может работает, а может и нет, а может не может

IceCreamShop/IceCreamShopClientApp/APIClient.cs

@@ -11,6 +11,8 @@ namespace IceCreamShopClientApp
 
         public static ClientViewModel? Client { get; set; } = null;
 
+		public static int CurrentPage { get; set; } = 0;
+
 		public static void Connect(IConfiguration configuration)
         {
             _client.BaseAddress = new Uri(configuration["IPAddress"]);

IceCreamShop/IceCreamShopClientApp/Controllers/HomeController.cs

@@ -3,6 +3,7 @@ using IceCreamShopContracts.ViewModels;
 using IceCreamShopClientApp.Models;
 using Microsoft.AspNetCore.Mvc;
 using System.Diagnostics;
+using System.Text;
 
 namespace IceCreamShopClientApp.Controllers
 {
@@ -153,5 +154,42 @@ namespace IceCreamShopClientApp.Controllers
 			}
 			return View(APIClient.GetRequest<List<MessageInfoViewModel>>($"api/client/getmessages?clientId={APIClient.Client.Id}"));
 		}
+
+		[HttpGet]
+		public Tuple<string?, string?, bool, bool>? SwitchPage(bool isNext)
+		{
+			if (isNext)
+			{
+				APIClient.CurrentPage++;
+			}
+			else
+			{
+				if (APIClient.CurrentPage == 1)
+				{
+					return null;
+				}
+				APIClient.CurrentPage--;
+			}
+
+			var res = APIClient.GetRequest<List<MessageInfoViewModel>>($"api/client/getmessages?clientId={APIClient.Client!.Id}&page={APIClient.CurrentPage}");
+			if (isNext && (res == null || res.Count == 0))
+			{
+				APIClient.CurrentPage--;
+				return Tuple.Create<string?, string?, bool, bool>(null, null, APIClient.CurrentPage != 1, false);
+			}
+
+			StringBuilder htmlTable = new();
+			foreach (var mail in res)
+			{
+				htmlTable.Append("<tr>" +
+								 $"<td>{mail.DateDelivery}</td>" +
+								 $"<td>{mail.Subject}</td>" +
+								 $"<td>{mail.Body}</td>" +
+								 "<td>" + (mail.HasRead ? "Прочитано" : "Непрочитано") + "</td>" +
+								 $"<td>{mail.Reply}</td>" +
+								 "</tr>");
+			}
+			return Tuple.Create<string?, string?, bool, bool>(htmlTable.ToString(), APIClient.CurrentPage.ToString(), APIClient.CurrentPage != 1, true);
+		}
 	}
 }

IceCreamShop/IceCreamShopClientApp/Views/Home/Mails.cshtml

@@ -1,7 +1,4 @@
-@using IceCreamShopContracts.ViewModels
+
-
-@model List<MessageInfoViewModel>
-
 @{
 	ViewData["Title"] = "Mails";
 }
@@ -10,15 +7,7 @@
 	<h1 class="display-4">Заказы</h1>
 </div>
 
-
 <div class="text-center">
-	@{
-		if (Model == null)
-		{
-			<h3 class="display-4">Авторизируйтесь</h3>
-			return;
-		}
-
     <table class="table">
         <thead>
             <tr>
@@ -31,24 +20,62 @@
                 <th>
                     Текст
                 </th>
+                <th>
+                    Статус
+                </th>
+                <th>
+                    Ответ
+                </th>
             </tr>
         </thead>
-			<tbody>
+        <tbody id="mails-table-body">
-				@foreach (var item in Model)
-				{
-					<tr>
-						<td>
-							@Html.DisplayFor(modelItem => item.DateDelivery)
-						</td>
-						<td>
-							@Html.DisplayFor(modelItem => item.Subject)
-						</td>
-						<td>
-							@Html.DisplayFor(modelItem => item.Body)
-						</td>
-					</tr>
-				}
         </tbody>
     </table>
-	}
+    <ul class="pagination justify-content-center">
+        <li id="prev-page" class="page-item">
+            <a class="page-link" href="#" aria-label="Previous">
+                <span aria-hidden="true">&laquo;</span>
+                <span class="sr-only">Предыдущее</span>
+            </a>
+        </li>
+        <li class="page-item">
+            <a id="current-page" class="page-link"></a>
+        </li>
+        <li id="next-page" class="page-item">
+            <a class="page-link" href="#" aria-label="Next">
+                <span aria-hidden="true">&raquo;</span>
+                <span class="sr-only">Следующее</span>
+            </a>
+        </li>
+    </ul>
 </div>
+
+<script>
+    function onClicked(isNext) {
+        $.ajax({
+            method: "GET",
+            url: "/Home/SwitchPage",
+            data: { isNext: isNext },
+            success: function (result) {
+                if (result != null) {
+                    if (result.item1 != null && result.item2 != null) {
+                        $("#mails-table-body").html(result.item1);
+                        $("#current-page").text(result.item2);
+                    }
+                    if (result.item3)
+                        $("#prev-page").removeClass("page-item disabled");
+                    else
+                        $("#prev-page").addClass("page-item disabled");
+                    if (result.item4)
+                        $("#next-page").removeClass("page-item disabled");
+                    else
+                        $("#next-page").addClass("page-item disabled");
+                }
+            }
+        });
+    }
+    onClicked(true);
+    $("#prev-page").on('click', () => onClicked(false));
+    $("#next-page").on('click', () => onClicked(true));
+
+</script>

