Is It Possible To Detect Form Reload By Ajax In Mvc 4? Sorry But I Have No Idea About It.

See more:

Ajax

jQuery

MVC4

I want to detect the page reload by ajax and if the page have been reloaded only then i want to fill my DistrictId variabl. This reload is happening when a user select value from dropdownlist.

Please note that i am writing this code in View and this is for a dropdownlist named Districtddl
Also

@if (Request.HttpMethod=="POST") {}

is not working

<select class="ddl" id="Districtddl" name="Districtddl">
                            <option>----Select District----</option>
                            @foreach (System.Data.DataRow dr in FarmerRegisterFormAndPrint.Models.StoredProcedures.GetAllDistrict().Rows)
                            {
                                <option id="@dr["DistrictId"].ToString()">@dr["DistrictName"].ToString()</option>
                            }
                        </select>

Quote:

This reload is happening when a user select value from dropdownlist.

@{var DistrictId = "";}
            @if (Request.HttpMethod=="POST") {
                var DistrictId = Request.Form["Districtddl"].ToString();
            }

Quote:

This variable then will be used to pass as parameter to another dropdownlist.
How i can do this.

<select class="ddl" id="Tehsilddl">
<option id="0">----Select District----</option>
@if (!string.IsNullOrEmpty(DistrictId))
{
foreach (System.Data.DataRow dr in FarmerRegisterFormAndPrint.Models.StoredProcedures.GettehsilAccToDistrict(DistrictId).Rows)
    {
        <option id="@dr["TehsilId"].ToString()">@dr["TehsilName"].ToString()</option>
    }
}
</select>

$("#Districtddl").on('change', function () {
      var valueDistrictDDl = $(this).find('option:selected').attr('id');
      alert(valueDistrictDDl);
      var urlInUse = window.location.href;
      $.ajax({
          url: urlInUse,
          dataType: "html",
          success: function (data) {
              alert("reloaded")

          }
      });

And if any of this doesnot make any sense to you then please tell me how to set jquery variable to here

(System.Data.DataRow dr in FarmerRegisterFormAndPrint.Models.StoredProcedures.GettehsilAccToDistrict(DistrictId).Rows)

it is a lot easy to get the selected id in jquery but do not know how to pass that to DistrictId