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How to load Data from Multiple Text / CSV Files to SQL Server Table with File Name by using Script Task in SSIS Package - SSIS Tutorial

Scenario: Download Script

You get tons of text or csv files in one of the Source Folder. You need to load all the files to SQL Server Table. All the flat files has the same number of columns. You would like to also load the file name with data to SQL Server Table. How would you do load file name with data to SQL server Table by using SSIS Package?

Here is our SQL Server Table

Create table dbo.Customer(
Id INT,
Name VARCHAR(100),
Dob Date,
FileName VARCHAR(100))

Sample files for this demo shown below

Solution:

This can be done by using built-in Tasks, Transformations and expressions in SSIS Package. I have written this post already, you can take a look if you like

How To Load Multiple Files ( .txt or .csv ) To a Table With File Names

But in this post we are going to learn how to use script task to handle this situation. We will load the data to table and then archive the files to archive folder after adding datetime to it.

Step 1: Create New SSIS Package and Variables

Open SSDT ( SQL Server Data Tools) and create new SSIS Package. After that go ahead and create variables so we can use them in configuration to pass values anytime our requirement change.

ArchiveFolder: Provide the folder path where you would like to move files after loading. Datetime part will be added to file name.

DestinationTable : Provide the Destination Table name with Schema as shown where you would like to load flat files( text files or csv files)

FileDelimiter : Provide the delimiter which is used in your txt or csv files.

FileExtension : Provide the Extension of files you would like to load from folder.

LogFolder : Provide the folder path where you would like to create log file in case of error in script task

SourceFolder: Provide the source folder path where text files or csv files are places for import process.

Create Variable in SSIS Package to Load and Archive flat files by using Script Task -SSIS tutorial

Step 2:

Click in Connection Manager Pane and then Create ADO.NET Connection by providing Server Name and database Name. After creating I have renamed it to DBConn.

Create ADO.NET Connection so we can use in Script Task to load the data to Destination Table

Step 3: Add Variables to Script Task to use from SSIS Package

Bring the Script Task on Control Flow Pane in SSIS Package and open by double clicking Check-box in front of variable to add to Script Task.

Add variables to Script Task so we can load multiple Text files or csv files to SQL Server Table in SSIS Package

Step 4: Add Script to Script task Editor in SSIS Package to import multiple CSV files or Text Files to SQL Server Table

Click Edit Button and it will open Script Task Editor.

Under #region Namespaces, I have added below code

using System.IO;
using System.Data.SqlClient;

Under public void Main() {

I have added below code.

            string datetime = DateTime.Now.ToString("yyyyMMddHHmmss");
            try
            {

                //Declare Variables
     string SourceFolderPath = Dts.Variables["User::SourceFolder"].Value.ToString();
     string FileExtension = Dts.Variables["User::FileExtension"].Value.ToString();
     string FileDelimiter = Dts.Variables["User::FileDelimiter"].Value.ToString();
     string TableName = Dts.Variables["User::DestinationTable"].Value.ToString();
     string ArchiveFolder = Dts.Variables["User::ArchiveFolder"].Value.ToString();
                //string ColumnList = "";

                //Reading file names one by one
    string SourceDirectory = SourceFolderPath;
    string[] fileEntries = Directory.GetFiles(SourceDirectory, "*" + FileExtension);
       foreach (string fileName in fileEntries)
                {

         SqlConnection myADONETConnection = new SqlConnection();
         myADONETConnection = (SqlConnection)
         (Dts.Connections["DBConn"].AcquireConnection(Dts.Transaction) as SqlConnection);

                    //Writing Data of File Into Table
                    int counter = 0;
                    string line;
                    //MessageBox.Show(fileName);

                    System.IO.StreamReader SourceFile =
                    new System.IO.StreamReader(fileName);
                    while ((line = SourceFile.ReadLine()) != null)
                    {
                        if (counter > 0)
                        {

                     string query = "Insert into " + TableName + " Values ('";
                     query += line.Replace(FileDelimiter, "','") + "','" + fileName + "')";
                            //MessageBox.Show(query.ToString());
                       SqlCommand myCommand1 = new SqlCommand(query, myADONETConnection);
                       myCommand1.ExecuteNonQuery();
                        }

                        counter++;
                    }

                    SourceFile.Close();
                    //move the file to archive folder after adding datetime to it
                    File.Move(fileName, ArchiveFolder + "\\" + (fileName.Replace(SourceFolderPath,"")).Replace(FileExtension,"") + "_" + datetime+FileExtension);
                    Dts.TaskResult = (int)ScriptResults.Success;
                }
            }
            catch (Exception exception)
            {
                // Create Log File for Errors
                using (StreamWriter sw = File.CreateText(Dts.Variables["User::LogFolder"].Value.ToString()
                    + "\\" + "ErrorLog_" + datetime + ".log"))
                {
                    sw.WriteLine(exception.ToString());
                    Dts.TaskResult = (int)ScriptResults.Failure;
                }

            }

Step 5: Save Script and Run SSIS Package

Save the script in Script Editor and execute your SSIS Package, It should load the files from Source folder to SQL Server table with file names and move the file to archive folder after loading them.

Here are records loaded by package in dbo.Customer table from my sample files.