I have a WebDataMenu located in a Master Page to be used in the complete application, in one complex child webform that contains a lot of control, everything works fine and menu stay working on top in the header, but I have another child webform that it is used just to open a window and display pdf files, the window is display like in the other case, other webform, the pdf file is shown BUT THE MENU BAR DISAPPEARS????
Hello Garciama,
Thank you for posting on our forums.
May I ask if you can confirm that the page you are referring to is a "WebForm With Master Page"? If the WebForm is "WebForm With Master Page", please ensure the MasterPageFile attribute in the Page Declaration is set appropriately. Alternatively, you're still encountering issues, please feel free to upload the application or sample which demonstrates the issue you're encountering, and I will be happy to review it for you.
To learn more about ASP.NET Master Pages, please review the following MSDN article:https://msdn.microsoft.com/en-us/library/wtxbf3hh(v=vs.140).aspx
Please let me know if you have any questions regarding this matter.