■ CRUD 구현 WEB API 애플리케이션을 만드는 방법을 보여준다.
[TestServer 프로젝트]
▶ Models/ValueRepository.cs
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using System.Collections.Generic; namespace TestServer { /// <summary> /// 값 저장소 /// </summary> public static class ValueRepository { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region Field /// <summary> /// 값 리스트 /// </summary> public static List<string> ValueList = new List<string>() { "Console", "WinForm", "WPF" }; #endregion } } |
▶ Models/TransferItem.cs
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namespace TestServer.Models { /// <summary> /// 전송 항목 /// </summary> public class TransferItem { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 상태 - Status /// <summary> /// 상태 /// </summary> public string Status { get; set; } #endregion #region 컨텐트 - Content /// <summary> /// 컨텐트 /// </summary> public string Content { get; set; } #endregion } } |
▶ Controllers/ValueController.cs
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using Microsoft.AspNetCore.Mvc; using Newtonsoft.Json; using TestServer.Models; namespace TestServer.Controllers { /// <summary> /// 값 컨트롤러 /// </summary> [ApiController] [Route("api/[controller]")] public class ValueController : ControllerBase { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 값 추가하기 - AddValue(value) /// <summary> /// 값 추가하기 /// </summary> /// <param name="value">값</param> /// <returns>전송 항목</returns> [HttpPost] public TransferItem AddValue([FromBody]string value) { TransferItem item = new TransferItem(); if(ValueRepository.ValueList.Contains(value)) { item.Status = "FAILURE"; item.Content = null; return item; } else { ValueRepository.ValueList.Add(value); item.Status = "OK"; item.Content = null; return item; } } #endregion #region 값 수정하기 - UpdateValue(index, value) /// <summary> /// 값 수정하기 /// </summary> /// <param name="index">인덱스</param> /// <param name="value">값</param> /// <returns>전송 항목</returns> [HttpPut("{index:int}")] public TransferItem UpdateValue(int index, [FromBody]string value) { TransferItem item = new TransferItem(); if(index < 0 || index >= ValueRepository.ValueList.Count) { item.Status = "FAILURE"; item.Content = null; return item; } ValueRepository.ValueList[index] = value; item.Status = "OK"; item.Content = null; return item; } #endregion #region 값 삭제하기 - DeleteValue(index) /// <summary> /// 값 삭제하기 /// </summary> /// <param name="index">인덱스</param> /// <returns>전송 항목</returns> [HttpDelete("{index:int}")] public TransferItem DeleteValue(int index) { TransferItem item = new TransferItem(); if(index < 0 || index >= ValueRepository.ValueList.Count) { item.Status = "FAILURE"; item.Content = null; return item; } ValueRepository.ValueList.RemoveAt(index); item.Status = "OK"; item.Content = null; return item; } #endregion #region 값 리스트 구하기 - GetValueList() /// <summary> /// 값 리스트 구하기 /// </summary> /// <returns>전송 항목</returns> [HttpGet] public TransferItem GetValueList() { TransferItem item = new TransferItem(); item.Status = "OK"; item.Content = JsonConvert.SerializeObject(ValueRepository.ValueList); return item; } #endregion #region 값 구하기 - GetValue(index) /// <summary> /// 값 구하기 /// </summary> /// <param name="index">인덱스</param> /// <returns>전송 항목</returns> [HttpGet("{index:int}")] public TransferItem GetValue(int index) { TransferItem item = new TransferItem(); if(index < 0 || index >= ValueRepository.ValueList.Count) { item.Status = "FAILURE"; item.Content = null; return item; } item.Status = "OK"; item.Content = JsonConvert.SerializeObject(ValueRepository.ValueList[index]); return item; } #endregion } } |
[TestClient 프로젝트]
▶ Program.cs
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using System; using System.Collections.Generic; using System.Net.Http; using System.Net.Http.Headers; using System.Threading.Tasks; using Newtonsoft.Json; namespace TestClient { /// <summary> /// 프로그램 /// </summary> class Program { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 프로그램 시작하기 - Main() /// <summary> /// 프로그램 시작하기 /// </summary> static void Main() { // 포트 5569는 서버 설정과 일치시킨다. using(HttpClient client = GetHTTPClient("http://localhost:5569/")) { List<string> valueList; Console.WriteLine(); Console.WriteLine("값 리스트를 조회합니다."); Console.WriteLine("--------------------------------------------------"); valueList = GetValueList(client).GetAwaiter().GetResult(); for(int i = 0; i < valueList.Count; i++) { Console.WriteLine(valueList[i]); } Console.WriteLine(); Console.WriteLine("값을 조회합니다."); Console.WriteLine("--------------------------------------------------"); string value = GetValue(client, 0).GetAwaiter().GetResult(); Console.WriteLine(value); Console.WriteLine(); Console.WriteLine("값을 추가합니다."); Console.WriteLine("--------------------------------------------------"); bool