What is the correct readonly attribute syntax for input text elements?

HTML5 spec: http://www.w3.org/TR/html5/forms.html#attr-input-readonly : The readonly attribute is a boolean attribute http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes : The presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value. If the attribute is present, its value must either be the empty string or a value that is an … Read more

MVC3 EditorFor readOnly

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 use EditorFor, but you will need to have a TextBoxFor in a custom … Read more

OneWayToSource binding from readonly property in XAML

Some research results for OneWayToSource… Option # 1. // Control definition public partial class FlagThingy : UserControl { public static readonly DependencyProperty IsModifiedProperty = DependencyProperty.Register(“IsModified”, typeof(bool), typeof(FlagThingy), new PropertyMetadata()); } <controls:FlagThingy x:Name=”_flagThingy” /> // Binding Code Binding binding = new Binding(); binding.Path = new PropertyPath(“FlagIsModified”); binding.ElementName = “container”; binding.Mode = BindingMode.OneWayToSource; _flagThingy.SetBinding(FlagThingy.IsModifiedProperty, binding); Option # … Read more

Can parameters be constant?

Unfortunately you cannot do this in C#. The const keyword can only be used for local variables and fields. The readonly keyword can only be used on fields. NOTE: The Java language also supports having final parameters to a method. This functionality is non-existent in C#. from http://www.25hoursaday.com/CsharpVsJava.html EDIT (2019/08/13): I’m throwing this in for … Read more

Immutable numpy array?

You can make a numpy array unwriteable: a = np.arange(10) a.flags.writeable = False a[0] = 1 # Gives: ValueError: assignment destination is read-only 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

Readonly models in Django admin interface?

The admin is for editing, not just viewing (you won’t find a “view” permission). In order to achieve what you want you’ll have to forbid adding, deleting, and make all fields readonly: class MyAdmin(ModelAdmin): def has_add_permission(self, request, obj=None): return False def has_delete_permission(self, request, obj=None): return False (if you forbid changing you won’t even get to … Read more

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