如何使用json.stringify将对象列表从视图传递到MVC控制器

Question

I have tried with following code but shows null in the controller side..

view:

<script>
function getme(){
debugger;
var emp = [
{ empid: 1, name: 'sasi' },
{ empid: 2, name: 'sathish'}
];
emp = JSON.stringify({ 'emp': emp });
$.ajax({
contentType: 'application/json; charset=utf-8',
dataType: 'json',
type: 'POST',
url: '/Home/getemplist',
data: JSON.stringify(emp)
});
}


</script>
<input type="button" onclick="getme();" value="Click me" />

controller:

public void getemplist(List<Emp> emp) 
{ }

Emp.cs:

public class Emp
{
public int empid { get; set; }
public string name{get;set;}
} 

Answer 1

After a lot of searches in google.. I found the way to post the list of objects to controller.. i have modified little bit in my code... here it is!!

script :

var emp = [{ 'empid': 1, 'name': 'sasi' },{ 'empid': 2, 'name': 'sathish'}];
    emp = JSON.stringify(emp)
    $.post("/Home/getemplist/", { 'emp': emp }) 

Controller:

Here i just changed the parameter to string type. using JavaScriptSerializer you can able to convert this string data to your class list objects.. you can understand it better if u see my code below:

  public void getemplist(string emp) 
    {
        List<Emp> personData;
        JavaScriptSerializer jss = new JavaScriptSerializer();
        personData = jss.Deserialize<List<Emp>>(emp);
        // DO YOUR OPERATION ON LIST OBJECT

    }

Include this (System.Web.Script.Serialization) namespace in your controller inorder to use the JavaScriptSerializer class.

Hope this helps !! Happy coding :)

Answer 2

There is problem with data that you are sending to server. you don't need to JSON.stringify 2 times.

 function getme() {
    debugger;
    var emp = [
    { empid: 1, name: 'sasi' },
    { empid: 2, name: 'sathish' }
    ];
    emp = JSON.stringify({ emp: emp });//make json string once 
    $.ajax({
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        type: 'POST',
        url: '/Home/getemplist',
        data: emp //send it to server
    });
 }