readonly

What's the suggested "best practice" way to use Knockout's "attr" data binding with standalone attributes like "readonly" and "disabled" ? These attributes are special in that they are generally enabled by setting the attribute value to the attribute name (although many browsers work fine if you simply include the attribute names without any values in the HTML): <input type="text" readonly="readonly" disabled="disabled" value="foo" /> However, if you don't want these attributes to be applied, the general practice is to simply omit them altogether from the HTML (as opposed to doing something

Update 2011-Jan-06: Believe it or not, I went ahead and incorporated this interface into an open source library I've started, Tao.NET . I wrote a blog post explaining this library's IArray<T> interface, which not only addresses the issues I originally raised in this question (a year ago?!) but also provides a covariant indexed interface , something that's sorely lacking (in my opinion) in the BCL. Question (in short): I asked why .NET has IList<T> , which implements ICollection<T> and therefore provides methods to modify the list ( Add , Remove , etc.), but doesn't offer any in-between

Is there a way to make a model read-only in the django admin? but I mean the whole model. So, no adding, no deleting, no changing, just see the objects and the fields, everything as read-only? ModelAdmin provides the hook get_readonly_fields() - the following is untested, my idea being to determine all fields the way ModelAdmin does it, without running into a recursion with the readonly fields themselves: from django.contrib.admin.util import flatten_fieldsets class ReadOnlyAdmin(ModelAdmin): def get_readonly_fields(self, request, obj=None): if self.declared_fieldsets: fields = flatten

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. 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.TextBoxFor(model => model.userName, new { disabled = "disabled", @readonly = "readonly" }) </div> You can still

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't String.Empty a constant? ". This means that, for example, in C# we can't use string.Empty in the

What's the difference between the Enabled and the ReadOnly-properties of an asp:TextBox control? 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. Another behaviour is that readonly = 'true' controls will fire events like click , buton Enabled = False controls will not. Readonly will not "grayout" the textbox and will still submit the value on a postback. Think about it from the browser's point of view. For readonly the browser will

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. Jakub Narębski There is more than one possible way to do this. If your users each have a shell account (perhaps limited), and each of them accessing git repositories via their own account, you can use filesystem

Is there a simple way to create an immutable NumPy array? If one has to derive a class from ndarray to do this, what's the minimum set of methods that one has to override to achieve immutability? You can make a numpy array unwriteable: a = np.arange(10) a.flags.writeable = False a[0] = 1 # Gives: RuntimeError: array is not writeable Also see the discussion in this thread: http://mail.scipy.org/pipermail/numpy-discussion/2008-December/039274.html and the documentation: http://docs.scipy.org/doc/numpy/reference/generated/numpy.ndarray.flags.html 来源： https://stackoverflow.com/questions/5541324