ASP.NET MVC 和存储过程无法正常工作答案

【问题标题】：ASP.NET MVC and Stored Procedures not working correctlyASP.NET MVC 和存储过程无法正常工作
【发布时间】：2017-01-01 18:03:39
【问题描述】：

所以我很可能有什么问题，我已经知道了。我只是无法弄清楚到底出了什么问题。我已经尝试了这两种不同的方法，并且每种方法都得到了不同的结果。好了，我正在尝试使用存储过程来获取视图的数据。我有两个这样的视图模型：

public class CharacterCraftNamesListViewModel
    {
        public string CharFullName { get; set; }
        public string ProfName { get; set; }
    }

和

public class CharacterCraftCraftListViewModel
    {
        public string CraftClassName { get; set; }
        public int CharCraftCharID { get; set; }
        public int CharCraftClassID { get; set; }
        public int CharCraftLevelID { get; set; }
        public bool CraftLevelSet { get; set; }
        public string CraftLevelName { get; set; }
        public bool CraftLevelMastery { get; set; }

    }

我在数据库中也有两个对应的存储过程。

CREATE PROCEDURE [dbo].[GetCharacterCraftCharacterNameProfessionName]
                @CharID int = NULL
    AS
    WITH CHCRNames_CTE ( [CCCID], [CharFull], [ProfName] )
    AS
        (SELECT 
            Character_Char_ID,
            CASE 
                    WHEN b.Char_Last_Name IS NULL THEN b.Char_First_Name
                    ELSE b.Char_First_Name + '  ' + b.Char_Last_Name
            END AS FullName,
            c.Profession_Name
            FROM CharacterCraft a LEFT OUTER JOIN
            [Character] b ON a.Character_Char_ID = b.Char_ID LEFT OUTER JOIN
            [Profession] c ON c.Profession_ID = b.Profession_Profession_ID
            )
    SELECT DISTINCT CharFull, ProfName
    FROM CHCRNames_CTE
    WHERE CCCID = @CharID

和

CREATE PROCEDURE [dbo].[GetCharacterCraftRank]
                @CharID int = NULL,
                @Rank int = NULL
    AS  
    WITH CHCR_CTE ( [Rank], [CCID], [CCCCID], [CCName], [CLCLID], [CLName], [CLTier], [CLS], [CLM])
    AS
        (SELECT
                DENSE_RANK() OVER(PARTITION BY(a.Character_Char_ID)ORDER BY (a.CraftClass_Craft_Class_ID)) AS [Rank],
                a.Character_Char_ID,
                CraftClass_Craft_Class_ID,
                c.Craft_Class_Name,
                CraftLevel_Craft_Level_ID,
                d.Craft_Level_Name,
                d.Craft_Level_Tier,
                Craft_Level_Set,
                Craft_Level_Mastery
        FROM CharacterCraft a LEFT OUTER JOIN
        [Character] b ON a.Character_Char_ID = b.Char_ID LEFT OUTER JOIN
        [CraftClass] c ON a.CraftClass_Craft_Class_ID = c.Craft_Class_ID LEFT OUTER JOIN
        [CraftLevel] d ON a.CraftLevel_Craft_Level_ID = d.Craft_Level_ID
        )
    SELECT  [CCID], [CCCCID], [CCName], [CLCLID], [CLS], [CLName], [CLM] 
    FROM CHCR_CTE 
    WHERE [CCID]= @CharID AND [Rank] = @Rank
    ORDER BY [Rank], [CLTier]

在我的控制器中，我有以下内容：

public async Task<ActionResult> Edit(int? id)
            {
                if (id == null)
                {
                    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
                } 
    var names = await db.Database.SqlQuery<CharacterCraftNamesListViewModel>( sql: "GetCharacterCraftCharacterNameProfessionName", parameters: new object[] { id } ).ToListAsync();
            var alist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 1 } ).ToListAsync();
            var blist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 2 }  ).ToListAsync();
            var clist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 3 }  ).ToListAsync();
            var characterCraft = new CharacterCraftViewModel()
            {
                CharNames = names.AsEnumerable(),
                CraftListA = alist.AsEnumerable(),
                CraftListB = blist.AsEnumerable(),
                CraftListC = clist.AsEnumerable()
            };
    if (characterCraft == null)
        {
            return HttpNotFound();
        }
        return View(characterCraft);
    }

当我查看调试器时，我看到以下内容：

id 1
姓名数=0
alist Count=0
列表计数=0
列表计数=0
角色工艺
{LotroMvc.Models.CharacterCraftViewModels.CharacterCraftViewModel}

