Failure in running c# code SAS EG 7.1

[StoneCat]

Hello community,

i would like to automate the creation of a SAS 7.1 project and decided to use a C # program.

After I had inserted the SASEGScripting.dll as a reference, I was able to do a lot with the SAS EG 7.1.

However, I always get the error message when executing the following code section:

public static SAS.EG.Scripting.Application EGApp
{ get; private set; }

public static SAS.EG.Scripting.ISASEGProject EGProject
{ get; private set; }

EGProject = EGApp.Open(projectPath, password); //Error

If I want to open a project via the code, the following error message occurs:

System.TypeInitializationException: Der Typeninitialisierer für "LibGit2Sharp.Core.NativeMethods" hat eine Ausnahme verursacht. ---> System.DllNotFoundException: Die DLL "git2-e0902fb": Das angegebene Modul wurde nicht gefunden. (Ausnahme von HRESULT: 0x8007007E) kann nicht geladen werden.

   bei LibGit2Sharp.Core.NativeMethods.git_libgit2_init()
   bei LibGit2Sharp.Core.NativeMethods.LibraryLifetimeObject..ctor()
   bei LibGit2Sharp.Core.NativeMethods..cctor()
   --- End of inner exception stack trace ---
   bei LibGit2Sharp.Core.NativeMethods.git_repository_init_ext(RepositorySafeHandle& repository, FilePath path, GitRepositoryInitOptions options)
   bei LibGit2Sharp.Core.Proxy.git_repository_init_ext(FilePath workdirPath, FilePath gitdirPath, Boolean isBare)
   bei LibGit2Sharp.Repository.Init(String path, Boolean isBare)
   bei SAS.EG.ProjectElements.InternalGitRepository..ctor(ProjectCollection pc)
   bei SAS.EG.ProjectElements.ProjectCollection..ctor(IMetadataService metadataService)
   bei SAS.EG.ProjectElements.ProjectCollection..ctor()
   bei SAS.EG.Scripting.Project..ctor()
   bei SAS.EG.Scripting.Application.Open(String fileName, String password)

Many thanks for the support!

[AndreasMenrath]

Well, it looks like EG cannot load a required DLL -->

System.DllNotFoundException: Die DLL "git2-e0902fb"

I have the DLL file "git2-e0902fb.dll" in the root directory of Enterprise Guide. 

Just add that DLL to your application and it should work.

[ChrisHemedinger]

I agree with @AndreasMenrath -- adding that DLL to your app should do the trick.  This dependency was introduced in 7.11 with the addition of Program History (which relies on an internal git repository).

[StoneCat]

I have added the reference in the project, but I get the same error message.

I have put my entire SAS Enterprise Guide folder into the / bin / debug folder of my program, now it works.

Do you know which of the files the git2-e0902fb-reference needs, so I do not have to deliver the whole folder?

Thanks.

[ChrisHemedinger · Accepted solution]

You can use an Assembly Resolver class/event to load the DLLs from the EG install as needed.

Add a class like this:

    /// <summary>
    /// Class to help you use SAS Enterprise Guide classes from their installed location
    /// </summary>
    public class SEG71AssemblyResolver
    {
        #region internal members
        internal static string PathToEGuideInstall = @"C:\Program Files\SAS\EnterpriseGuide\7.1";
        #endregion

        /// <summary>
        /// Install the AssemblyResolver event listener and discover locations of installed assemblies
        /// </summary>
        public static void Install(string path)
        {
            PathToEGuideInstall = path;

            // install Assembly Resolver event
            AppDomain currentDomain = AppDomain.CurrentDomain;
            currentDomain.AssemblyResolve += new ResolveEventHandler(currentDomain_AssemblyResolve);
        }

        /// <summary>
        /// Resolve assemblies not found in the current directory
        /// </summary>
        /// <param name="sender">Sender of event</param>
        /// <param name="args">contains a Name property with the assembly name needed</param>
        /// <returns>Loaded assembly, loaded by this routine</returns>
        private static Assembly currentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            string[] name = args.Name.Split(',');
            string path = System.IO.Path.Combine(PathToEGuideInstall, name[0] + ".dll");
            try
            {
                Assembly foundAssembly = Assembly.LoadFile(path);
                return foundAssembly;
            }
            catch (System.IO.FileNotFoundException)
            {
                return null;
            }
        }
    }

Then "install" this handler in the Main() function for your app:

  SAS.EG.Automation.SEG71AssemblyResolver.Install(EGinstall);

Passing in the path where EG is installed on your system.  This class *should* direct the .NET runtime to load any assembly it needs from the installed app folder.