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Setting the Textbox read only property to true using JavaScript

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问题 How do you set the Textbox read only property to true or false using JavaScript in ASP.NET? 回答1: You can try document.getElementById("textboxid").readOnly = true; 回答2: document.getElementById('textbox-id').readOnly=true should work 回答3: Try This :- set Read Only False ( Editable TextBox) document.getElementById("txtID").readOnly=false; set Read Only true(Not Editable ) var v1=document.getElementById("txtID"); v1.setAttribute("readOnly","true"); This can work on IE and Firefox also. 回答4: I

Can parameters be constant?

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I'm looking for the C# equivalent of Java's final . Does it exist? Does C# have anything like the following: public Foo(final int bar); In the above example, bar is a read only variable and cannot be changed by Foo() . Is there any way to do this in C#? For instance, maybe I have a long method that will be working with x , y , and z coordinates of some object (ints). I want to be absolutely certain that the function doesn't alter these values in any way, thereby corrupting the data. Thus, I would like to declare them readonly. public Foo(int x, int y, int z) { // do stuff x++; // oops. This

Spring - Transaction Readonly

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Just wanted your expert opinions on declarative transaction management for Spring. Here is my setup: DAO layer is plain old JDBC using Spring JdbcTemplate (No Hibernate etc) Service layer is POJO with declarative transactions as follows - save*, readonly = false, rollback for Throwable Things work fine with above setup. However when I say get*, readonly = true , I see errors in my log file saying Database connection cannot be marked as readonly . This happens for all get* methods in service layer. Now my questions are: A. Do I have to set get* as readonly? All my get* methods are pure read DB

How to detect a SQL Server database's read-only status using T-SQL?

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问题 I need to know how to interrogate a Microsoft SQL Server, to see if a given database has been set to Read-Only or not. Is that possible, using T-SQL? 回答1: The information is stored in sys.databases . SELECT name, is_read_only FROM sys.databases WHERE name = 'MyDBNAme' GO --returns 1 in is_read_only when database is set to read-only mode. 回答2: Querying sys.databases for checking a DB's Read-Only property will only give the right information if the database has been explicitly set to Read-Only

Assignment to readonly property in initializer list

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Can one tell me, why the heck does it compile? namespace ManagedConsoleSketchbook { public interface IMyInterface { int IntfProp { get; set; } } public class MyClass { private IMyInterface field = null; public IMyInterface Property { get { return field; } } } public class Program { public static void Method(MyClass @class) { Console.WriteLine(@class.Property.IntfProp.ToString()); } public static void Main(string[] args) { // ************ // *** Here *** // ************ // Assignment to read-only property? wth? Method(new MyClass { Property = { IntfProp = 5 }}); } } } This is a nested object

Is it wise to access read-only data from multiple threads simultaneously?

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I have an application that I'm trying to make multithreaded. Each thread will access a large chunk of read-only data. Is is okay if multiple threads access the data simultaneously? I know that if the data were not read-only, I would need to use mutexes or some other form of synchronization to prevent race-conditions. But I'm wondering if it's okay to read the data without regard to synchronization. The data in question will not be modified for the duration of all threads. The application will be running on Linux and Windows and is written in C++ if that makes any difference. If the data is

Is there a way to make readonly (not just private) automatic properties?

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问题 Automatic properties let me replace this code: private MyType myProperty; public MyType MyProperty { get { return myPropertyField; } } with this code: public MyType MyProperty { get; private set; } with a few changes here and there - but is there a way to replace this code: private readonly MyType myProperty; public MyType MyProperty { get { return myPropertyField; } } with something similar? 回答1: No, but this idea is being tracked on Connect. 回答2: Indeed, there is no way to do this at

How can a readonly static field be null?

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问题 So here's an excerpt from one of my classes: [ThreadStatic] readonly static private AccountManager _instance = new AccountManager(); private AccountManager() { } static public AccountManager Instance { get { return _instance; } } As you can see, it's a singleton-per-thread - i.e. the instance is marked with the ThreadStatic attribute. The instance is also instantiated as part of static construction. So that being the case, how is it possible that I'm getting a NullReferenceException in my ASP

Html.TextBox conditional attribute with ASP.NET MVC Preview 5

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问题 I have a strongly-typed MVC View Control which is responsible for the UI where users can create and edit Client items. I'd like them to be able to define the ClientId on creation, but not edit, and this to be reflected in the UI. To this end, I have the following line: <%= Html.TextBox("Client.ClientId", ViewData.Model.ClientId, new { @readonly = (ViewData.Model.ClientId != null && ViewData.Model.ClientId.Length > 0 ? "readonly" : "false") } ) %> It seems that no matter what value I give the

Setting a control to readonly using jquery 1.6 .prop()

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With the release of jQuery 1.6, the recommendation on SO has been to generally start using prop() where you used to use attr(). What happens when I want make an element readonly? $('.control').prop('readonly', 'readonly'); $('.control').prop('readonly', true); Neither of these seem to make the control readonly. Is making an element readonly the exception to the rule? The problem is that the property name is case-sensitive. Try: $('.control').prop('readOnly', true); Though really I don't know why this requires jQuery. This works just as well: document.getElementsByClassName("control")[0]