Этап 1. Форматирование данных в колонках

FurnitureAssembly/FurnitureAssembly/DataGridViewExtension.cs

@@ -44,6 +44,10 @@ namespace FurnitureAssembly
                     {
                         column.Width = columnAttr.Width;
                     }
+                    if (columnAttr.IsFormatable)
+                    {
+                        column.DefaultCellStyle.Format = columnAttr.Formatter;
+                    }
                 }
             }
         }

FurnitureAssembly/FurnitureAssemblyContracts/Attributes/ColumnAttribute.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.Serialization;
 
 namespace FurnitureAssemblyContracts.Attributes
 {
@@ -7,18 +8,23 @@ namespace FurnitureAssemblyContracts.Attributes
     {
         public ColumnAttribute(string title = "", bool visible = true, int width
        = 0, GridViewAutoSize gridViewAutoSize = GridViewAutoSize.None, bool
-       isUseAutoSize = false)
+       isUseAutoSize = false, bool isFormatable = false, string? formatter = null)
         {
             Title = title;
             Visible = visible;
             Width = width;
             GridViewAutoSize = gridViewAutoSize;
             IsUseAutoSize = isUseAutoSize;
+            IsFormatable = isFormatable;
+            Formatter = formatter;
+
         }
         public string Title { get; private set; }
         public bool Visible { get; private set; }
         public int Width { get; private set; }
         public GridViewAutoSize GridViewAutoSize { get; private set; }
         public bool IsUseAutoSize { get; private set; }
+        public bool IsFormatable { get; private set; }
+        public string? Formatter { get; private set; }
     }
 }

FurnitureAssembly/FurnitureAssemblyContracts/ViewModels/ComponentViewModel.cs

@@ -10,7 +10,7 @@ namespace FurnitureAssemblyContracts.ViewModels
         public int Id { get; set; }
         [Column(title: "Название компонента", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public string ComponentName { get; set; } = string.Empty;
-        [Column(title: "Цена", width: 70)]
+        [Column(title: "Цена", width: 70, isFormatable: true, formatter: "0.00##")]
         public double Cost { get; set; }
     }
 }

FurnitureAssembly/FurnitureAssemblyContracts/ViewModels/FurnitureViewModel.cs

@@ -14,7 +14,7 @@ namespace FurnitureAssemblyContracts.ViewModels
         public int Id { get; set; }
         [Column(title: "Название изделия", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public string FurnitureName { get; set; } = string.Empty;
-        [Column(title: "Цена", width: 70)]
+        [Column(title: "Цена", width: 70, isFormatable: true, formatter: "0.00##")]
         public double Price { get; set; }
         [Column(visible: false)]
         public Dictionary<int, (IComponentModel, int)> FurnitureComponents{ get; set; } = new();

FurnitureAssembly/FurnitureAssemblyContracts/ViewModels/MessageInfoViewModel.cs

@@ -12,15 +12,15 @@ namespace FurnitureAssemblyContracts.ViewModels
         public int? ClientId { get; set; }
         [Column(title: "Отправитель", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public string SenderName { get; set; } = string.Empty;
-        [Column(title: "Дата письма", width: 100)]
+        [Column(title: "Дата письма", width: 100, isFormatable: true, formatter: "dd/MM/yyyy")]
         public DateTime DateDelivery { get; set; }
         [Column(title: "Заголовок", width: 170)]
         public string Subject { get; set; } = string.Empty;       
         [Column(title: "Текст", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public string Body { get; set; } = string.Empty;
-        [DisplayName("Прочитано")]
+        [Column(title: "Прочитано", width: 10)]
         public bool IsRead { get; set; }
-        [DisplayName("Ответ")]
+        [Column(title: "Ответ", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public string? Reply { get; set; }
 
         public int Id => throw new NotImplementedException();

FurnitureAssembly/FurnitureAssemblyContracts/ViewModels/OrderViewModel.cs

@@ -23,13 +23,13 @@ namespace FurnitureAssemblyContracts.ViewModels
         public string FurnitureName { get; set; } = string.Empty;
         [Column(title: "Количество", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public int Count { get; set; }
-        [Column(title: "Сумма", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
+        [Column(title: "Сумма", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true, isFormatable: true, formatter: "0.00##")]
         public double Sum { get; set; }
         [Column(title: "Статус", gridViewAutoSize: GridViewAutoSize.Fill, isUseAutoSize: true)]
         public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
-        [Column(title: "Дата создания", width: 100)]
+        [Column(title: "Дата создания", width: 100, isFormatable: true, formatter: "dd/MM/yyyy")]
         public DateTime DateCreate { get; set; } = DateTime.Now;
-        [Column(title: "Дата выполнения", width: 100)]
+        [Column(title: "Дата выполнения", width: 100, isFormatable: true, formatter: "dd/MM/yyyy")]
         public DateTime? DateImplement { get; set; }
         [Column(visible: false)]
         public int? ImplementerId { get; set; }

FurnitureAssembly/FurnitureAssemblyContracts/ViewModels/ShopViewModel.cs

@@ -11,7 +11,7 @@ namespace FurnitureAssemblyContracts.ViewModels
         public string ShopName { get; set; } = string.Empty;
         [Column(title: "Адрес магазина", isUseAutoSize: true, gridViewAutoSize: GridViewAutoSize.Fill)]
         public string Address { get; set; } = string.Empty;
-        [Column(title: "Дата открытия", width: 100)]
+        [Column(title: "Дата открытия", width: 100, isFormatable: true, formatter: "dd/MM/yyyy")]
         public DateTime DateOpening { get; set; }
 
         public Dictionary<int, (IFurnitureModel, int)> Furnitures { get; set; } = new();