 
    <br> 
       <br> 
          <div id="PartialViewDiv1"></div> 
       <br> 
       <br> 
          <div id="PartialViewDiv2"></div> 
       <br> 
    <br> 


Step 6: Run application and use URL,
It will appear as below

HostForLIFE.eu ASP.NET MVC 6 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

 



About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2016 Hosting, ASP.NET Core 2.2.1 Hosting, ASP.NET MVC 6 Hosting and SQL 2017 Hosting.


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