Check for Read Only before DocumentManager.open

[mordend]

I know this has been asked but its never been fully answered form what I can find.

Answer I have found:

Document newDWG =  DocumentManager.open(FilePath);

newDWG.IsReadOnly will return if the previous open resulted in a readonly file. That is fine but it forces you to fully open the drawing only to find out its open on the network someplace else.

The solution I need is closer to the how CAD itself performs this. Checking for read only and returning the Username and PC name of who has it open. I cannot find a solution to produce a similar result. Even if I have to load the full document is there  a way to return the current user and or PC name?

thanks

[SENL1362 · Accepted solution]

I would first check for the file readonly attribute and then look for the Autodesk Lock File, as shown below.

To be on the save site use a proper XML parsing for decoding the DWL2 contents.

       [CommandMethod("TestDwgInUse")]
        public void TestDwgInUse()
        {
            Document doc = AcadApp.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;


            string pathname = @"C:\Temp";
            string dwgName = "TestDrawing";

            try
            {
                string dwgPathname = Path.Combine(pathname, dwgName + ".dwg");
                string dwlPathname = Path.Combine(pathname, dwgName + ".dwl");
                string dwl2Pathname = Path.Combine(pathname, dwgName + ".dwl2"); //XML formatted

                if (!File.Exists(dwgPathname))
                    throw new System.Exception(string.Format("File not found: {0}", dwgPathname));
                var fileAttributes = File.GetAttributes(dwgPathname);
                if (fileAttributes == FileAttributes.ReadOnly)
                    throw new System.Exception(string.Format("File ReadOnly: {0}", dwgPathname));

                if (File.Exists(dwl2Pathname))
                {
                    ed.WriteMessage("\n {0}", Path.GetFileName(dwgPathname));

                    //Becareful: the file will be in use, so File.ReadXXX will not work
                    using (FileStream stream = File.Open(dwl2Pathname, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                    {
                        //Use a XML parser or do it the simple way
                        using (StreamReader reader = new StreamReader(stream))
                        {
                            while (!reader.EndOfStream)
                            {
                                    //<?xml version="1.0" encoding="UTF-8">
                                    //<whprops>
                                    //<username>TheUserName</username>
                                    //<machinename>ThePCName </machinename>
                                    //<fullname></fullname>
                                    //<datetime>TheDate</datetime>
                                    //</whprops>
                                var dwl2Line = reader.ReadLine();
                                var tmpDwl2Line = dwl2Line.Split(new char[] { '<', '>' });
                                if (tmpDwl2Line.Length > 4)
                                {
                                    switch (tmpDwl2Line[1].ToUpper())
                                    {
                                        case "USERNAME":
                                            ed.WriteMessage("\n\t Locked By: {0}", tmpDwl2Line[2]);
                                            break;
                                        case "MACHINENAME":
                                            ed.WriteMessage("\n\t Locked On: {0}", tmpDwl2Line[2]);
                                            break;
                                        case "DATETIME":
                                            ed.WriteMessage("\n\t Locked At: {0}", tmpDwl2Line[2]);
                                            break;
                                    }
                                }
                            }
                        }
                    }
                }
            }
            catch (System.Exception ex)
            {
                ed.WriteMessage(ex.Message);
            }
        }

[mordend]

o Man, not sure why I didnt think to check the lock file.

I'm going to blame it on yesterday being my last day before holidays.

thank you so much.