AjaxControlToolkit ModalPopup in Asp.net MVC

I have a DashBoard view. On clicking on Assign button a ModalPopup Opens like :

Code for opening PopUp

$create(AjaxControlToolkit.ModalPopupBehavior, 
    { 
        "BackgroundCssClass": "modalBackground", 
        "DropShadow": false, 
        "OkControlID": 
        "OkButton", 
        "OnOkScript": "onOk()", 
        "PopupControlID": "div_to_popup", 
        "id": "PopUpBox" 
    }, null, null, $get("day"+a));

function onOk(){
  // what to write here to save data on server
}

You could probably do this with a jQuery plugin of your choice.

I would advise against using the Ajax Control Toolkit with ASP.NET MVC at all, since it is both old and kind of hacky to begin with, and (more importantly) heavily targeted against WebForms development.

This worked for me

$.ajax ({ type: "POST", url: "/Home/SaveEntry", data: { "savedata": data }, success: successFunction, error: errorFunction }); `

function successFunction() { 
    alert('Inserted in Table successfully');
}

function errorFunction(){
    alert('Some error occurred');
}

` My Controller

public void SaveEntry(string savedata) { string[] temp = result.Split('|'); GS_ALLOCATION shift = new GS_ALLOCATION(); shift.EMP_CODE = decimal.Parse(temp[0]); shift.ALLOC_DATE = DateTime.Parse(temp[2]); shift.TEAM_CODE = temp[3]; shift.WWL_WEEK = temp[4]; shiftRepo.AddShift(shift); }