[Solved] Inserting data into database not working using Web API in AngularJS

Model.cs :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApi.Models
{
    public class InvoiceDetails
    {
        public InvoiceDetails() { }
        public string InvoiceNo { get; set; }
        public int InvoiceId { get; set; }
        public string PartNo { get; set; }
        public string PartName { get; set; }
        public int NoOfPallets { get; set; }
        public int PalletCapacity { get; set; }
        public int Numbers { get; set; }        
    }
}

Controller.cs :

[HttpPost]
[ActionName("AddInvoiceDetails")]
public void insertInvoiceDetails(InvoiceUnchecked invdtls)
{
    SqlConnection myConnection = new SqlConnection();
    myConnection.ConnectionString = ConfigurationManager.ConnectionStrings["ERPConnectionString"].ConnectionString;
    SqlCommand sqlCmd = new SqlCommand();
    sqlCmd.CommandType = CommandType.StoredProcedure;
    sqlCmd.CommandText = "INSERT_WAREHOUSE";
    sqlCmd.Connection = myConnection;
    sqlCmd.Parameters.AddWithValue("@InvoiceId", invdtls.InvoiceId);           
    myConnection.Open();
    int rowInserted = sqlCmd.ExecuteNonQuery();            
    myConnection.Close();          
}

I want to insert the data based on invoice id, here the data is nothing but the partno, partname, noofpallets, palletcapacity, numbers.

$scope.btntext = "Submit";      
$scope.submit = function () { 
    var post = $http({
        method: "POST",
        url: "http://stagingserver:85/EBSApi/api/Warehouse/AddInvoiceDetails",
        data: $scope.mydata,
        dataType: 'json',
        headers: { "Content-Type": "application/json" }
    });
    post.success(function (data,status) {
        $scope.mydata.push(data);              
        alert('Data Submitted...!');
    });
    //$scope.mydata = "";
    post.error(function (data,status) {
        console.log($scope.Selectedinvoice.originalObject.InvoiceId);
        alert('Failed');
    });         
}