The decision as to what happens when using what address is rather complex. It depends on the processor architecture, OS and sometimes “what some software does”. The processor may not have memory protection, or address zero may indeed be “used for something” (in x86 real-mode, that DOS runs in, address zero contains the vector table, … Read more
This is your problem: _cache.TryGetValue(“CountsStats”, out countStats) out will change the object that countStats is pointing to. If it’s found in the cache, then it will be the cached object. Great! If it isn’t, then it will be null. You need to create a new instance in this case. You should change your code to … Read more
On line 99 in your XML helper you only create a new item object if the element’s name is item. Then in endElement(…), you set the title if the name is title. So you encountered a title element which is not inside an item element, before creating the first item. You should probably add an … Read more
This doesn’t look right: [XmlArray(“Pages”)] [XmlArrayItem(“Page”, typeof(SiteSource))] <– should be typeof(Page)? public SortableBindingList<Page> Pages 1 solved XmlSerializer Giving a Null exception in c#
If the EditText has no contents, it will return a blank string, or a “” In order to return with 0, simply set up an if statement: EditText editText = (EditText) mParent.findViewById(Rid_something); String string = editText.getText().toString().trim(); if (string.equals(“”)) { return “0”; } else { return string; } This will return 0 if blank, or the … Read more
The fix ended up being simple, and even logical, in hindsight. The controls are dynamically added to the form, like so: formCustCatMaint.Controls.Add(coName) And so, replacing this line, in the loop: For Each cntrl As Control In Me.Controls …with this: For Each cntrl As Control In formCustCatMaint.Controls And this line, in the GetLabelTextForID() function: For Each … Read more
In my experience, DIV’s are not registered to the server like ASP controls are so calling them directly would produce bad results. When making changes to the controls, i.e. adding styles, make sure you tell ASP what kind of control you have. For example: HtmlGenericControl _fail = (HtmlGenericControl)Page.FindControl(“fail”); _fail.Style.Item(“visibility”) = “hidden”; Edit: The problem lies … Read more
In your example you can have TWO different causes for the NullReferenceException: – Value `user` is null; – `user.FirstName` is null. I assume you’ve checked already if user is not null, so lets skip that one. Now lets assume that user.FirstName is null, what happens then? The first condition string.IsNullOrWhiteSpace(user.FirstName) will result to true. Is … Read more
You are getting null object exception because you have not initialise SQLiteDatabase before do operation Just need to replace your method public void executeEventInsert(String name, String score){ //For write data to your database SQLiteDatabase db = this.getWritableDatabase(); String query=”INSERT INTO universityFinder(univName, score) VALUES(‘”+name+”‘,'”+score+”‘);”; db.execSQL(query); } and public ArrayList<HashMap<String,String>> executeSelectEvents(int input){ String query=”select * from “+TABLE_NAME+ … Read more
What is the cause? Bottom Line You are trying to use something that is null (or Nothing in VB.NET). This means you either set it to null, or you never set it to anything at all. Like anything else, null gets passed around. If it is null in method “A”, it could be that method … Read more