Changing The Image On Previous And Next Button Using Ajax In MVC 5

Here are the steps, 

Step 1: Verify you have Microsoft jQuery Unobtrusive Ajax in your script folder.



If not then install package using the following command in nuget.

Install-PackageMicrosoft.jQuery.Unobtrusive.Ajax

You may refer the following link to install.

Step 2: Create Controller, Model and View in your MVC application.

Step 3: Include the following two important script file in your project.



Step 4: Create the viewmodel, add method GetList and you may take this from DB. I have given hardcoded vales.

public class ImageModel
{
    public ImageViewModel SelectedImage;
    public ImageModel()
  {

    }

    public List < ImageViewModel > GetList()
    {
        List < ImageViewModel > list = new List < ImageViewModel > ();
        list.Add(new ImageViewModel
        {
            Id = 1, Path = "~/Content/Images/IMG_7785.jpg"
        });
        list.Add(new ImageViewModel
        {
            Id = 2, Path = "~/Content/Images/IMG_7788.jpg"
        });
        list.Add(new ImageViewModel
        {
            Id = 3, Path = "~/Content/Images/IMG_7790.jpg"
        });
        list.Add(new ImageViewModel
        {
            Id = 4, Path = "~/Content/Images/IMG_7799.jpg"
        });
        list.Add(new ImageViewModel
        {
            Id = 5, Path = "~/Content/Images/IMG_7847.jpg"
        });
        list.Add(new ImageViewModel
        {
            Id = 6, Path = "~/Content/Images/IMG_7849.jpg"
        });
        return list;
    }

}

Step 5: Call the Partial view in main view inside the Div,



Step 6: Add Ajax.BeginForm

It has the following parameters,

1. Action Name
2. Controller Name
3. AjaxOption (mention HttpMethod =post , UpdateTargetId = “Traget Div to update”
   
   Also add Two button Prev and next My Ajax.BegineForm is as below.

For the btnPrev and btnNext two different values are given and common Name is given as ButtonType. Both the conditions are manipulated in the controller.



And My Final View is as below,

@model DropdownGrid.Models.ImageModel

@ {
    ViewBag.Title = "Albam";
}

< 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>


< br >
    < br >
    < br >
    < br >

    < fieldset >
    < div id = "dvCategoryResults" >
    @ {
        Html.RenderPartial("_PartialImage", Model);
    } < /div> < /fieldset>

< fieldset >
    @using(Ajax.BeginForm("GetNextOrPrevImage", "Image", new
    {
            SelectedId = Model.SelectedImage
        },
        new AjaxOptions
            {
            HttpMethod = "Post", UpdateTargetId = "dvCategoryResults"
        })) {

        < input type = "submit"
        value = "<"
        id = "btnPrev"
        name = "ButtonType" / >
            < input type = "submit"
        value = ">"
        id = "btnNext"
        name = "ButtonType" / >
    }
< /fieldset>

Controller Code

public class ImageController: Controller
{
    public ActionResult Index() {
        ImageModel _objuserloginmodel = new ImageModel();
        ViewBag.SelectedId = 0;
        TempData["SelectedId"] = 0;

        _objuserloginmodel.SelectedImage = _objuserloginmodel.GetList()[0];
        return View(_objuserloginmodel);
    }

    [HttpPost]
    public ActionResult GetNextOrPrevImage(ImageViewModel SelectedImage, string ButtonType)
    {
        ImageModel _objuserloginmodel = new ImageModel();
        List < ImageViewModel > GetList = _objuserloginmodel.GetList();

        int id = System.Convert.ToInt32(TempData["SelectedId"]);

        if (ButtonType.Trim() == ">")
            _objuserloginmodel.SelectedImage = GetList[++id < GetList.Count ? id : --id];
        else if (ButtonType.Trim() == "<")
            _objuserloginmodel.SelectedImage = GetList[--id > -1 ? id : ++id];

        TempData["SelectedId"] = id;
        return PartialView("_PartialImage", _objuserloginmodel);
    }
}

Hence you will get your div with partial view updates on submit button using Ajax.BeginForm.

On Submit button you can see the partial view updates without postback whole form.