Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports Microsoft.SqlServer.Dts.Runtime
Imports System.IO

<WebService(Namespace:="http://dtsue/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Public Class LaunchSSISPackageService
  Inherits System.Web.Services.WebService

  ' LaunchPackage Method Parameters:
  ' 1. sourceType: file, sql, dts
  ' 2. sourceLocation: file system folder, (none), logical folder
  ' 3. packageName: for file system, ".dtsx" extension is appended

  <WebMethod()> _
  Public Function LaunchPackage( _
    ByVal sourceType As String, _
    ByVal sourceLocation As String, _
    ByVal packageName As String) As Integer 'DTSExecResult

    Dim packagePath As String
    Dim myPackage As Package
    Dim integrationServices As New Application

    ' Combine path and file name.
    packagePath = Path.Combine(sourceLocation, packageName)

    Select Case sourceType
      Case "file"
        ' Package is stored as a file.
        ' Add extension if not present.
        If String.IsNullOrEmpty(Path.GetExtension(packagePath)) Then
          packagePath = String.Concat(packagePath, ".dtsx")
        End If
        If File.Exists(packagePath) Then
          myPackage = integrationServices.LoadPackage(packagePath, Nothing)
        Else
          Throw New ApplicationException( _
            "Invalid file location: " & packagePath)
        End If
      Case "sql"
        ' Package is stored in MSDB.
        ' Combine logical path and package name.
        If integrationServices.ExistsOnSqlServer(packagePath, ".", String.Empty, String.Empty) Then
          myPackage = integrationServices.LoadFromSqlServer( _
            packageName, "(local)", String.Empty, String.Empty, Nothing)
        Else
          Throw New ApplicationException( _
            "Invalid package name or location: " & packagePath)
        End If
      Case "dts"
        ' Package is managed by SSIS Package Store.
        ' Default logical paths are File System and MSDB.
        If integrationServices.ExistsOnDtsServer(packagePath, ".") Then
          myPackage = integrationServices.LoadFromDtsServer(packagePath, "localhost", Nothing)
        Else
          Throw New ApplicationException( _
            "Invalid package name or location: " & packagePath)
        End If
      Case Else
        Throw New ApplicationException( _
          "Invalid sourceType argument: valid values are 'file', 'sql', and 'dts'.")
    End Select

    Return myPackage.Execute()

  End Function

End Class

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using Microsoft.SqlServer.Dts.Runtime;
using System.IO;

[WebService(Namespace = "http://dtsue/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class LaunchSSISPackageServiceCS : System.Web.Services.WebService
{
  public LaunchSSISPackageServiceCS()
  {
    }

  // LaunchPackage Method Parameters:
  // 1. sourceType: file, sql, dts
  // 2. sourceLocation: file system folder, (none), logical folder
  // 3. packageName: for file system, ".dtsx" extension is appended

  [WebMethod]
  public int LaunchPackage(string sourceType, string sourceLocation, string packageName)
  { 

    string packagePath;
    Package myPackage;
    Application integrationServices = new Application();

    // Combine path and file name.
    packagePath = Path.Combine(sourceLocation, packageName);

    switch(sourceType)
    {
      case "file":
        // Package is stored as a file.
        // Add extension if not present.
        if (String.IsNullOrEmpty(Path.GetExtension(packagePath)))
        {
          packagePath = String.Concat(packagePath, ".dtsx");
        }
        if (File.Exists(packagePath))
        {
          myPackage = integrationServices.LoadPackage(packagePath, null);
        }
        else
        {
          throw new ApplicationException("Invalid file location: "+packagePath);
        }
        break;
      case "sql":
        // Package is stored in MSDB.
        // Combine logical path and package name.
        if (integrationServices.ExistsOnSqlServer(packagePath, ".", String.Empty, String.Empty))
        {
          myPackage = integrationServices.LoadFromSqlServer(packageName, "(local)", String.Empty, String.Empty, null);
        }
        else
        {
          throw new ApplicationException("Invalid package name or location: "+packagePath);
        }
        break;
      case "dts":
        // Package is managed by SSIS Package Store.
        // Default logical paths are File System and MSDB.
        if (integrationServices.ExistsOnDtsServer(packagePath, "."))
        {
          myPackage = integrationServices.LoadFromDtsServer(packagePath, "localhost", null);
        }
        else
        {
          throw new ApplicationException("Invalid package name or location: "+packagePath);
        }
        break;
      default:
        throw new ApplicationException("Invalid sourceType argument: valid values are 'file', 'sql', and 'dts'.");
    }

    return (Int32)myPackage.Execute();

  }

}

Module LaunchSSISPackageTest

  Sub Main()

    Dim launchPackageService As New LaunchSSISPackageService.LaunchSSISPackageService
    Dim packageResult As Integer

    Try
      packageResult = launchPackageService.LaunchPackage("sql", String.Empty, "SimpleTestPackage")
    Catch ex As Exception
      ' The type of exception returned by a Web service is:
      '  System.Web.Services.Protocols.SoapException
      Console.WriteLine("The following exception occurred: " & ex.Message)
    End Try

    Console.WriteLine(CType(packageResult, PackageExecutionResult).ToString)
    Console.ReadKey()

  End Sub

  Private Enum PackageExecutionResult
    PackageSucceeded
    PackageFailed
    PackageCompleted
    PackageWasCancelled
  End Enum

End Module

using System;

namespace LaunchSSISPackageSvcTestCS
{
  class Program
  {
    static void Main(string[] args)
    {
      LaunchSSISPackageServiceCS.LaunchSSISPackageServiceCS launchPackageService = new LaunchSSISPackageServiceCS.LaunchSSISPackageServiceCS();
      int packageResult = 0;

      try
      {
        packageResult = launchPackageService.LaunchPackage("sql", String.Empty, "SimpleTestPackage");
      }
      catch (Exception ex)
      {
        // The type of exception returned by a Web service is:
        //  System.Web.Services.Protocols.SoapException
        Console.WriteLine("The following exception occurred: " + ex.Message);
      }

      Console.WriteLine(((PackageExecutionResult)packageResult).ToString());
      Console.ReadKey();

    }

    private enum PackageExecutionResult
    {
      PackageSucceeded,
      PackageFailed,
      PackageCompleted,
      PackageWasCancelled
    };

  }
}