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Questions tagged [invoke]

Executes the specified delegate on the thread that owns the control's underlying window handle.

The Invoke method searches up the control's parent chain until it finds a control or form that has a window handle if the current control's underlying window handle does not exist yet. If no appropriate handle can be found, the Invoke method will throw an exception.

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How do I invoke a Java method when given the method name as a string?

If I have two variables: Object obj; String methodName = "getName"; Without knowing the class of obj, how can I call the method identified by methodName on it? The method being called has no parameters, and a String return value. It's a getter for…
brasskazoo
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Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on

I have a scenario. (Windows Forms, C#, .NET) There is a main form which hosts some user control. The user control does some heavy data operation, such that if I directly call the UserControl_Load method the UI become nonresponsive for the duration…
Prerak K
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What's the difference between Invoke() and BeginInvoke()

Just wondering what the difference between BeginInvoke() and Invoke() are? Mainly what each one would be used for. EDIT: What is the difference between creating a threading object and calling invoke on that and just calling BeginInvoke() on a…
Nathan W
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What could cause java.lang.reflect.InvocationTargetException?

Well, I've tried to understand and read what could cause it but I just can't get it: I have this somewhere in my code: try{ .. m.invoke(testObject); .. } catch(AssertionError e){ ... } catch(Exception e){ .. } Thing is that, when it tries…
user550413
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Reflection: How to Invoke Method with parameters

I am trying to invoke a method via reflection with parameters and I get: object does not match target type If I invoke a method without parameters, it works fine. Based on the following code if I call the method Test("TestNoParameters"), it works…
Ioannis
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Cross-thread operation not valid: Control 'textBox1' accessed from a thread other than the thread it was created on

I want to send temperature value from a microcontroller using UART to C# interface and Display temperature on Label.Content. Here is my microcontroller code: while(1) { key_scan(); // get value of temp if (Usart_Data_Ready()) { …
Fatima Zohra
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Difference Between Invoke and DynamicInvoke

What is the difference between Invoke and DynamicInvoke in delegates? Please give me some code example which explain difference between that two methods.
testCoder
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Javascript dynamically invoke object method from string

Can I dynamically call an object method having the method name as a string? I would imagine it like this: var FooClass = function() { this.smile = function() {}; } var method = "smile"; var foo = new FooClass(); // I want to run smile on the…
Mikulas Dite
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Invoke(Delegate)

Can anybody please explain this statement written on this link Invoke(Delegate): Executes the specified delegate on the thread that owns the control's underlying window handle. Can anybody explain what this means (especially the bold one) I am not…
user1903439
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Func() vs Func.Invoke()

I'm curious about the differences between calling a Func directly vs. using Invoke() on it. Is there a difference? Is the first syntactical sugar and calls Invoke() underneath anyway? public T DoWork(Func method) { return…
tris
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How to use Reflection to Invoke an Overloaded Method in .NET

Is there a way to Invoke an overloaded method using reflection in .NET (2.0). I have an application that dynamically instantiates classes that have been derived from a common base class. For compatibility purposes, this base class contains 2…
Wes P
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How to execute a method passed as parameter to function

I want to write my own function in JavaScript which takes a callback method as a parameter and executes it after the completion, I don't know how to invoke a method in my method which is passed as an argument. Like Reflection. example code function…
Muhammad Ummar
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How do I invoke a private static method using reflection (Java)?

I would like to invoke a private static method. I have its name. I've heard it can be done using Java reflection mechanism. How can I do it? EDIT: One problem I encountered when trying to invoke the method is how to specify the type of its argument.…
snakile
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How to call a method stored in a HashMap? (Java)

I have a list of commands (i, h, t, etc) that the user will be entering on a command line/terminal Java program. I would like to store a hash of command/method pairs: 'h', showHelp() 't', teleport() So that I can have code something like: HashMap…
cwhiii
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MethodInvoker vs Action for Control.BeginInvoke

Which is more correct and why? Control.BeginInvoke(new Action(DoSomething), null); private void DoSomething() { MessageBox.Show("What a great post"); } or Control.BeginInvoke((MethodInvoker) delegate { MessageBox.Show("What a great…
Mike_G
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