所以我最终得到了一个空白页。

现在我尝试将存储过程放置在控制器本身中，并在调试器中得到不同的输出。

在我尝试过的控制器内部：

public async Task<ActionResult> Edit(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
var query = "WITH CHCRNames_CTE( [CCCID], [CharFull], [ProfName] ) "
                    + "AS "
                    + "( SELECT "
                    + "Character_Char_ID, "
                    + "CASE "
                    + "WHEN b.Char_Last_Name IS NULL THEN b.Char_First_Name "
                    + "ELSE b.Char_First_Name + '  ' + b.Char_Last_Name "
                    + "END AS FullName, "
                    + "c.Profession_Name "
                    + "FROM CharacterCraft a LEFT OUTER JOIN "
                    + "dbo.[Character] b ON a.Character_Char_ID = b.Char_ID LEFT OUTER JOIN "
                    + "dbo.[Profession] c ON c.Profession_ID = b.Profession_Profession_ID "
                    + ") "
                    + "SELECT DISTINCT CharFull, ProfName "
                    + "FROM CHCRNames_CTE "
                    + "WHERE CCCID = @p0";
        var names = await db.Database.SqlQuery<CharacterCraftNamesListViewModel>( query, id ).ToListAsync();
        var rank = "WITH CHCR_CTE( [Rank], [CCID], [CCCCID], [CCName], [CLCLID], [CLName], [CLTier], [CLS], [CLM] )"
                    + "AS "
                    + "( SELECT "
                    + "DENSE_RANK() OVER(PARTITION BY(a.Character_Char_ID)ORDER BY (a.CraftClass_Craft_Class_ID)) AS [Rank], "
                    + "a.Character_Char_ID, "
                    + "CraftClass_Craft_Class_ID, "
                    + "c.Craft_Class_Name, "
                    + "CraftLevel_Craft_Level_ID, "
                    + "d.Craft_Level_Name, "
                    + "d.Craft_Level_Tier, "
                    + "Craft_Level_Set, "
                    + "Craft_Level_Mastery "
                    + "FROM CharacterCraft a LEFT OUTER JOIN "
                    + "[Character] b ON a.Character_Char_ID = b.Char_ID LEFT OUTER JOIN "
                    + "[CraftClass] c ON a.CraftClass_Craft_Class_ID = c.Craft_Class_ID LEFT OUTER JOIN "
                    + "[CraftLevel] d ON a.CraftLevel_Craft_Level_ID = d.Craft_Level_ID "
                    + ") "
                    + "SELECT  [CCID], [CCCCID], [CCName], [CLCLID], [CLS], [CLName], [CLM] "
                    + "FROM CHCR_CTE "
                    + "WHERE [CCID]= @p0 AND [Rank] = @p1 "
                    + "ORDER BY [Rank], [CLTier]";
        var alist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( rank, parameters: new object[] { id, 1 } ).ToListAsync();
        var blist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( rank, parameters: new object[] { id, 2 }  ).ToListAsync();
        var clist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( rank, parameters: new object[] { id, 3 }  ).ToListAsync();
        var characterCraft = new CharacterCraftViewModel()
        {
            CharNames = names.AsEnumerable(),
            CraftListA = alist.AsEnumerable(),
            CraftListB = blist.AsEnumerable(),
            CraftListC = clist.AsEnumerable()
        };
if (characterCraft == null)
    {
        return HttpNotFound();
    }
    return View(characterCraft);
}

