How to Create CSV File for Each Excel Sheet from Excel Files in SSIS Package

Scenario: Script to Download

You are working as ETL Developer / SSIS developer. You got this requirement where you get single or multiple Excel files in Source or Input folder. Each File Can have single Sheet or Multiple Sheets.

You need to create CSV file for each of the excel sheet in Destination Folder. The csv file name should be ExcelFileName_SheetName.csv.

Here are sample files with multiple Sheet that I am going to use for this post.

How to create CSV File for each Excel Sheet in SSIS Package by using Script Task

Customer_TechBrothersIT1.xlsx has two sheets in our case with columns Id, name and dob.

Create CSV files dynamically from Excel Files and Sheets - Script Task C#

Customer_TechBrothersIT2.xlsx has two sheets with columns id and name.

How to create csv file for each of the Excel Sheet from Multiple Excel Files in SSIS Package

Solution:

We are going to use Script Task with C# as scripting language in our SSIS Package to preform this requirement.

Step 1:

Create three variables as shown below.

SourceFolderPath: This is the folder where your Excel files should exists.

DestinationFolderPath: This variable should hold the folder path where you want to create csv files

FileDelimited: You can provide comma(,) or Pipe( | ) or any other character you like to use as delimiter in your csv file. This will give us opportunity to change to any delimiter without changing the package. I have used comma in this post.

How to use variable in Script Task to Create CSV File for Excel Sheets Dynamically in SSIS

Step 2:

Get the Script Task from Toolbox and drag to Control Flow Pane. Open Script Task by double click and then map the variables as shown.

How to map variables in Script Task for Creating csv file from Excel Sheet dynamically in SSIS

Step 3:

Click on Edit Script Button in above snapshot and it will open Script Task Editor. Under

#region Namespaces

add using System.IO;

Then go to public void Main()

{

and paste below code

string SourceFolderPath=Dts.Variables["User::SourceFolderPath"].Value.ToString();
string DestinationFolderPath = Dts.Variables["User::DestinationFolderPath"].Value.ToString();
string FileDelimited = Dts.Variables["User::FileDelimited"].Value.ToString();
var directory = new DirectoryInfo(SourceFolderPath);
            FileInfo[] files = directory.GetFiles();

//Declare and initilize variables
string fileFullPath = "";

//Get one Book(Excel file at a time)
foreach (FileInfo file in files)
            {
string filename = "";
                    fileFullPath = SourceFolderPath+"\\"+file.Name;
                    filename = file.Name.Replace(".xlsx","");
                    MessageBox.Show(fileFullPath);

                //Create Excel Connection
                string ConStr;
                string HDR;
                HDR="YES";
                ConStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileFullPath + ";Extended Properties=\"Excel 12.0;HDR=" + HDR + ";IMEX=0\"";
                    OleDbConnection cnn = new OleDbConnection(ConStr);


//Get Sheet Name
                   cnn.Open();
                DataTable dtSheet = cnn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetname;
                sheetname="";
foreach (DataRow drSheet in dtSheet.Rows)
            {
if (drSheet["TABLE_NAME"].ToString().Contains("$"))
                {
                     sheetname=drSheet["TABLE_NAME"].ToString();
//Display Sheet Name , you can comment it out
// MessageBox.Show(sheetname);

//Load the DataTable with Sheet Data
                     OleDbCommand oconn = new OleDbCommand("select * from [" + sheetname + "]", cnn);
//cnn.Open();
                     OleDbDataAdapter adp = new OleDbDataAdapter(oconn);
                     DataTable dt = new DataTable();
                     adp.Fill(dt);

//drop $from sheet name
                     sheetname = sheetname.Replace("$", "");

//Create CSV File and load data to it from Sheet
                     StreamWriter sw = new StreamWriter(DestinationFolderPath+"\\"+filename+"_"+sheetname+".csv", false);
int ColumnCount = dt.Columns.Count;

// Write the Header Row to File
for (int i = 0; i < ColumnCount; i++)
                     {
                         sw.Write(dt.Columns[i]);
if (i < ColumnCount - 1)
                         {
                             sw.Write(FileDelimited);
                         }
                     }
                     sw.Write(sw.NewLine);

// Write All Rows to the File
foreach (DataRow dr in dt.Rows)
                     {
for (int i = 0; i < ColumnCount; i++)
                         {
if (!Convert.IsDBNull(dr[i]))
                             {
                                 sw.Write(dr[i].ToString());
                             }
if (i < ColumnCount - 1)
                             {
                                 sw.Write(FileDelimited);
                             }
                         }
                         sw.Write(sw.NewLine);
                     }
                     sw.Close();
                } 
            }

Step 4:

Save the script in Script Task Editor and then close the window. You are all good to run the SSIS Package and it should dynamically create csv file for each of the excel sheet on excel files.

I executed the Package and here are csv files which are created from 2 Excel files and four Sheets on those excel files.