IceCreamShop/IceCreamShopListImplement/Implements/MessageInfoStorage.cs

@@ -6,7 +6,7 @@ using IceCreamShopListImplement.Models;
 
 namespace IceCreamShopListImplement.Implements
 {
-    public class MessageInfoStorage
+    public class MessageInfoStorage : IMessageInfoStorage
 	{
         private readonly DataListSingleton _source;
         public MessageInfoStorage()
@@ -34,8 +34,22 @@ namespace IceCreamShopListImplement.Implements
 					result.Add(item.GetViewModel);
 				}
 			}
+
+			if (!(model.Page.HasValue && model.PageSize.HasValue))
+			{
 				return result;
 			}
+			if (model.Page * model.PageSize >= result.Count)
+			{
+				return null;
+			}
+			List<MessageInfoViewModel> filteredResult = new();
+			for (var i = (model.Page.Value - 1) * model.PageSize.Value; i < model.Page.Value * model.PageSize.Value; i++)
+			{
+				filteredResult.Add(result[i]);
+			}
+			return filteredResult;
+		}
 
         public List<MessageInfoViewModel> GetFullList()
         {
@@ -57,5 +71,18 @@ namespace IceCreamShopListImplement.Implements
             _source.Messages.Add(newMessage);
             return newMessage.GetViewModel;
         }
+
+		public MessageInfoViewModel? Update(MessageInfoBindingModel model)
+		{
+			foreach (var message in _source.Messages)
+			{
+				if (message.MessageId.Equals(model.MessageId))
+				{
+					message.Update(model);
+					return message.GetViewModel;
+				}
+			}
+			return null;
+		}
 	}
 }

IceCreamShop/IceCreamShopListImplement/Models/MessageInfo.cs

@@ -18,6 +18,10 @@ namespace IceCreamShopListImplement.Models
 
         public string Body { get; private set; } = string.Empty;
 
+		public bool HasRead { get; private set; }
+
+		public string? Reply { get; private set; }
+
 		public static MessageInfo? Create(MessageInfoBindingModel model)
         {
             if (model == null)
@@ -27,6 +31,8 @@ namespace IceCreamShopListImplement.Models
             return new()
             {
 				Body = model.Body,
+				Reply = model.Reply,
+				HasRead = model.HasRead,
 				Subject = model.Subject,
 				ClientId = model.ClientId,
 				MessageId = model.MessageId,
@@ -35,15 +41,26 @@ namespace IceCreamShopListImplement.Models
 			};
         }
 
+		public void Update(MessageInfoBindingModel model)
+		{
+			if (model == null)
+			{
+				return;
+			}
+			Reply = model.Reply;
+			HasRead = model.HasRead;
+		}
+
 		public MessageInfoViewModel GetViewModel => new()
         {
 			Body = Body,
+			Reply = Reply,
+			HasRead = HasRead,
 			Subject = Subject,
 			ClientId = ClientId,
 			MessageId = MessageId,
 			SenderName = SenderName,
 			DateDelivery = DateDelivery,
 		};
-
     }
 }