C# 在CSV文件中将数据从一行解析为多行

我是SSIS新手，需要一些帮助了解如何解析这些数据。课程级学习目标需要拆分为多行，[]中的数据需要移动到自己的列中。任何帮助都将不胜感激。CSV文件包含多条记录。下面的示例只是一条记录

CSV文件的当前格式：

Prefix/Code,Name,Credits,Description,Course-level Learning Objectives

ABE 095,Keys to Academic Success,3.0 ,"Basic .. assessment. ","   

Identify learn. [EXPLORE] 
Evaluate personal,  goals. [ACT] 
Utilize development. [EXPLORE] 
"

文件需要采用的格式

Prefix/Code,Name,Credits,Description,Course-level Learning Objectives,Type

ABE 095,Keys to Academic Success,3.0 ,"Basic .. assessment.","Identify learn.", [EXPLORE] 
ABE 095,Keys to Academic Success,3.0 ,"Basic .. assessment.","Evaluate goals.", [ACT] 
ABE 095,Keys to Academic Success,3.0 ,"Basic .. assessment.","Utilize dev.", [EXPLORE] 

---

在SSIS 2008中没有直接使用文件的方法，但可以在SSIS 2012中完成，然后透视数据。如果要在SSIS 2008中执行此操作，应使用脚本任务格式化文件，然后在DF中使用平面文件源，在脚本任务中，应使用文件读取器完成此操作，有关拆分此文件的详细信息，请参阅此链接基本步骤：

使用SSIS将数据放入SQL Server中的表中

斩断“课程级学习目标”之龙

解开结果

以下是“n”索引函数的代码片段：

    CREATE FUNCTION [dbo].[udf_NthIndex] 
                   (@Input     VARCHAR(8000), 
                    @Delimiter CHAR(1), 
                    @Ordinal   INT) 

    RETURNS INT 
    AS 

      BEGIN 

        DECLARE  @Pointer INT, 
                 @Last    INT, 
                 @Count   INT 

        SET @Pointer = 1 
        SET @Last = 0 
        SET @Count = 1 

        WHILE (2 > 1) 
          BEGIN 
            SET @Pointer = CHARINDEX(@Delimiter,@Input,@Pointer) 
            IF @Pointer = 0 
              BREAK 
            IF @Count = @Ordinal 

              BEGIN 
                SET @Last = @Pointer 
                BREAK 
              END 
            SET @Count = @Count + 1 
            SET @Pointer = @Pointer + 1 

          END 

        RETURN @Last 

      END

    GO
;

该方法使用“n”索引函数和

---

如果您能够使用正则表达式，则可以节省一些代码。在SQL Server 2008中使用正则表达式需要CLR。在向您展示如何一步一步地完成这项工作方面做得很好。该解决方案对于每个课程中少量的“类型”值足够有效

谢谢你格式化我的帖子。我已经做了几个小时的研究来找出如何做到这一点，这让我发疯。比林克：我注意到我遇到的许多帖子都得到了你的回复。你能帮我一个解决方案吗？你能在数据库表中至少暂时存储数据吗？例如SQL Server？是的，SQL Server可用于将数据插入表中。您是否有权在SQL Server数据库中创建用户定义的标量值函数？另外，它是什么版本的SQL Server？2008？我下面的回答假设您可以创建一个用户定义的标量值函数，并且您正在使用SQL Server 2008。祝你好运。SSIS 2012是否提供了更多数据解析工具？我熟悉vb和java，所以我理解c#，但butt的问题是2008不提供脚本调试，这使得我很难找到错误所在。如果是脚本组件，您无法在ssis 2008中调试，但可以在脚本任务中调试，为此，您必须将解决方案的属性设置为32位，或者，您也可以始终添加MsgBox（column.ToString（））以在执行期间查看结果

WITH s1
    AS ( SELECT 'ABE 095' AS [Prefix/Code]
              , 'Keys to Academic Success' AS Name
              , '3.0' AS Credits
              , 'Basic .. assessment. ' AS Description
              , '   

Identify learn. [EXPLORE] 
Evaluate personal,  goals. [ACT] 
Utilize development. [EXPLORE] 
' AS [Course-level Learning Objectives]
       ) , s2
    AS ( SELECT [Prefix/Code]
              , Name
              , Credits
              , Description
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 2
                                ) + 2 AS Type1Start
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 3
                                ) - dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                                               ) , 2
                                                    ) + 0 AS Type1Length
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 3
                                ) + 2 AS Type2Start
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 4
                                ) - dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                                               ) , 3
                                                    ) + 0 AS Type2Length
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 4
                                ) + 2 AS Type3Start
              , dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                           ) , 5
                                ) - dbo.udf_NthIndex( [Course-level Learning Objectives] , CHAR( 13
                                                                                               ) , 4
                                                    ) + 0 AS Type3Length
           FROM s1
       ) , s3
    AS ( SELECT s2.[Prefix/Code]
              , s2.Name
              , s2.Credits
              , s2.Description
              , RTRIM( LTRIM( SUBSTRING( s1.[Course-level Learning Objectives] , s2.Type1Start , Type1Length
                                       )
                            )
                     )AS Type1_chunk
              , RTRIM( LTRIM( SUBSTRING( s1.[Course-level Learning Objectives] , s2.Type2Start , Type2Length
                                       )
                            )
                     )AS Type2_chunk
              , RTRIM( LTRIM( SUBSTRING( s1.[Course-level Learning Objectives] , s2.Type3Start , Type3Length
                                       )
                            )
                     )AS Type3_chunk
           FROM s1 , s2
       ) , unpivot1
    AS ( SELECT [Prefix/Code]
              , Name
              , Credits
              , Description
              , Type_chunk
           FROM( 
                 SELECT [Prefix/Code]
                      , Name
                      , Credits
                      , Description
                      , Type1_chunk
                      , Type2_chunk
                      , Type3_chunk
                   FROM s3
               )p UNPIVOT( Type_chunk FOR Type_descrip IN( Type1_chunk
                                                         , Type2_chunk
                                                         , Type3_chunk
                                                         )
                                                         )AS unpvt
       )
    SELECT [Prefix/Code]
         , Name
         , Credits
         , Description
         --, Type_chunk
         , LEFT( u.Type_chunk , -2 + dbo.udf_NthIndex( u.Type_chunk , '[' , 1
                                                     )
               )AS [Learning Objectives]
         , RIGHT( u.Type_chunk , 1 + LEN( u.Type_chunk
                                        ) - dbo.udf_NthIndex( u.Type_chunk , '[' , 1
                                                            )
                )AS Type
      FROM unpivot1 u;