Update and Write Back DataTable in Object Variable Using Script Component

Question

Hi All..
I'm trying to update an Object Type Variable [ReadWrite] with a Data Flow Task Script Component. Variable is already holding a record set with Column(s) like, ID, Name, IsProcessed.
Now in my Data Flow Script Component, I'm trying to 1st) Fill a DataTable with my variables value then 2nd) Loop through each Input Rows in Data Flow Component and accordingly if there is a match of ID then updating IsProcessed Column in DataTable. 3rd &Finally,
Copy datatable back to Object Type Variable.
Below is the code used and just for your ref. I tried Printing content of whole DataTable after Update. This looks perfect but not sure why my variable is able to capture it.
using System;
using System.Data;
using System.Data.OleDb;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Text;
[Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute]
public class ScriptMain : UserComponent
DataTable dt = new DataTable();
OleDbDataAdapter adapter = new OleDbDataAdapter();
List<string> listriuid = new List<string>();
public override void PreExecute()
base.PreExecute();
public override void PostExecute()
base.PostExecute();
adapter.Fill(dt, this.Variables.varobjChildPackageLog);
dt.AcceptChanges();
foreach (DataRow row in dt.Rows)
if (listriuid.Contains(row["ID"].ToString()))
row["IsProcessed"] = "Y";
// Just to see the Final Data Table Output
//StringBuilder b = new StringBuilder();
//foreach (System.Data.DataRow r in dt.Rows)
// foreach (DataColumn c in dt.Columns)
// b.Append(c.ColumnName.ToString() + ":" + r[c.ColumnName].ToString());
//MessageBox.Show(b.ToString());
this.Variables.varobjChildPackageLog = dt;
dt.Dispose();
adapter.Dispose();
public override void RIUIDInput_ProcessInputRow(RIUIDInputBuffer Row)
try
listriuid.Add(Row.ID.ToString());
catch (Exception ex)
MessageBox.Show(ex.Message.ToString());
Regards, Avik M.

Answer 1

why do you need to do this in script task.
This is just a matter of using lookup task while you retrive data from source itself to find the matches and use a derived column transform to check and set appropriate value for IsProcessed column. The object variable itself is not required and you dont
even require a looping statement either!
If both source and lookup tables are in same server then you can just wrap them inside source sql query itself to do matching and retrieve the value for IsProcessed within select statement itself in OLEDB Source inside data flow.
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