exception

问题 I'm getting an object expected error in a javascript file. In this case does it mean that the jQuery files aren't included properly? The line that is causing the error is... $(function () { The error in the browser is... Message: Object expected Line: 6 Char: 1 Code: 0 回答1: It's possible - if the files weren't included, then the $ variable would indeed not be an object where one was expected. "Object expected" errors usually mean that you have a variable that is null / undefined and then try

问题 My app makes an outbound connection to a server using a specific source port (in anticipation of firewall problems - a hardened system will probably require ports to be specified ahead of time). My problem is that my app makes the connection initially. However, if the connection ever breaks it will try again but the socket will get a BindException saying "address in use". This is not the case, as shown by netstat -pant. It shows that the the source port / remote socket pair does not exist (i

问题 In a method, I want to be able to insert a value into a div which is part of the html document I choose to parse. public void AddToDiv(string div) { //Code to read the html document and look for the div //(name specified as the parameter of this method). } Question is, I could specify a div called "abc" but the html document may not have this div. Fair enough, but what is the difference between me saying: try { //Method logic to parse document for the div } catch(ArgumentException ex) { // (I

问题 I have an exception I can't handle properly in Xamarin.Forms due to a missing member in the WebExceptionStatus enumeration, namely the NameResolutionFailure member. Does anyone know how I can properly handle the exception in this specific case? 回答1: When looking at a previous version of the WebExceptionStatus enumeration, the NameResolutionFailure member is not supported in a PCL. What you can do to handle this issue is as follows: case (System.Net.WebExceptionStatus)1: // your code Or: catch

问题 I hope someone can help me out with this. I can't reproduce this error but am receiving a huge amount of crash reports from it. Below is the stack trace and relevant code. I thought adding "cursor.close();" would solve the problem but it did not. Can anyone figure out what is going on? Line 187 is mDbAdapter.close(); java.lang.RuntimeException: Unable to start activity ComponentInfo{com.companionfree.WLThemeViewer/com.companionfree.WLThemeViewer.Viewer}: android.database.sqlite

问题 from django.core.exceptions import FieldError #This is a method of a class def _order_item_list(self, item_list, order_items_by, previous_order_by): if order_items_by == previous_order_by: order_items_by = '-' + order_items_by try: result = item_list.order_by(order_items_by) except FieldError: result = item_list return result, order_items_by Now when I order by valid fields following the generated link,everything works perfect. When I edit a link and add some dummy fieldnames for ordering, it

问题 I have a shared library with class: // HPP: class WorldSettings { private: static std::unordered_map<std::string, int> mIntegerStorage; static std::unordered_map<std::string, float> mFloatStorage; static std::unordered_map<std::string, std::string> mStringStorage; public: template <typename T> static T &Get(const std::string &key); template <typename T> static T &Set(const std::string &key, T value); }; // CPP: #define DoReturn(MapName, Key, Type) { \ assert( MapName.find(Key) != MapName.end(

问题 i am facing a problem while making an application of Blackberry that i have upto 7 threds call, of which each downloads an audio from the Server and it works fine but when i start my application twice then an uncaught exception has been occurred that "TOO MANY THREADS ERROR EXCEPTION", So, let me know that how i can solve this problem. 回答1: i think instead of starting 7 threads use single thread. 1. create a TaskWorker class public class TaskWorker implements Runnable { private boolean quit =

问题 using (SqlConnection con = new SqlConnection()) { try { con.Open(); } catch (Exception ex) { MessageBox.Show(ex.Message); } } This works fine. But I want to know can we handle exception without using try catch like some thing if else ? or is it mendetory to use try catch 回答1: There is no other mechanism to handle an exception other than try catch. It sounds like you want something like if(connection.DidAnErrorOccur) but that doesn't exist. 回答2: Only way is to check for all the conditions that

问题 I'm trying to write code that will load an image from a resource, and then crop it. This code works when I do all, or part, of it in XAML. I want to switch from all-XAML to all-code, so I can reuse this more than one place, with different Uris. But when I try to do the same thing in code, I get a DirectoryNotFoundException, because suddenly it starts trying to look for a folder on disk, instead of loading the image from the resource. If I load the BitmapImage in XAML, and then create a