1.加入Project對(duì)象模型

public class Project{[Key][MaxLength(32)]public string ID { get; set; }public string Name { get; set; }public int Order { get; set; }public ICollection<UserStory> Stories { get; set; }public ApplicationUser Creator { get; set; }public DateTime CreateTime { get; set; }public ApplicationUser Modifier { get; set; }public DateTime UpdateTime { get; set; }}

2.將Project關(guān)聯(lián)到Story

public ICollection<UserStory> Stories { get; set; }

3.添加projectcontroller

遇到個(gè)bug：

warning CS0169: The field 'UserStoryController.mystr' is never used System.Data.SqlClient.SqlException: Column 'Project.ID' is not the same length or scale as referencing column 'UserStories.ProjectID' in foreign key 'FK_UserStories_Project_ProjectID'. Columns participating in a foreign key relationship must be defined wit h the same length and scale. Could not create constraint or index. See previous errors.at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)

這是由于系統(tǒng)生成的代碼不能識(shí)別外鍵字段長(zhǎng)度導(dǎo)致。

fix it

migrationBuilder.AddColumn<string>(name: "ProjectID",table: "UserStories",maxLength:32,nullable: true);

啟動(dòng)。一切正常

　4. 下面來修改 Create New

刪除 創(chuàng)建時(shí)間和更新時(shí)間，改由服務(wù)器賦值。

public async Task<IActionResult> Create(UserStoryViewModel userStoryViewModel){if (ModelState.IsValid){//mapping UserStory usNew = map.Map<UserStory>(userStoryViewModel);usNew.ID = Guid.NewGuid().ToString("N");usNew.StatusCode = "Unstarted";usNew.Creator = _userManager.FindByNameAsync(User.Identity.Name).Result;usNew.CreateTime = DateTime.Now;usNew.Order = _context.UserStories.Max(t => t.Order)+1;_context.UserStories.Add(usNew);await _context.SaveChangesAsync();return RedirectToAction("Index");}return View("OK");}

　　details 和index刪除 createtime

5.menu加入project

6.加入ViewStrories Action

<a asp-action="ViewStories" asp-route-id="@item.ID">View Stories</a>

7.修改StoryController加入解析id　　

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完成。?

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轉(zhuǎn)載于:https://www.cnblogs.com/chenfulai/p/5818090.html

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