Documentation(1023120): Updated sample and ReadME file

Author: Ranjani4311

Cascading-dropdown-remote-data/filter_core/.vs/config/applicationhost.config

@@ -6,6 +6,7 @@
 using Microsoft.AspNetCore.Mvc;
 using filter_core.Models;
 using Syncfusion.EJ2.Base;
+ using System.Text.Json;
 
 namespace TestSample.Controllers
 {
@@ -24,24 +25,49 @@ public IActionResult Index()
         }
 
 
-        public IActionResult StateDataSource([FromBody]ExtendedDataManager dm)
-        {
+        // public IActionResult StateDataSource([FromBody]ExtendedDataManager dm)
+        // {
 
-            var state = States.getStates();
+        //     var state = States.getStates();
 
-            var Data = state.ToList();
-            int count = state.Count();
+        //     var Data = state.ToList();
+        //     int count = state.Count();
 
 
-            List<States> iterateState= new List<States>();
-            foreach (States st in state) {
-                if (st.countryId == (Int64)dm.Where[0].value) {
-                    iterateState.Add(st);
-                }
-            }            
-            return dm.RequiresCounts ? Json(new { result = Data.Skip(dm.Skip).Take(dm.Take), count = count }) : Json(iterateState.ToList());
+        //     List<States> iterateState= new List<States>();
+        //     foreach (States st in state) {
+        //         if (st.countryId == (Int64)dm.Where[0].value) {
+        //             iterateState.Add(st);
+        //         }
+        //     }            
+        //     return dm.RequiresCounts ? Json(new { result = Data.Skip(dm.Skip).Take(dm.Take), count = count }) : Json(iterateState.ToList());
+        // }
+
+
+   
+
+public IActionResult StateDataSource([FromBody] ExtendedDataManager dm)
+{
+    var states = States.getStates();
+
+    int countryId = 0;
+
+    if (dm.Where != null && dm.Where.Count > 0)
+    {
+        var jsonValue = (JsonElement)dm.Where[0].value;
+
+        if (jsonValue.ValueKind == JsonValueKind.Number)
+        {
+            countryId = jsonValue.GetInt32(); // or GetInt64()
         }
+    }
+
+    var filteredStates = states
+        .Where(st => st.countryId == countryId)
+        .ToList();
 
+    return Json(filteredStates);
+}
         public IActionResult CountryDataSource([FromBody]ExtendedDataManager dm)
         {