Why unable to edit ArcSDE from multiple computers on LAN using custom ArcGIS Engine application?

Question

I cannot edit an ArcSDE database from multiple computers on a LAN network using a custom ArcGIS Engine application, I have tried both versioned and non-versioned feature classes, but they cannot be edited from more than one computer.

Inside the custom ArcGIS Engine application, for every single operation (Create, Remove), I open and close an edit session.

Any advice or experiences are welcome as why I may be unable to edit an ArcSDE database from multiple computers on a LAN network using a custom ArcGIS Engine application?

I tried to edit the same feature classe from 2 computers in the same time , but when i closed the edit session in the second computer, it gimme this error Your edits could not be saved because the target version has been updated since you started editing. These edits have been merged into your edit session. Review the changes and save again.

i'm editing feature classes like in this example :

    IWorkspaceEdit workspaceEdit = (IWorkspaceEdit)DB_Access.get_obj().ws;
    workspaceEdit.StartEditing(true);
    workspaceEdit.StartEditOperation();

        IFeatureClass fc = DB_Access.get_obj().ws.OpenFeatureClass("points");

        IFeature f = fc.CreateFeature();

        f.set_Value(fc.Fields.FindField("name"), "name_of_point");

        f.Shape = geometry;
        f.Store();

        workspaceEdit.StopEditOperation();

        workspaceEdit.StopEditing(true);

Answer 1

This is a licensing issue. A standalone ArcEngine license does not support multi-user editing. According to ESRI's documentation, multi-user editing geodatabase functionality only exists for ArcGIS Server licensing.

Since you have tagged this question with ArcGIS Server, I am going to assume that you have an ArcGIS server license. What you need to do is ensure that both you and your users have the ArcGIS Geodatabase Update Extension installed. You need this to create a multi-user geodatabase and also to enable multi-user editing.

1. If you haven't yet verified that the geodatabase you are working with is actually a multi-user database, check this. If it isn't a MU Geodatabase follow this guide (essentially just create an empty multi-user geodatabase and import all your single-user geodatabase information into it).

2. Verify that all users have the necessary geodatabase update extension mentioned above installed on their computer.

Answer 2

Have you tried using IMultiuserWorkspaceEdit.

IWorkspaceEdit workspaceEdit = (IWorkspaceEdit)DB_Access.get_obj().ws;
IMultiuserWorkspaceEdit multiuserWSE = (IMultiuserWorkspaceEdit)workspaceEdit;
multiuserWSE.StartMultiuserEditing(esriMultiuserEditSessionMode.esriMESMVersioned);

workspaceEdit.StartEditOperation();

IFeatureClass fc = DB_Access.get_obj().ws.OpenFeatureClass("points");

IFeature f = fc.CreateFeature();

f.set_Value(fc.Fields.FindField("name"), "name_of_point");

f.Shape = geometry;
f.Store();

workspaceEdit.StopEditOperation();

workspaceEdit.StopEditing(true);