Using DTS For Reading Dynamic .CSV Files From A Folder
Sep 20, 2006
Hi All,
I have a challenge i am trying to overcome, hopefully soneone would have come across this issue before..
I am creating a DTS package that will be scheduled to run at a certain time everyday. A source folder exists that get a set of new files everyday.The DTS Package will then read each file and copy the data into a load table in my database the challenge is this:
I am trying to load files from a source folder into my load table, Within each file, the entires are in a specific format using pipes to seperate the data that goes into which column e.g
example of a file entry:
column1 | column2 | column3
data1 | data2 | data3
data1 | data2 | data3
data1 | data2 | data3
And now i am using DTS to specify the file format and map the cloumns as apprporiate to my table...all this is well and good, but my problem is each file has a different name as well as being timestamped, now how do i use DTS to specify the source folder, open each file sequentially and read (or more appropriate, copy the entries into my table, inserting new data from each file into my load table as well as overwriting old data in the load table from the files in the folder ?) is there a way in specifying your source folder in DTS rather than specifying the file in the Menu options (in the transformation data task properties )given, and or do i need to write a script for this(reading the file?)
can someone please give me a solution and how to approach this?
I have a folder which contains all the flat files which are used by all the packages(ex--flat file connection managers) in my project. If we want to change the name of the folder,have to change in every package( in all connection managers) manually.It looks hardcoding and timetaking.
Is there any way to change in one place(xml,file,variable) so that it should be affected in all the packages.
one more doubt is..
If we configure the flat file connection manager in package configurations,configuration file (ex-xml)will be created (we can make changes in that file regarding that connecion mgr only.)
But i want one configuration file (ex--xml) so that i should configure the details of all the connection managers used in all packages.
In the first step of my SSIS package I need to get files from FTP and dump it/them in a local directory, but it's more than that, the logic is like this: 1. If no file(s) found, stop executing and send email saying no file(s) found; 2. If file(s) found, then compare it/them with existing files in our archive folder; if file(s) already exist in archive folder, stop executing and send email saying file(s) already existed, if file(s) not in archive folder yet, then transfer it/them to the local directory for processing.
I know i have to use a script task to do this and i did some research and found examples for each of the above 2 steps and not both combined, so that's why I need some help here to get the logic incorporated right.
Thanks for the help in advance and i apologize for the long lines of code!
example for step 1: ----------------------------------------------------------------------------------------------------------
' Microsoft SQL Server Integration Services Script Task ' Write scripts using Microsoft Visual Basic ' The ScriptMain class is the entry point of the Script Task.
' The execution engine calls this method when the task executes. ' To access the object model, use the Dts object. Connections, variables, events, ' and logging features are available as static members of the Dts class. ' Before returning from this method, set the value of Dts.TaskResult to indicate success or failure. ' ' To open Code and Text Editor Help, press F1. ' To open Object Browser, press Ctrl+Alt+J.
Public Sub Main()
Dim cDataFileName As String Dim cFileType As String Dim cFileFlgVar As String WriteVariable("SCFileFlg", False) WriteVariable("OOFileFlg", False) WriteVariable("INFileFlg", False) WriteVariable("IAFileFlg", False) WriteVariable("RCFileFlg", False) cDataFileName = ReadVariable("DataFileName").ToString cFileType = Left(Right(cDataFileName, 4), 2) cFileFlgVar = cFileType.ToUpper + "FileFlg" WriteVariable(cFileFlgVar, True) Dts.TaskResult = Dts.Results.Success End Sub Private Sub WriteVariable(ByVal varName As String, ByVal varValue As Object) Try Dim vars As Variables Dts.VariableDispenser.LockForWrite(varName) Dts.VariableDispenser.GetVariables(vars) Try vars(varName).Value = varValue Catch ex As Exception Throw ex Finally vars.Unlock() End Try Catch ex As Exception Throw ex End Try End Sub Private Function ReadVariable(ByVal varName As String) As Object Dim result As Object Try Dim vars As Variables Dts.VariableDispenser.LockForRead(varName) Dts.VariableDispenser.GetVariables(vars) Try result = vars(varName).Value Catch ex As Exception Throw ex Finally vars.Unlock() End Try Catch ex As Exception Throw ex End Try Return result End Function End Class
example for step 2: -------------------------------------------------------------------------------------------------------
' Microsoft SQL Server Integration Services Script Task
' Write scripts using Microsoft Visual Basic
' The ScriptMain class is the entry point of the Script Task.
Imports System
Imports System.Data
Imports System.Math
Imports Microsoft.SqlServer.Dts.Runtime
Public Class ScriptMain
' The execution engine calls this method when the task executes.
' To access the object model, use the Dts object. Connections, variables, events,
' and logging features are available as static members of the Dts class.
' Before returning from this method, set the value of Dts.TaskResult to indicate success or failure.
'
' To open Code and Text Editor Help, press F1.
' To open Object Browser, press Ctrl+Alt+J.
Public Sub Main()
Try
'Create the connection to the ftp server
Dim cm As ConnectionManager = Dts.Connections.Add("FTP")
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If we want to change the name of the folder(or)move the folder(path may change),have to change in every package( in all connection managers) manually.It looks hardcoding and timetaking.
Is there any way to change in one place(xml,file,variable) so that it should be affected in all the packages.
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