Dump SSIS USER variable name and value in SQL Server table

Question

Purpose: Fetch all the user variables that are in the SSIS package and write the variable name and their values in a SQL Server 2008 table.

Answer 1

I can think of 2 ways of solving this issue right now .

1. Use the same script task to insert the values into the Database
2. using Foreach loop to enumerate the ssis package variables ( as you have asked )

Table Script for inserting the variable name and value is

CREATE TABLE [dbo].[SSISVariables]
(
[Name] [varchar](50) NULL,
[Value] [varchar](50) NULL
)

1.Use Script task and write the below code

[System.AddIn.AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
{
    private static string m_connectionString = @"Data Source=Server Name;
    Initial Catalog=Practice;Integrated Security=True";
   public void Main()
    {
       List<SSISVariable> _coll = new List<SSISVariable>();
        Microsoft.SqlServer.Dts.Runtime.Application app = new Microsoft.SqlServer.Dts.Runtime.Application();
        Package pkg = app.LoadPackage(PackageLocation,Null);
                   Variables pkgVars = pkg.Variables;

        foreach (Variable pkgVar in pkgVars)
        {
            if (pkgVar.Namespace.ToString() == "User")
            {
                _coll.Add(new SSISVariable ()
                {
                 Name =pkgVar.Name.ToString(),
                 Val =pkgVar .Value.ToString () 
                });
           }
        }
        InsertIntoTable(_coll);
        Dts.TaskResult = (int)ScriptResults.Success;
    }

    public void InsertIntoTable(List<SSISVariable> _collDetails)
    {  
       using (SqlConnection conn = new SqlConnection(m_connectionString))
        {
            conn.Open();
            foreach (var item in _collDetails )
            {
             SqlCommand command = new SqlCommand("Insert into SSISVariables values (@name,@value)", conn);
             command.Parameters.Add("@name", SqlDbType.VarChar).Value = item.Name ;

             command.Parameters.Add("@value", SqlDbType.VarChar).Value = item.Val ;
             command.ExecuteNonQuery();    
            }
        }
     }
  }

   public class SSISVariable
   {
    public string Name { get; set; }
    public string Val { get; set; }
   }

Explanation:In this ,i'm creating a class which has properties Name and Val . Retrieve the package variables and their value using your code and store them in a collection List<SSISVariable> .Then pass this collection to a method (InsertIntoTable) which simply inserts the value into the database by enumerating through the collection .

Note :

There is a performance issue with the above code ,as for every variable 
im hitting the database and inserting the value.You can use
[TVP][1]( SQL Server 2008)   or stored procedure which takes
 xml( sql server 2005) as input. 

2.Using ForEach Loop

Design

Step 1: create a Variable VariableCollection which is of type System.Object and another variable Item which is of type String to store the result from Foreach loop

Step 2: For the 1st script task .

VariableCollection is used to store the Variable name and its value

Step 3: Inside the script task Main Method write the following code

  public void Main()
   {
     ArrayList _coll = new ArrayList(); 

        Microsoft.SqlServer.Dts.Runtime.Application app = new Microsoft.SqlServer.Dts.Runtime.Application();
        Package pkg = app.LoadPackage(Your Package Location,null);

        Variables pkgVars = pkg.Variables;
        foreach (Variable pkgVar in pkgVars)
        {
            if (pkgVar.Namespace.ToString() == "User")
            {
                _coll.Add(string.Concat ( pkgVar.Name,',',pkgVar.Value ));
            }
        }
        Dts.Variables["User::VariableCollection"].Value = _coll;
        // TODO: Add your code here
        Dts.TaskResult = (int)ScriptResults.Success;
    }

Step 4: Drag a Foreach loop and in the expression use Foreach from Variable Enumerator

Step 5:Foreach loop enumerates the value and stores it in a variable User::Item

Step 6:Inside the foreach loop drag a script task and select the variable

readonly variables   User::Item 

step 7: Write the below code in the main method

   public void Main()
    {
      string name = string.Empty;
      string[] variableCollection;
      variableCollection = Dts.Variables["User::Item"].Value.ToString().Split(',');
      using (SqlConnection conn = new SqlConnection(m_connectionString))
        {
            conn.Open();
            SqlCommand command = new SqlCommand("Insert into SSISVariables values (@name,@value)", conn);
            command.Parameters.Add("@name", SqlDbType.VarChar).Value = variableCollection[0];

            command.Parameters.Add("@value", SqlDbType.VarChar).Value = variableCollection[1];

            command.ExecuteNonQuery();
        }
        // TODO: Add your code here
        Dts.TaskResult = (int)ScriptResults.Success;
    }

Explanation : In the Foreach loop ,i can only enumerate one variable .So the logic is, i need to somehow pass the variable name and its value into one variable .And for this ,i have concatenated name and value

 string.Concat ( pkgVar.Name,',',pkgVar.Value )

Script task in the foreach loop simply splits the variable and stores it into a array of string and then u can access the name and value using array index and store it in the database