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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.

1794 questions
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WPF invoke a control

How can I invoke a control with parameters? I've googled this up, but nowhere to find! invoke ui thread This is the error i get: Additional information: Parameter count mismatch. And this happens when i do a simple check whether the text property…
Yustme
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C# Multithreading -- Invoke without a Control

I am only somewhat familiar with multi-threading in that I've read about it but have never used it in practice. I have a project that uses a third party library that shares the status of an input device by raising events. The problem is, the way…
colithium
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Python Invoke - Can't find any collection named 'tasks'!

I did the getting started on Python Invoke from invoke import task @task def build(): print("Building!") The expected output is $ invoke build Building! However, my output is $ invoke build Can't find any collection named 'tasks'! I have…
Asoul
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MethodInvoke delegate or lambda expression

What is the difference between the two? Invoke((MethodInvoker) delegate { checkedListBox1.Items.RemoveAt(i); checkedListBox1.Items.Insert(i, temp + validity); checkedListBox1.Update(); } ); vs Invoke((MethodInvoker) …
Jack
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what is invoking?

What is method invoke, control.invoke? What is invoking in general in programming examples : MethodInvoker getValues = new MethodInvoker(delegate() { checkbox1Checked = checkbox1.Checked; textBox6Text = textBox6.Text; textBox7Text =…
BOSS
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Will multiple Control.BeginInvoke/Invoke calls execute in order?

I need to know whether Control.BeginInvoke and Control.Invoke calls will execute in the order they are called. I have the following scenario: UI thread is blocked WCF thread calls Control.BeginInvoke WCF thread calls Control.Invoke (or possibly…
cornergraf
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Speeding up Reflection Invoke C#/.NET

There are plenty of posts on speeding up reflection invokes, examples here: Speeding up Reflection API with delegate in .NET/C# https://codeblog.jonskeet.uk/2008/08/09/making-reflection-fly-and-exploring-delegates/ and here: Example : Speeding up…
Rob
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C# How to invoke with more than one parameter

I use the code below to access the properties on my form,but today I'd like to write stuff to a ListView,which requires more parameters. public string TextValue { set { if (this.Memo.InvokeRequired) { …
Ivan Prodanov
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Parameter count mismatch with Invoke?

The code block below results in the error: TargetParameterCountException was unhandled by user code. Parameter count mismatch. public void AddListViewItem(string[] Data) { if (InvokeRequired) { Invoke(new…
sooprise
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Why exceptions are not propagated by WPF Dispatcher.Invoke?

Here's my hypothetical example. I have a very simple WPF window with a one Button. The Button.Click event has a handler that goes like this. Action doit = () => { Action error = () => { throw new InvalidOperationException("test"); }; try { …
jpbochi
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How do I dynamically invoke methods in Groovy?

At runtime I'm grabbing a list of method names on a class, and I want to invoke these methods. I understand how to get the first part done from here: http://docs.codehaus.org/display/GROOVY/JN3535-Reflection GroovyObject.methods.each{ println…
avgvstvs
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Invoke ToolStripMenuItem

I'm trying to figure out if there's a way to Invoke ToolStripMenuItem. For example,I am calling a web service(ASynchrously) when result is returned.i populate drop down items according to result,(In call back method) …
Zain Ali
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Run code on UI thread without control object present

I currently trying to write a component where some parts of it should run on the UI thread (explanation would be to long). So the easiest way would be to pass a control to it, and use InvokeRequired/Invoke on it. But I don't think that it is a good…
Martin Moser
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"Object does not match target type" when calling methods using string in C#

I'm trying to call a method using a string, but there a problem: void make_moviment(string mov,Vector3 new_mov){ GameObject past_panel = GameObject.Find(actual_level.ToString()); Type t =…
Bernardo Bacalhau
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How to access a field's value via reflection (Scala 2.8)

Consider the following code: class Foo(var name: String = "bar") Now i try to get the value and the correct type of it via reflection: val foo = new Foo val field = foo.getClass.getDeclaredField("name") field.setAccessible(true) //This is where it…
soc
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