dynamic

问题 I have a class, ReferenceObject, that I want Emitted into the dll I create. How do I do this without writing every method with Emit? I basically want this class added to the dll I generate. Here is the class: public class ReferenceObject { private readonly int value; public ReferenceObject(int pValue) { value = pValue; } public override string ToString() { return value.ToString(); } public int Value() { return value; } public int ID() { return value; } #region == Operator public static bool

问题 I am developing android application in which for validations, it displays messages with alert box. I wanted to add buttons dynamically according to certain conditions. I like ask how to do this? I searched on Google, but couldn't find any suitable solutions. Any Suggestions are helpful. Thanks. 回答1: You can use a DialogFragment to acheive it. Create your own dialog view and inflate it in the onCreateView() of the dialog fragment. 回答2: if you know the possible buttons that could be displayed:

问题 I want to allow the user to create "custom screens" dynamically by selecting from a existing set of fields at runtime i.e., everything should be done on App on the phone. For example - existing set of fields = {name, location, picture, age} . User A wants to create a new screen with fields name, location and age. and User B wants to have a screen with only name and picture. These screens should be persistent and should be able to save, query and edit information in a local database on the

问题 I have a table (id, Name, Surname, Address etc.). All the fields (except id) can be NULL. I want to make a form where I can find all the records that have at least a NULL field. I have made a query (with the query designer) and then I "linked" a continuous form to it. In the Detail part of the form I put a textbox ID (linked to the query) so I can have all the IDs that have at least a field NULL. So far so good, it works. I would like to inform the user, after the ID, which fields are blank.

问题 Im trying to make a function to run it later. In php 5.3.2-1 it works fine. But in 5.1.6 it doesn't. The code is: $func = function(){ echo "Hello!"; }; echo "Before Hello"; $func(); Does anyone knows how to emulate this in 5.1.6? Thanks. Eduardo 回答1: Anonymous functions are available since PHP 5.3. You cannot use them in older versions. Take a look at the docs. 回答2: $func = create_function('','echo "Hello!";'); echo "Before Hello"; $func(); to be able to "assign a function to a variable",

问题 The concrete classes ( BankAccount and CreditCard ) are not visible on controller. I'm stuck with this issue. I'm using the example from this site: http://weblogs.asp.net/manavi/archive/2010/12/28/inheritance-mapping-strategies-with-entity-framework-code-first-ctp5-part-2-table-per-type-tpt.aspx The view The CreateUser : If the CreditCard was selected it should be associated to the User class. The diagram The code UserController : [HttpPost] public ActionResult Create(User user)//The Watch

问题 The concrete classes ( BankAccount and CreditCard ) are not visible on controller. I'm stuck with this issue. I'm using the example from this site: http://weblogs.asp.net/manavi/archive/2010/12/28/inheritance-mapping-strategies-with-entity-framework-code-first-ctp5-part-2-table-per-type-tpt.aspx The view The CreateUser : If the CreditCard was selected it should be associated to the User class. The diagram The code UserController : [HttpPost] public ActionResult Create(User user)//The Watch

问题 I have the following code: public class MyClass: DynamicObject, INotifyPropertyChanged { Dictionary<string, object> properties = new Dictionary<string, object>(); public override bool TryGetMember(GetMemberBinder binder, out object result) { if (properties.ContainsKey(binder.Name)) { result = properties[binder.Name]; return true; } else { result = "Invalid Property!"; return false; } } public override bool TrySetMember(SetMemberBinder binder, object value) { properties[binder.Name] = value;

问题 I've encountered a strange anomaly while learning/tinkering with asp.net. I'm trying to show a partial view like this: @Html.Partial("_PartialView", new { Action = "Foo" }) When I'm trying to access Action with // Throws Microsoft.Csharp.RuntimeBinder.RuntimeBinderException string throwsException = Model.Action; a RuntimeBinderExceptionis with the message 'object' does not contain a definition for 'Action' is thrown. The strange thing is that this line works fine: // This line works fine

问题 I'm trying to download an image, and create an ImageView dynamically and add it to my layout, but it won't display the image. Here is my code: ImageView image = new ImageView(this); LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); image.setLayoutParams(vp); image.setScaleType(ImageView.ScaleType.CENTER_CROP); image.setMaxHeight(50); image.setMaxWidth(50); image.setImageDrawable(avatar); theLayout.addView(image); maybe I need to