Reverse engineering SSIS package using C#

Question

There is a requirement to extract source,destination and column names of source and destination. Why am I tr

Answer 1

SQL server provide assemblies to manipulate packages programmatically.

To do a reverse engineering (deserialize a dtsx package), You have to do this by looping over packages and read them programmatically, just follow this detailed link

• Reading DTS and SSIS packages programmatically

There is another way (harder way and not recommended) to achieve this , by reading dtsx as text file and parse the xml content. check my answer at the following question to get an example:

• Automate Version number Retrieval from .Dtsx files

Hint:

just open the package in visual studio. go to the package explorer Tab (near control flow and data flow tabs) you will find a treeview. it will leads you the way you have to search for the component you need

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Update 1 - C# Script @ 2019-07-08

If you are looking for a script that list all package objects you can use a similar script:

using System;
using DtsRuntime = Microsoft.SqlServer.Dts.Runtime;
using DtsWrapper = Microsoft.SqlServer.Dts.Pipeline.Wrapper;

public void Main()
{
    string pkgLocation;
    DtsRuntime.Package pkg;
    DtsRuntime.Application app;
    DtsRuntime. DTSExecResult pkgResults;

    pkgLocation =
      @"D:\Test\Package 1.dtsx";
    app = new DtsRuntime.Application();
    pkg = app.LoadPackage(pkgLocation, null);

    //List Executables (Tasks)
    foreach(DtsRuntime.Executable tsk in pkg.Executables)
    {


        DtsRuntime.TaskHost TH = (DtsRuntime.TaskHost)tsk;
        MessageBox.Show(TH.Name + "\t" + TH.HostType.ToString());


        //Data Flow Task components
        if (TH.InnerObject.ToString() == "System.__ComObject")
        {
            try
            {

                DtsWrapper.MainPipe m = (DtsWrapper.MainPipe)TH.InnerObject;


                DtsWrapper.IDTSComponentMetaDataCollection100 mdc = m.ComponentMetaDataCollection;


                foreach (DtsWrapper.IDTSComponentMetaData100 md in mdc)


                {

                    MessageBox.Show(TH.Name.ToString() + " - " + md.Name.ToString());


                }

            }
            catch {

            // If it is not a data flow task then continue foreach loop

            }



        }



    }

    //Event Handlers
    foreach(DtsRuntime.DtsEventHandler eh in pkg.EventHandlers)
    {

        MessageBox.Show(eh.Name + " - " + CM.HostType);

    }

    //Connection Manager

    foreach(DtsRuntime.ConnectionManager CM in pkg.Connections)
    {

        MessageBox.Show(CM.Name + " - " + CM.HostType);


    }


    //Parameters
    foreach (DtsRuntime.Parameter Param in pkg.Parameters)
    {

        MessageBox.Show(Param.Name + " - " + Param.DataType.ToString());


    }


    //Variables
    foreach (DtsRuntime.Variable Var in pkg.Variables)
    {

        MessageBox.Show(Var.Name + " - " + Var.DataType.ToString());


    }

    //Precedence Constraints
    foreach (DtsRuntime.PrecedenceConstraint PC in pkg.PrecedenceConstraints)
    {

        MessageBox.Show(PC.Name);


    }

}

References

• Loading and Running a Local Package Programmatically

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Update 2 - SSISPackageExplorer Project @ 2019-07-10

I started a small project called SSISPackageExplorer on Git-Hub which allow the user to read the package objects in a TreeView, It is very basic right now but i will try to improve it in a while:

• GitHub - SSISPackageExplorer

Answer 2

Some of the properties in dtsx Microsoft.SqlServer.Dts.Pipeline are not CLS-compliant.

• ColumnInformation Constructors

ColumnInformation Class 
Definition

Namespace:
Microsoft.SqlServer.Dts.Pipeline 
Assembly:
Microsoft.SqlServer.PipelineHost.dll
Important
This API is not CLS-compliant.
C++

Copy
public ref class ColumnInformation

otherwise try this.

Just open your dtsx package in notepad++. Find table name then do the same search on the property name in all packages( find ion all files). I think that even if you search for the column in dtsx opened in a text editor it will give you everything. It's manual but can be updated with Regex and c#. I never did it with regex. I just did notepad++ and one package once.