Javascript dynamically invoke object method from string
if the name of the property is stored in a variable, use [] foo[method]();
invoke
Difference Between Invoke and DynamicInvoke
When you have a delegate instance, you might know the exact type, or you might just know that it is a Delegate. If you know the exact type, you can use Invoke, which is very fast – everything is already pre-validated. For example: Func<int,int> twice = x => x * 2; int i = 3; … Read more
Cross-thread operation not valid: Control ‘textBox1’ accessed from a thread other than the thread it was created on [duplicate]
The data received in your serialPort1_DataReceived method is coming from another thread context than the UI thread, and that’s the reason you see this error. To remedy this, you will have to use a dispatcher as descibed in the MSDN article: How to: Make Thread-Safe Calls to Windows Forms Controls So instead of setting the … Read more
Reflection: How to Invoke Method with parameters
Change “methodInfo” to “classInstance”, just like in the call with the null parameter array. result = methodInfo.Invoke(classInstance, parametersArray);
What could cause java.lang.reflect.InvocationTargetException?
You’ve added an extra level of abstraction by calling the method with reflection. The reflection layer wraps any exception in an InvocationTargetException, which lets you tell the difference between an exception actually caused by a failure in the reflection call (maybe your argument list wasn’t valid, for example) and a failure within the method called. … Read more
What’s the difference between Invoke() and BeginInvoke()
Do you mean Delegate.Invoke/BeginInvoke or Control.Invoke/BeginInvoke? Delegate.Invoke: Executes synchronously, on the same thread. Delegate.BeginInvoke: Executes asynchronously, on a threadpool thread. Control.Invoke: Executes on the UI thread, but calling thread waits for completion before continuing. Control.BeginInvoke: Executes on the UI thread, and calling thread doesn’t wait for completion. Tim’s answer mentions when you might want to … Read more
Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on
As per Prerak K’s update comment (since deleted): I guess I have not presented the question properly. Situation is this: I want to load data into a global variable based on the value of a control. I don’t want to change the value of a control from the child thread. I’m not going to do … Read more
How do I invoke a Java method when given the method name as a string?
Coding from the hip, it would be something like: java.lang.reflect.Method method; try { method = obj.getClass().getMethod(methodName, param1.class, param2.class, ..); } catch (SecurityException e) { … } catch (NoSuchMethodException e) { … } The parameters identify the very specific method you need (if there are several overloaded available, if the method has no arguments, only give … Read more