Starting SAP GUI using C#

[ptuga]

Hello,

I have been provided with this code previously on another ticket I have raised.

It works fine for VB.NET:

SapGuiAuto = CreateObject("Sapgui.ScriptingCtrl.1")
app = SapGuiAuto.GetScriptingEngine
app.HistoryEnabled = False
Dim connName = "......................................"
connection = app.OpenConnection(connName, True)
If connection.DisabledByServer = True Then
   Exit Sub
End If
session = connection.Children(0)
If session.Info.IsLowSpeedConnection = True Then
   Exit Sub
End If

For reference: https://answers.sap.com/questions/13346150/beginner-create-a-visual-studio-application-consol.html?c...

The idea now is to find a way to use C# to do the same task: If SAP GUI is not running, to start the GUI and login using a known connection.

I have added the line:

using Microsoft.VisualBasic;

And added the VisualBasic Reference to my app

I have also set my app to 32 bit (Platform target as x86).

I was able to do this:

SapGuiAuto = Microsoft.VisualBasic.Interaction.CreateObject("Sapgui.ScriptingCtrl.1");
app = InvokeMethod(SapGuiAuto, "GetScriptingEngine", new object[0]);
SetProperty(app, "HistoryEnabled", new object[1] { false });

From here I don't know how to manage to get the connection and session objects (among all the other lines in the VB.NET example).

Please support.

Thank you.

[ptuga]

Hello everyone,

After a few attempts and looking at the different ways of setting properties, getting the properties and calling the methods, I have managed to making it work.

My code below:

SapGuiAuto = Microsoft.VisualBasic.Interaction.CreateObject("Sapgui.ScriptingCtrl.1");
app = InvokeMethod(SapGuiAuto, "GetScriptingEngine");
SetProperty(app, "HistoryEnabled", new object[1] { false });

connection = InvokeMethod(app, "OpenConnection", new object[2] { " ... MY CONNECTION NAME ...", true });
if (GetProperty(connection, "DisabledByServer") == true)
{
   return;
}

session = GetProperty(connection, "Children", new object[1] { 0 });
object info = GetProperty(session, "Info");
if (GetProperty(info, "IsLowSpeedConnection") == true)
{
   return;
}

[ptuga]

The objects will need to be defined and released at the end:

object SapGuiAuto = null;
object app = null;
object connection = null;
object session = null;

FreeObject(session);
FreeObject(connection);
FreeObject(app);
FreeObject(SapGuiAuto);

[ptuga]

And methods will need to be defined:

static dynamic InvokeMethod(object obj, string methodName, object[] methodParams = null)
{
	return obj.GetType().InvokeMember(methodName, BindingFlags.InvokeMethod, null, obj, methodParams);
}

static dynamic GetProperty(object obj, string propertyName, object[] propertyParams = null)
{
	return obj.GetType().InvokeMember(propertyName, BindingFlags.GetProperty, null, obj, propertyParams);
}

static dynamic SetProperty(object obj, string propertyName, object[] propertyParams = null)
{
	return obj.GetType().InvokeMember(propertyName, BindingFlags.SetProperty, null, obj, propertyParams);
}

static void FreeObject(object obj)
{
	Marshal.ReleaseComObject(obj);
}

[ptuga]

When the code runs, SAP GUI opens and a connection is established.

When the code finishes, it closes the connection and SAP GUI if you have a console application.

If your app is a Windows form, the session stays open until the form is closed.

I hope it helps anyone trying to achieve the same goal.