How to update only one field using Entity Framework?
Here’s the table Users UserId UserName Password EmailAddress and the code.. public void ChangePassword(int userId, string password){ //code to update the password.. } 16 Answers 16
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How to empty input field with jQuery
I am in a mobile app and I use an input field in order user submit a number. When I go back and return to the page that input field present the latest number input displayed at the input field. Is there any way to clear the field every time the page load? $(‘#shares’).keyup(function(){ payment … Read more
jQuery – Detect value change on hidden input field
I have a hidden text field whose value gets updated via an AJAX response. <input type=”hidden” value=”” name=”userid” id=”useid” /> When this value changes, I would like to fire an AJAX request. Can anyone advise on how to detect the change? I have the following code, but do not know how to look for the … Read more
Public Fields versus Automatic Properties
We’re often told we should protect encapsulation by making getter and setter methods (properties in C#) for class fields, instead of exposing the fields to the outside world. But there are many times when a field is just there to hold a value and doesn’t require any computation to get or set. For these we … Read more
Add new field to every document in a MongoDB collection
How can I add a new field to every document in an existent collection? I know how to update an existing document’s field but not how to add a new field to every document in a collection. How can I do this in the mongo shell? 7 Answers 7
In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
In a Django form, how do I make a field read-only (or disabled)? When the form is being used to create a new entry, all fields should be enabled – but when the record is in update mode some fields need to be read-only. For example, when creating a new Item model, all fields must … Read more
How to read the value of a private field from a different class in Java?
I have a poorly designed class in a 3rd-party JAR and I need to access one of its private fields. For example, why should I need to choose private field is it necessary? class IWasDesignedPoorly { private Hashtable stuffIWant; } IWasDesignedPoorly obj = …; How can I use reflection to get the value of stuffIWant? … Read more
What is the difference between a field and a property?
In C#, what makes a field different from a property, and when should a field be used instead of a property? 3 33
Why does Java have transient fields?
Why does Java have transient fields? 1 15 The transient keyword in Java is used to indicate that a field should not be part of the serialization (which means saved, like to a file) process. From the Java Language Specification, Java SE 7 Edition, Section 8.3.1.3. transient Fields: Variables may be marked transient to indicate … Read more
