Program.cs

@@ -22,6 +22,8 @@ using NHibernate.Driver;
 using FirmTracker_Server.Controllers;
 using FirmTracker_Server.nHibernate.Products;
 using FirmTracker_Server.nHibernate;
+using FirmTracker_Server.Utilities.Converters;
+using FirmTracker_Server.Utilities.Swagger;
 
 namespace FirmTracker_Server
 {
@@ -60,10 +62,18 @@ namespace FirmTracker_Server
                         .AllowAnyHeader()
                         .AllowAnyMethod());
             });
-            builder.Services.AddControllers();
+            builder.Services.AddControllers()
+                .AddJsonOptions(options =>
+                {
+                    options.JsonSerializerOptions.Converters.Add(new DateTimeConverter());
+                });
+                ;
 
             builder.Services.AddEndpointsApiExplorer();
-            builder.Services.AddSwaggerGen();
+            builder.Services.AddSwaggerGen(c =>
+            {
+                c.SchemaFilter<SwaggerDateTimeSchemaFilter>();
+            });
 
             var app = builder.Build();
             var configSwagger = new ConfigurationBuilder()

Utilities/Converters/DateTimeConverter.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace FirmTracker_Server.Utilities.Converters
+{
+    public class DateTimeConverter : JsonConverter<DateTime>
+    {
+        private const string DateFormat = "yyyy-MM-ddTHH:mm";
+
+        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                if (DateTime.TryParseExact(reader.GetString(), DateFormat, null, System.Globalization.DateTimeStyles.None, out var date))
+                {
+                    return date;
+                }
+            }
+            throw new JsonException("Invalid date format");
+        }
+
+        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
+        {
+            writer.WriteStringValue(value.ToString(DateFormat));
+        }
+    }
+}

Utilities/Swagger/SwaggerDateTimeSchemaFilter.cs

@@ -0,0 +1,18 @@
+using Microsoft.OpenApi.Any;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace FirmTracker_Server.Utilities.Swagger
+{
+    public class SwaggerDateTimeSchemaFilter : ISchemaFilter
+    {
+        public void Apply(OpenApiSchema schema, SchemaFilterContext context)
+        {
+            if (context.Type == typeof(DateTime) || context.Type == typeof(DateTime?))
+            {
+                schema.Format = "yyyy-MM-ddTHH:mm";
+                schema.Example = new OpenApiString(DateTime.Now.ToString("yyyy-MM-ddTHH:mm"));
+            }
+        }
+    }
+}

nHIbernate/Expenses/Expense.cs

@@ -16,12 +16,14 @@
  */
 
 using FirmTracker_Server.nHibernate.Reports;
+using System.ComponentModel.DataAnnotations;
 
 namespace FirmTracker_Server.nHibernate.Expenses
 {
     public class Expense
     {
         public virtual int Id { get; set; }
+        [DataType(DataType.DateTime)]
         public virtual DateTime Date { get; set; }
         public virtual decimal Value { get; set; }
         public virtual string Description { get; set; }

nHIbernate/Reports/Report.cs

@@ -18,13 +18,16 @@
 using FirmTracker_Server.nHibernate.Expenses;
 using FirmTracker_Server.nHibernate.Transactions;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 
 namespace FirmTracker_Server.nHibernate.Reports
 {
     public class Report
     {
         public virtual int Id { get; set; }
+        [DataType(DataType.DateTime)]
         public virtual DateTime FromDate { get; set; }
+        [DataType(DataType.DateTime)]
         public virtual DateTime ToDate { get; set; }
         public virtual decimal TotalIncome { get; set; }
         public virtual decimal TotalExpenses { get; set; }

nHibernate/Transactions/Transaction.cs

@@ -2,6 +2,7 @@
 using FirmTracker_Server.nHibernate.Reports;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
 using System.Linq;
 
 namespace FirmTracker_Server.nHibernate.Transactions
@@ -9,6 +10,7 @@ namespace FirmTracker_Server.nHibernate.Transactions
     public class Transaction
     {
         public virtual int Id { get; set; }
+        [DataType(DataType.DateTime)]
         public virtual DateTime Date { get; set; }
         public virtual int EmployeeId { get; set; }
         public virtual IList<TransactionProduct> TransactionProducts { get; set; } = new List<TransactionProduct>();

nHibernate/Transactions/Transaction2.cs

@@ -2,6 +2,7 @@
 using FirmTracker_Server.nHibernate.Reports;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
 using System.Linq;
 
 namespace FirmTracker_Server.nHibernate.Transactions
@@ -9,6 +10,7 @@ namespace FirmTracker_Server.nHibernate.Transactions
     public class Transaction2
     {
         public virtual int Id { get; set; }
+        [DataType(DataType.DateTime)]
         public virtual DateTime Date { get; set; }
         public virtual int EmployeeId { get; set; }
         public virtual IList<TransactionWithProducts> TransactionProducts { get; set; } = new List<TransactionWithProducts>();