readonly

Changed behavior of string.Empty (or System.String::Empty) in .NET 4.5

由 岁酱吖の 提交于 2019-11-26 22:44:50
问题 Short version: The C# code typeof(string).GetField("Empty").SetValue(null, "Hello world!"); Console.WriteLine(string.Empty); when compiled and run, gives output "Hello world!" under .NET version 4.0 and earlier, but gives "" under .NET 4.5 and .NET 4.5.1. How can a write to a field be ignored like that, or, who resets this field? Longer version: I have never really understood why the string.Empty field (also known as [mscorlib]System.String::Empty ) is not const (aka. literal ), see "Why isn

How to make a git repository read-only?

由 不打扰是莪最后的温柔 提交于 2019-11-26 22:42:31
问题 I have some git repositories accessed remotely through SSH and I want to make some of them read-only to prevent more pushes. Some people have remotes pointing to these repositories. These bare repositories were initialised --shared=group , so is setting file permissions to 660 for all files good enough to still allow SSH access, but disallow writes? Or is there an easier way? Cheers. 回答1: There is more than one possible way to do this. If your users each have a shell account (perhaps limited)

Java / Hibernate - Write operations are not allowed in read-only mode

由 北城余情 提交于 2019-11-26 22:34:50
I've been having an annoying exception a lot lately, and after some research on Google and this forum I still haven't found an answer that could solve my problem. Here's the thing - sometimes, I get the following error when trying to update or create a new object with hibernate: org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition. at org.springframework.orm.hibernate3.HibernateTemplate

WCF: Exposing readonly DataMember properties without set?

由 假装没事ソ 提交于 2019-11-26 22:13:42
问题 I have a server side class which I make available on the client side through a [DataContract]. This class has a readonly field which I'd like to make available through a property. However, I'm unable to do so because it doesn't seem that I'm allowed to add a [DataMember] property without having both get and set. So - is there a way to have a [DataMember] property without setter? [DataContract] class SomeClass { private readonly int _id; public SomeClass() { .. } [DataMember] public int Id {

ReadOnly field in Xpage not submitted

由 谁都会走 提交于 2019-11-26 22:11:40
问题 I have a field in my Xpage that I want to be readOnly and submitted to the database upon Save. This field gets a value from a Ajax call Setting the property ReadOnly to true creates a <span> instead of a readonly field. Setting the property " Show disabled control for readonly " creates a input text field with the property readonly=readonly. <input type="text" class="xspInputFieldEditBox" readonly="readonly" name="view:_id1:_id2:_id3:_id28:callbackFieldControlSet:InstrumentShort" id="view:

MVC3 EditorFor readOnly

由 时光怂恿深爱的人放手 提交于 2019-11-26 20:06:02
问题 I want to make readOnly with EditorFor in edit page. I tried to put readonly and disabled as: <div class="editor-field"> @Html.EditorFor(model => model.userName, new { disabled = "disabled", @readonly = "readonly" }) </div> However, it does not work. How can I make to disable edit this field? Thank you. 回答1: The EditorFor html helper does not have overloads that take HTML attributes. In this case, you need to use something more specific like TextBoxFor: <div class="editor-field"> @Html

How to implement a read only property

由 你说的曾经没有我的故事 提交于 2019-11-26 20:02:09
I need to implement a read only property on my type. Moreover the value of this property is going to be set in the constructor and it is not going to be changed (I am writing a class that exposes custom routed UI commands for WPF but it does not matter). I see two ways to do it: class MyClass { public readonly object MyProperty = new object(); } class MyClass { private readonly object my_property = new object(); public object MyProperty { get { return my_property; } } } With all these FxCop errors saying that I should not have public member variables, it seems that the second one is the right

asp:TextBox ReadOnly=true or Enabled=false?

由 依然范特西╮ 提交于 2019-11-26 19:40:05
问题 What's the difference between the Enabled and the ReadOnly-properties of an asp:TextBox control? 回答1: If a control is disabled it cannot be edited and its content is excluded when the form is submitted. If a control is readonly it cannot be edited, but its content (if any) is still included with the submission. 回答2: Another behaviour is that readonly = 'true' controls will fire events like click , buton Enabled = False controls will not. 回答3: Readonly will not "grayout" the textbox and will

How is read-only memory implemented in C?

由 烂漫一生 提交于 2019-11-26 19:03:00
问题 I heard that in C, if I do char *s = "hello world". the "hello world" is actually stored in read-only memory. I am not so clear about read-only memory. What is the explanation? Is that like a flag to the compiler that tells the compiler to do not write into that section? 回答1: That's not a feature of the C language but a feature of the compiler/linker and the operating system working together. When you compile such code the following happens: The compiler will put the string into a read-only

Connection to a Microsoft SQL Database via VBA (ADODB) with the lowest risk to harm the database

由 一曲冷凌霜 提交于 2019-11-26 18:34:10
问题 im currently looking for a way to connect to a Microsoft SQL Server Database via VBA (ADODB) with the focus on a minimal risk in harming, block and change the structure of the database. Therefor the access is readonly. My attemp is the following: Set DBConn = New ADODB.Connection Set TmpRecset = New Recordset DBConn.ConnectionString = pConnStr DBConn.Open On Error GoTo TermConnection With TmpRecset .ActiveConnection = DBConn .Source = pQuery .LockType = adLockReadOnly .CursorType =
订阅 readonly