Add the new tab page on navigation pannel

[BMW]

My goal is to add the new tabpage on the navigation pannel. I searched the forum for creating customer navigation. I used the PDViewCS_2008 as my test project. I declared the CUSTOM_NAV in PDFViewForm.cs.  When the project run, I got the error, “system.NullReferenceException: Object reference not set to an instance of an object.\r\n   at PDFViewCS.PDFViewForm.OpenPDF(String filename)” on the code, bookmark_tree.BeginUpdate().

 

My questions:

1.  Do I miss anything that made me to have this error. If so, would you tell me what I miss.

2.  Would you tell me what should do to add a new tabpage on the navigation. I also need the book mark and layer panel as like the build-in pannel on the sample.

 

The following is the code snippet for on PDFViewForm.cs file  in PDViewCS_2008 project.

 

#if CUSTOM_NAV

                // Populates a custom bookmark tree control with bookmark nodes (if any).

               

                Bookmark root = _pdfdoc.GetFirstBookmark();

                if (root.IsValid())

                {

                    bookmark_tree.BeginUpdate();

                    BuildBookmarkTree(root, bookmark_tree.Nodes);

                    bookmark_tree.EndUpdate();

                }

                else

                {

                    // Optional: Uncomment the following line to hide the bookmark

                    // tab if the document does not containing bookmarks?:

                    // _pdfdoc_tab.Hide();

                }

 

Thanks in advance.

[Support]

 

You need to define CUSTOM_NAV on the project level.

Open PDFViewCS solution project. Click Project > Properties. Under Build > General > Conditional compilation symbols add CUSTOM_NAV (e.g. NET_1_1; CUSTOM_NAV).

 

Alternatively search all the places in the code and remove 'CUSTOM_NAV' blocks that surround the code.

 

You may need to clear some ambiguities in the code (e.g. rename Action to pdftron.PDF.Action) but that is it.