readonly

I'm trying to expose a read-only dictionary that holds objects with a read-only interface. Internally, the dictionary is write-able, and so are the objects within (see below example code). My problem is that IReadOnlyDictionary doesn't support covariant conversions because of the reason outlined in the question here . This means I can't just expose my internal dictionary as a read only one. So my question is, is there an efficient way to convert my internal dictionary to an IReadOnlyDictionary, or some other way to handle this? The options I can think of are: Hold two internal dictionaries and

As Most, I am familiar with the readonly attribute for text input , But while reading code from other websites (a nasty habit of mine ) I saw more than one implementation for this attribute: <input type="text" value="myvalue" class="class anotherclass" readonly > and <input type="text" value="myvalue" class="class anotherclass" readonly="readonly" > and I have even seen <input type="text" value="myvalue" class="class anotherclass" readonly="true" > .. And I believe I saw even more, but can not recall the exact syntax now.. So, which one is the correct one that I should use? Vucko From w3 :

When I want to make a value type read-only outside of my class I do this: public class myClassInt { private int m_i; public int i { get { return m_i; } } public myClassInt(int i) { m_i = i; } } What can I do to make a List<T> type readonly (so they can't add/remove elements to/from it) outside of my class? Now I just declare it public: public class myClassList { public List<int> li; public myClassList() { li = new List<int>(); li.Add(1); li.Add(2); li.Add(3); } } JP Alioto You can expose it AsReadOnly . That is, return a read-only IList<T> wrapper. For example ... public ReadOnlyCollection<int

How can I programatically remove the readonly attribute from a directory in C#? var di = new DirectoryInfo("SomeFolder"); di.Attributes &= ~FileAttributes.ReadOnly; Here's a good link to examples of modifying file attributes using c# http://www.csharp-examples.net/file-attributes/ based on their example, you can remove the Read Only attribute like this (I haven't tested this): File.SetAttributes(filePath, File.GetAttributes(filePath) & ~FileAttributes.ReadOnly); Using the -= assignment operator is dangerous for two reasons: 1) It works ONLY IF the ReadOnly attribute is set, thus a test is

I don't know when attribute should be private and if I should use property. I read recently that setters and getters are not pythonic and I should use property decorator. It's ok. But what if I have attribute, that mustn't be set from outside of class but can be read (read-only attribute). Should this attribute be private, and by private I mean with underscore, like that self._x ? If yes then how can I read it without using getter? Only method I know right now is to write @property def x(self): return self._x That way I can read attribute by obj.x but I can't set it obj.x = 1 so it's fine. But

I need to expose an Entity Framework Data Context to 3rd party plugins. The purpose is to allow these plugins to fetch data only and not to let them issue inserts, updates or deletes or any other database modification commands. Hence how can I make a data context or entity readonly. In addition to connecting with a read-only user, there are a few other things you can do to your DbContext. public class MyReadOnlyContext : DbContext { // Use ReadOnlyConnectionString from App/Web.config public MyContext() : base("Name=ReadOnlyConnectionString") { } // Don't expose Add(), Remove(), etc. public

Guys from http://jqueryvalidation.org/ just released version 1.13.1. Checking on their website i see this on the changelog: CORE: * Ignore readonly as well as disabled fields. (9f4ba10) This is the link: https://github.com/jzaefferer/jquery-validation/commit/9f4ba10ea79b4cf59225468d6ec29911f0e53a0a I use some bootstrap templates and one of them now uses that version. That brings me a problem, i use readonly attribute to prevent users typing dates manually, so their only option is to choose a date from the datepicker. With this change, the validation plugin ignores the readonly inputs marked as