使用ajax获取值

Question

I have a list defined in my controller. Now i want to get user input ,check if it exists in list in controller and then get all it related value.

Controller

private List<M> Ma()
   {
     List<M> md = new List<M>()
      { 
      new M{ R="a", A=300, T= 1, P=40, N=1200},
      new M{ R="Bl", A=100, T= 150, P=400, N=1200},
       };
      return mapData;
   }

Answer 1

Your controller should look like this:

public ActionResult DashData(double a)
{
    return Json(md.FirstOrDefault(map=>map.a == a));
}

While md is the List you defined first

then ur AJAX call should be like this:

    $.ajax({
            url: "../Home/DashData",
            type: "POST",
            data: {'a':a},
            success: function (data) {
                qv.val(data.a);
            }
        });