这在调试器中为我提供了以下信息：

这个 {LotroMvc.Controllers.CharacterCraftsController}
id 1
查询“与 CHCRNames_CTE([CCCID], [CharFull], [ProfName]) AS ( 选择 Character_Char_ID，当 b.Char_Last_Name 为 NULL THEN 时的情况
b.Char_First_Name ELSE b.Char_First_Name + ' ' + b.Char_Last_Name
END AS FullName, c.Profession_Name FROM CharacterCraft a LEFT OUTER
加入 dbo.[Character] b ON a.Character_Char_ID = b.Char_ID LEFT OUTER 加入 dbo.[职业] c ON c.Profession_ID =
b.Profession_Profession_ID ) SELECT DISTINCT CharFull, ProfName FROM CHCRNames_CTE WHERE CCCID = @p0" 名称计数 = 1
[0] {LotroMvc.Models.CharacterCraftViewModels.CharacterCraftNamesListViewModel}
CharFullName 为空
ProfName "Historian"
rank "WITH CHCR_CTE([Rank], [CCID]、[CCCCID]、[CCName]、[CLCLID]、[CLName]、[CLTier]、[CLS]、 [CLM] )AS ( SELECT DENSE_RANK() OVER(PARTITION BY(a.Character_Char_ID)ORDER BY (a.CraftClass_Craft_Class_ID)) AS [等级]，a.Character_Char_ID，CraftClass_Craft_Class_ID， c.Craft_Class_Name、CraftLevel_Craft_Level_ID、d.Craft_Level_Name、 d.Craft_Level_Tier、Craft_Level_Set、Craft_Level_Mastery FROM CharacterCraft a LEFT OUTER JOIN [Character] b ON a.Character_Char_ID = b.Char_ID 左外连接 [CraftClass] c ON a.CraftClass_Craft_Class_ID = c.Craft_Class_ID 左外连接 [CraftLevel] d ON a.CraftLevel_Craft_Level_ID = d.Craft_Level_ID ) 选择 [CCID]、[CCCCID]、[CCName]、[CLCLID]、[CLS]、[CLName]、 [CLM] 来自 CHCR_CTE，其中 [CCID]= @p0 AND [Rank] = @p1 ORDER BY [等级]、[CLTier]”
alist 计数 = 9
[0] {LotroMvc.Models.CharacterCraftViewModels.CharacterCraftCraftListViewModel}
CharCraftCharID 0
CharCraftClassID 0
CharCraftLevelID 0
CraftClassName 为空
CraftLevelMastery 错误
CraftLevelName 为空
CraftLevelSet 错误
（等等）

虽然 alist 中的数据肯定是错误的，但它的计数是正确的。名称显示正确的 ProfName 但 CharFullName 上的数据不正确。所以我不知道在这里做什么。如果我在 T-SQL 中执行存储过程，我会显示正确的数据，但这仅在服务器上。我一直无法让 MVC 和 SQL 正确播放，我知道这是我的代码。我只是看不出代码有什么问题。有没有想过我哪里出错了？

【问题讨论】：

标签： c# asp.net sql-server stored-procedures

【解决方案1】：

好的，我想通了。有两件事错误导致了这个问题。使用以下代码，程序没有正确调用 SQL Server：

var names = await db.Database.SqlQuery<CharacterCraftNamesListViewModel>( sql: "GetCharacterCraftCharacterNameProfessionName", parameters: new object[] { id } ).ToListAsync();
        var alist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 1 } ).ToListAsync();
        var blist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 2 }  ).ToListAsync();
        var clist = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>( sql: "GetCharacterCraftRank", parameters: new object[] { id, 3 }  ).ToListAsync();

虽然 SQLQuery 调用在我阅读的所有内容中都是正确的，但当我将程序输出的内容放入 SSMS 时，我得到了空集。所以我将sql：“GetCharacterNameProfessionName”和sql：“GetCharacterCraftRank”更改为sql：“GetCharacterNameProfessionName @p0”和sql：“GetCharacterCraftRank @p0，@p1”。然后，这会向我输出类似于我在控制器中写出查询时的输出。

下一个问题归结为命名约定。当我做一个数据库优先模型来看看会发生什么时，我真的很困惑，而且它确实有效。但我意识到，当我这样做时，我能够将存储过程列的名称映射到代码中的列。那时我突然意识到，作为对我的存储过程的简单更改，让列名与我在程序中放入的内容相匹配，并且一切正常。一些小的调整，现在我的 get 控制器看起来像这样：

public async Task<ActionResult> Edit(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        var characterCraft = new CharacterCraftViewModel()
        {
            CharNames = await db.Database.SqlQuery<CharacterCraftNamesListViewModel>(sql: "GetCharacterCraftCharacterNameProfessionName @p0", parameters: new object[] { id }).FirstAsync(),
            CraftListA = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>(sql: "GetCharacterCraftRank @p0, @p1", parameters: new object[] { id, 1 }).ToListAsync(),
            CraftListB = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>(sql: "GetCharacterCraftRank @p0, @p1", parameters: new object[] { id, 2 }).ToListAsync(),
            CraftListC = await db.Database.SqlQuery<CharacterCraftCraftListViewModel>(sql: "GetCharacterCraftRank @p0, @p1", parameters: new object[] { id, 3 }).ToListAsync()
        };

        if (characterCraft == null)
        {
            return HttpNotFound();
        }
        return View(characterCraft);
    }

我希望这对其他人有所帮助。

【讨论】：