How do i call controller action method in view which returns a int value?

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I collecting a value from database. and i want to send that value to view.and their i want to check that value.

What I have tried:

In Action method in controller
public ActionResult BookSet(long? ClassId)
{
List<bkselect> Bk = new List<bkselect>();

Bk= (from a in db.Student_Book_Allow_Quantity
where a.Class_Id==ClassId
select new BKselect()
{
Class_Id=a.Class_Id,
Student_Book_Allow_Quantity_Id=a.Student_Book_Allow_Quantity_Id
}).OrderBy(a => a.Class_Id).ToList();
ViewBag.BKselect = Bk.ToList();
return PartialView();
}
in view part
$("#FieldListTable").append('

BOOkS LISt
@Html.ListBox("LstSignInAuthority", Enumerable.Empty<SelectListItem>(), new { @id = "LstSignInAuthority", style = "width:200px;height:130px;" })

');
fuction part
function Addbook() {
var bkLst = $("#LstSignInAuthority");
if (bkLst !== "") {
$(document).ready(function () {

var newValue = $('input[name=Book_Name]').val();
var TotalItems = document.getElementById("LstSignInAuthority").options.length;

if (TotalItems < 5) {
$('#LstSignInAuthority').append('<option value="' + newValue + '">' + newValue + '</option>');
$("#Book_Name").val("");
$("#Title").val("");
$("#Book_Category_Name").val("");

}

});

}

}

Posted 10-Mar-16 19:55pm

Hussain Javed

Updated 11-Mar-16 1:00am

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Comments

[no name] 11-Mar-16 4:52am

DO you want to return int value or list value to view from your controller. Because in your code you are returning List but in question header it says int. Please confirm..

Hussain Javed 11-Mar-16 5:10am

i want to return value of total books allocated to particular class.that value i want to return to view.and i want to compare that value with total items in listbox control count value.in Add function.

2 solutions

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Zubair SE · Answer 1 · 2016-03-10T20:30:00

Solution 1

The best option is to make an ajax call to that action method,

Posted 10-Mar-16 20:30pm

Zubair SE

Comments

Hussain Javed 11-Mar-16 4:05am

i dont know to make ajax call to action method,can you please help me
how to call controller action method and pick up that int value and use that value in add function of view

Manas_Kumar · Answer 2 · 2016-03-11T01:00:00

In following code, it sends an AJAX request to server and it fetches all books. Next it checks total book list length with dropdown list length. Find below steps to get your requirement:

JavaScript:

JavaScript

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script> 
    var jsonObj = { ClassId : 234 };
    alert(JSON.stringify(jsonObj));
 
    $.ajax({
        type: "POST",
        url: "/Home/BookSet", // Home is contoller, Bookset is action
        data: JSON.stringify(jsonObj),
        contentType: "application/json",
        datatype: "json",
        success: function (bookList) {
            if(bookList.length == $("#LstSignInAuthority option").length)
			{
				// Implement your logic
			}else
			{
				// Implement your logic
			}
        }
    });
</script>

Controller action:

C#

[HttpPost]
public ActionResult BookSet(long? ClassId)
{
	List<bkselect> Bk = new List<bkselect>();

	Bk= (from a in db.Student_Book_Allow_Quantity
		where a.Class_Id==ClassId
		select new BKselect()
		{
			Class_Id=a.Class_Id,
			Student_Book_Allow_Quantity_Id=a.Student_Book_Allow_Quantity_Id
		}).OrderBy(a => a.Class_Id).ToList();
 
	return Json(Bk);
}