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根據結果​​集在數據庫中更新或插入記錄

[英]Update or Insert records in database based on result set

我有這樣的桌子

在此處輸入圖片說明

我還有另一個表sections ,其中有6個節,其ID從1 to 6 我從用戶那里獲得了部分ID的列表,該列表提供了有關用戶當前活動部分的信息。 假設返回給我的列表具有ID為1用戶,其區段ID如下{2,3,4,5}所示。 現在我的問題是

  1. 如何將此部分ID列表傳遞給存儲過程
  2. 我要更新的是記錄的活動標志,其中段ID為1,用戶ID為1,因為段ID的列表中沒有條目1
  3. 我想在用戶ID 1的表中插入新的ID為5的記錄,因為它在ID列表中返回。

誰能告訴我如何實現這一目標?

我可以從以下查詢中獲取total section id's

select Id from sections

但不知道我會在total list of section id's之間進行迭代,並比較從C#返回list of section idslist of section ids

回答完整的問題。

1.就像我在評論中說的: 表值參數

首先創建一個UDTT來存儲您的部分ID,以供存儲過程輸入。

CREATE TYPE [dbo].[SectionIdUDTT] AS TABLE(
    [id] int NOT NULL
)

將此UDTT用作存儲過程的參數:

ALTER PROCEDURE [dbo].[YourSPname] @SectionId SectionIdUDTT readonly,
    @UserId INT
AS
BEGIN

為了調用此存儲過程,必須先填充SectionIdUDTT,然后再調用存儲過程。

DECLARE @SectionId AS SectionIdUDTT;

INSERT INTO @SectionId 
--your values here

EXEC YourSPname @SectionId, @UserId;

看一下DataTable類,以便從C#調用它。 確保用戶具有對UDTT的執行權限。

2在存儲過程中

將記錄設置為不活動的用戶已存在但不在表值參數中。

UPDATE YourTable
SET IsActive = 0
WHERE UserId = @UserId
    AND SectionId NOT IN (SELECT id FROM @SectionId)
    AND SectionId IN (SELECT Id FROM sections) --Not really needed

3在存儲過程中

只需插入尚不存在的記錄。 我只是假設id是一個身份列。

INSERT INTO YourTable (UserId, SectionId, IsActive)
SELECT @UserId,
    s.id,
    1
FROM @SectionId s
WHERE NOT EXISTS (
    SELECT 1
    FROM YourTable y
    WHERE y.SectionId = s.id
        AND y.UserId = @UserId
    )

我建議您在存儲過程中進行事務管理

首先,我創建了一個將調用存儲過程的方法,向該方法傳遞了一個sections列表(節表實體)和客戶ID

public bool SaveChatSectionUserMapping(List<Sections> lstSections, int customerId)
        {
            con = new SqlConnection(connectionString);
            bool isUpdated = false;
            try
            {
                string xmlString = string.Empty;
                xmlString = XMLOperations.WriteXML(lstSections);
                SqlCommand cmd = new SqlCommand("spUpdateSections", con);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.Add("@XMLData", SqlDbType.Xml).Value = xmlString;
                cmd.Parameters.Add("@CustomerId", SqlDbType.Int).Value = customerId;
                SqlParameter param = new SqlParameter();
                param.SqlDbType = SqlDbType.Bit;
                param.Direction = ParameterDirection.Output;
                param.ParameterName = "@Result";
                cmd.Parameters.Add(param);
                con.Open();
                cmd.ExecuteNonQuery();
                isUpdated = (param.Value != DBNull.Value) ? Convert.ToBoolean(param.Value) : false;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (con.State == ConnectionState.Open)
                    con.Close();
            }
            return isUpdated;
        }

我從這一行獲得的xmlString的值xmlString = XMLOperations.WriteXML(lstSections); 就是這樣

<ArrayOfSection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Sections>
    <UserId>1</UserId>
    <SectionId>1</SectionId>
    <IsActive>true</IsActive>
  </Sections>
  <Sections>
    <UserId>1</UserId>
    <SectionId>2</SectionId>
    <IsActive>true</IsActive>
  </Sections>
  <Sections>
    <UserId>1</UserId>
    <SectionId>5</SectionId>
    <IsActive>true</IsActive>
  </Sections>
</ArrayOfSection>

現在在存儲過程中

CREATE Procedure [dbo].[spUpdateSections]  
(  
 @XMLData as XML,
 @CustomerId INT,  
 @Result int Output

)  
AS
BEGIN
SET NOCOUNT ON;  
    Declare @ErrorCode Varchar(100) = '',@propertyCount VArchar(100) = '',@currentCount int=1,@SectionId int, @IsActive bit

Begin TRY

UPDATE Sections
SET
    IsActive = 0
WHERE
    UserId = @CustomerId

SELECT @propertyCount = convert(VARCHAR, @XMLData.query ('count(/ArrayOfSection/Sections)'))
SET @currentCount = 1

     while (@currentCount<=@propertyCount)       
     Begin 
     SET @SectionId = @XMLData.value('data(/ArrayOfSection/Sections[sql:variable("@currentCount")]/SectionId)[1]', 'INT') 
     SET @IsActive = @XMLData.value('data(/ArrayOfSection/Sections[sql:variable("@currentCount")]/IsActive)[1]', 'BIT')

               If Exists (SELECT *
                          FROM
                              Sections
                          WHERE
                              UserId = @CustomerId
                              AND SectionId = @SectionId)
BEGIN
       IF(@IsActive=1) 
       BEGIN 
            UPDATE Sections
             SET
                 IsActive = 1
             WHERE
                 UserId = @CustomerId AND
                 SectionId = @SectionId

        END
END

ELSE
       BEGIN
       IF(@IsActive=1) 
       BEGIN 
INSERT INTO Sections
           ([SectionId]
           ,[UserId]
           ,[IsActive])
     VALUES
           (@SectionId,@CustomerId,1)
        END
    END

SET @currentCount = @currentCount + 1 
       End 

       SET @Result = 1
           ErrorCode:  
           If(@ErrorCode !='')
           BEGIN
--SELECT @BSErrorResult = doctor.GetErrorCodeDetail(@ErrorCode)
SET @Result = 2
           END  
    END TRY        
    BEGIN CATCH     
      --Declaring Variable for formating error  
      Declare @ErrorMessage  VARCHAR(max),  
       @ErrorSeverity  INT,  
       @ErrorState   INT

--SELECTING TECHNICAL ERROR   
SELECT @ErrorMessage = error_message()
     , @ErrorSeverity = error_severity()
     , @ErrorState = error_state()
     , @ErrorMessage = @ErrorMessage + '  ' + db_name() + '  ' + ' ' + object_name(@@PROCID);   

      RAISERROR (  
         @ErrorMessage, -- Message text.  
         @ErrorSeverity, -- Severity.  
         @ErrorState -- State.  
           );   
     End CATCH    



END

生成XMl的另一種方法是使用XElement這樣的

XElement xml = new XElement("Sections",
                                from col in lstSections
                                select new XElement("rows",
                                               new XElement("UserId", col.UserId),
                                               new XElement("SectionId", col.SectionId),
                                               new XElement("IsActive", col.IsActive)));

                              string  xmlString = xml.ToString();

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