Advanced Search

Return to Snippet

Revision: 51023
at September 13, 2011 00:55 by Krummelz
Initial Code 
function setConfirmUnload(on) {
            window.onbeforeunload = (on) ? unloadMessage : null;
        }
        function unloadMessage() {
            return 'You have entered new data on this page.  If you navigate away from this page without first saving your data, the changes will be lost.';
        }
Initial URL 

                                

                                                            

                                    

                                        

                                        Initial Description
                                        

                                    

                                    
Easy to use in C# ASP.NET:
to prevent a user from losing data when navigating away from whatever page they are on, just add
  string setConfirmUnload = "setConfirmUnload(true);";
  ScriptManager.RegisterStartupScript(this, this.GetType(), "", setConfirmUnload, true);
to you code somewhere, or just call
  setConfirmUnload(true);
from the onClick or onClientClick even of a link.
To allow a link to navigate away, pass in false instead.

Might be handy on an ASP.NET master page.

                                

                                                            

                                    

                                        

                                        Initial Title
                                        

                                    

                                    
Javascript to warn the user that they will lose data if they go away from this page

                                

                                                            

                                    

                                        

                                        Initial Tags
                                        

                                    

                                    

                                

                                                            

                                    

                                        

                                        Initial Language
                                        

                                    

                                    
JavaScript