reflection

问题 I'm trying to writing a generic method that will load a record of a specific type, with a specific ID. Here's one way that works: public abstract class LinqedTable<T> where T : LinqableTable { public static T Get(long ID) { DataContext context = LinqUtils.GetDataContext<T>(); var q = from obj in context.GetTable<T>() where obj.ID == ID select obj; return q.Single<T>(); } } public abstract class LinqableTable { public abstract long ID { get; set; } } You can ignore the call to LinqUtils

问题 I know about EventInfo.AddEventHandler(...) method which can be used to attach handler to an event. But what should be done if i can not even define proper signature of the event handler, as in, i don't even have reference to the event args expected by the handler? I will explain the problem with the proper code. // Scenario when I have everything available in my solution, Zero Reflection Scenario. internal class SendCommentsManager { public void Customize(IRFQWindowManager rfqWindowManager)

问题 Is there a way to use Reflect to access unexported fields in go 1.8? This no longer seems to work: https://stackoverflow.com/a/17982725/555493 Note that reflect.DeepEqual works just fine (that is, it can access unexported fields) but I can't make heads or tails of that function. Here's a go playarea that shows it in action: https://play.golang.org/p/vyEvay6eVG. The src code is below import ( "fmt" "reflect" ) type Foo struct { private string } func main() { x := Foo{"hello"} y := Foo{"goodbye

问题 In current version of Mathematica these keyboard shortcuts are quite handy Ctrl+K completes current command GraphPl -> press Ctrl+K -> GraphPlot Ctrl+Shift+K completes current command and adds argument placeholders which could be replaced with actual values with tab key GraphPl -> press Ctrl+Shift+K -> GraphPlot[{vi1->vj1,vi2->vj2,...}] However I couldn't find any keyboard option to show associated settings/options For instance Say If I need to plot a graph with different layouts, I know I

问题 When using reflection it is possible to obtain the call stack (apart from that it can be a crude approximation due to JIT optimizations) using System.Diagnostics.StackTrace and examine the StackFrame objects contained. How can I get a reference to the object (the this-pointer) on which a method in a stack frame is executing? I know I can get the MethodBase by calling GetMethod() on the stack frame object, but what I'm looking for is something along the lines of GetObject() (which'd naturally

问题 I'm doing a heavy bit of reflection in my current project, and I'm trying to provide a few helper methods just to keep everything tidy. I'd like to provide a pair of methods to determine if a type or instance implements IEnumerable – regardless of the type T . Here is what I have at the moment: public static bool IsEnumerable(this Type type) { return (type is IEnumerable); } public static bool IsEnumerable(this object obj) { return (obj as IEnumerable != null); } When I test them using Debug

问题 C#, .NET 3.5 I am trying to get all of the properties of an object that have BOTH a getter and a setter for the instance. The code I thought should work is PropertyInfo[] infos = source.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.SetProperty | BindingFlags.GetProperty); However, the results include a property that does not have a setter. To give you a simple idea of my inheritance structure that might be affecting this (though I don't know how): public

问题 Preamble So, this question has already been answered, but as it was my first question for this project, I'm going to continue to reference it in other questions I ask for this project. For anyone who came from another question, here is the basic idea: Create a web app that can make it much easier to create other web applications or websites. To do this, you would basically create a modular site with "widgets" and then combine them into the final display pages. Each widget would likely have

问题 I can get easily see what projects and dlls a single project references from within a Visual Studio .NET project. Is there any application or use of reflection that can build me a full dependency tree that I can use to plot a graphical chart of dependencies? 回答1: In addition to NDepend, you can also try this addin for Reflector for showing assembly dependency graph. 回答2: NDepend comes with an interactive dependency graph coupled with a dependency matrix. You can download and use the free

问题 I cannot find the way to convert from Expression<Func<T1,bool>> to Expression<Func<T2,bool>>. Since Im using a lot of reflection, in fact, what I really need is a method which takes a type parameter and performs the conversion. public object Convert(Expression<Func<T1,bool>> expr, Type t); T2 is derived from T1 public class T1 { int FamilyId {get; set;} } public class T2 : T1 { ... other properties } I am defining a filter expression on the base class Expression<Func<T1,bool>> filter = p => p