status = AddValue(client, "JAVA").GetAwaiter().GetResult(); Console.WriteLine(status); Console.WriteLine(); Console.WriteLine("값 리스트를 조회합니다."); Console.WriteLine("--------------------------------------------------"); valueList = GetValueList(client).GetAwaiter().GetResult(); for(int i = 0; i < valueList.Count; i++) { Console.WriteLine(valueList[i]); } Console.WriteLine(); Console.WriteLine("값을 수정합니다."); Console.WriteLine("--------------------------------------------------"); status = UpdateValue(client, 3, "JAVA2").GetAwaiter().GetResult(); Console.WriteLine(status); Console.WriteLine(); Console.WriteLine("값 리스트를 조회합니다."); Console.WriteLine("--------------------------------------------------"); valueList = GetValueList(client).GetAwaiter().GetResult(); for(int i = 0; i < valueList.Count; i++) { Console.WriteLine(valueList[i]); } Console.WriteLine(); Console.WriteLine("값을 삭제합니다."); Console.WriteLine("--------------------------------------------------"); status = DeleteValue(client, 3).GetAwaiter().GetResult(); Console.WriteLine(status); Console.WriteLine(); Console.WriteLine("값 리스트를 조회합니다."); Console.WriteLine("--------------------------------------------------"); valueList = GetValueList(client).GetAwaiter().GetResult(); for(int i = 0; i < valueList.Count; i++) { Console.WriteLine(valueList[i]); } Console.WriteLine("--------------------------------------------------"); Console.WriteLine("아무 키나 눌러 주시기 바랍니다."); Console.ReadKey(true); } } #endregion #region HTTP 클라이언트 구하기 - GetHTTPClient(baseAddress) /// <summary> /// HTTP 클라이언트 구하기 /// </summary> /// <param name="baseAddress">기준 주소</param> /// <returns>HTTP 클라이언트</returns> private static HttpClient GetHTTPClient(string baseAddress) { HttpClient client = new HttpClient(); client.BaseAddress = new Uri(baseAddress); client.DefaultRequestHeaders.Accept.Clear(); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); return client; } #endregion #region 값 리스트 구하기 - GetValueList(client) /// <summary> /// 값 리스트 구하기 /// </summary> /// <param name="client">클라이언트</param> /// <returns>값 리스트</returns> private static async Task<List<string>> GetValueList(HttpClient client) { string url = string.Format("api/value/"); HttpResponseMessage response = await client.GetAsync(url); if(response.IsSuccessStatusCode) { TransferItem item = await response.Content.ReadAsAsync<TransferItem>(); if(item.Status.Equals("OK")) { return JsonConvert.DeserializeObject<List<string>>(item.Content); } } return null; } #endregion #region 값 구하기 - GetValue(client, index) /// <summary> /// 값 구하기 /// </summary> /// <param name="client">클라이언트</param> /// <param name="index">ID</param> /// <returns>값</returns> private static async Task<string> GetValue(HttpClient client, int index) { string url = string.Format("api/value/{0}", index); HttpResponseMessage response = await client.GetAsync(url); if(response.IsSuccessStatusCode) { TransferItem item = await response.Content.ReadAsAsync<TransferItem>(); if(item.Status.Equals("OK")) { return JsonConvert.DeserializeObject<string>(item.Content); } } return null; } #endregion #region 값 추가하기 - AddValue(client, value) /// <summary> /// 값 추가하기 /// </summary> /// <param name="client">클라이언트</param> /// <param name="value">값</param> /// <returns>처리 결과</returns> private static async Task<bool> AddValue(HttpClient client, string value) { string url = string.Format("api/value/"); var response = await client.PostAsJsonAsync<string>(url, value); if(response.IsSuccessStatusCode) { TransferItem item = await response.Content.ReadAsAsync<TransferItem>(); if(item.Status.Equals("OK")) { return true; } } return false; } #endregion #region 값 수정하기 - UpdateValue(client, index, value) /// <summary> /// 값 수정하기 /// </summary> /// <param name="client">클라이언트</param> /// <param name="index">인덱스</param> /// <param name="value">값</param> /// <returns>처리 결과</returns> private static async Task<bool> UpdateValue(HttpClient client, int index, string value) { string url = string.Format("api/value/{0}", index); var response = await client.PutAsJsonAsync(url, value); if(response.IsSuccessStatusCode) { TransferItem item = await response.Content.ReadAsAsync<TransferItem>(); if(item.Status.Equals("OK")) { return true; } } return false; } #endregion #region 값 삭제하기 - DeleteValue(client, index) /// <summary> /// 값 삭제하기 /// </summary> /// <param name="client">클라이언트</param> /// <param name="index">인덱스</param> /// <returns>처리 결과</returns> private static async Task<bool> DeleteValue(HttpClient client, int index) { string url = string.Format("api/value/{0}", index); var response = await client.DeleteAsync(url); if(response.IsSuccessStatusCode) { TransferItem item = await response.Content.ReadAsAsync<TransferItem>(); if(item.Status.Equals("OK")) { return true; } } return false; } #endregion } } |
