delegates Questions
3
Solved
Sorry, this is a mix of C# and VB.Net
I have a C# class with with 2 delegates:
public delegate string GetSettingDelegate(string key);
public event GetSettingDelegate GetSettingEvent;
public dele...
Pneumatology asked 23/5, 2011 at 22:56
6
Are delegates the same thing as callbacks? Or are they related somehow?
5
Solved
I am working on an app where I have created modules for each feature of the app. I have to switch from one Module UI Controller to another Module UI Controller.
I have UIController in a Module and...
Scandent asked 7/1, 2019 at 11:37
10
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How would you dynamically subscribe to a C# event so that given a Object instance and a String name containing the name of the event, you subscribe to that event and do something (write to the cons...
Willmert asked 5/9, 2008 at 13:17
3
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An open delegate is a delegate to an instance method without the target. To call it you supply the target as its first parameter. They are a clever way to optimize code that otherwise would use ref...
Ganja asked 3/11, 2010 at 9:51
4
Solved
I wanna change the number of the TextBox when The Mouse Scrolls. I have a Scroll TextBox But I Don't wanna use that. Is There any Event related to this?
Should I write an TextBox Event? If yes, How...
6
Solved
I have a class which has a delegate member.
I can set the delegate for each instantiated object of that class but has not found any way to save that object yet
2
Im getting the warning "Non-nullable event 'SomeEvent' must contain a non-null value when exiting constructor. Consider declaring the event as nullable."
Here's a very simplified version ...
Anticipant asked 22/10, 2021 at 12:1
5
Solved
I expect this to sound like an obvious question but, does the delegate return type have to match the return type of the method it is delegating too?
EG, like this:
public static void Save()
{
T...
2
To preface, this problem has been solved using a couple of different methods - I'll leave the stack overflow post that has the solution here text
The problem deals with detecting when the "del...
Seringa asked 14/7, 2023 at 5:27
15
Solved
Several Linq.Enumerable functions take an IEqualityComparer<T>. Is there a convenient wrapper class that adapts a delegate(T,T)=>bool to implement IEqualityComparer<T>? It's easy eno...
9
Solved
I have the following code:
Func<string, bool> comparer = delegate(string value) {
return value != "0";
};
However, the following does not compile:
var comparer = delegate(string value) {...
Bathurst asked 11/2, 2011 at 4:17
6
Solved
Is there any way to get a delegate to run on a specific thread?
Say I have:
CustomDelegate del = someObject.someFunction;
Thread dedicatedThread = ThreadList[x];
Can I have a consistent backgro...
Rockabilly asked 13/8, 2010 at 22:26
7
Solved
Why is a Func<> created from an Expression<Func<>> via .Compile() considerably slower than just using a Func<> declared directly ?
I just changed from using a Func<IInte...
Unideaed asked 18/11, 2010 at 3:27
7
Solved
I have been trying to learn a bit more about delegates and lambdas while working on a small cooking project that involves temperature conversion as well as some cooking measurement conversions such...
Beria asked 21/10, 2011 at 15:10
3
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I've implemented this short example to try to demonstrate a simple delegation pattern. My question is. Does this look like I've understood delegation right?
class Handler:
def __init__(self, pare...
Armful asked 4/9, 2010 at 18:47
11
Solved
I have a weird problem. I get this error:
-[FourSquareCheckInViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x7aecc0
2012-09-14 19:18:39.039 [5869:707] *...
Nonbeliever asked 14/9, 2012 at 19:45
22
Solved
I have to do some operation whenever UICollectionView has been loaded completely, i.e. at that time all the UICollectionView's datasource / layout methods should be called. How do I know that?? Is ...
Selenite asked 24/12, 2012 at 10:23
4
Solved
Take the below code:
private void anEvent(object sender, EventArgs e) {
//some code
}
What is the difference between the following ?
[object].[event] += anEvent;
//and
[object].[event] += ...
Dniren asked 15/2, 2009 at 10:55
12
Solved
This may be something common and trivial, but I seem to be having trouble finding a concrete answer. In C# there is a concept of delegates, which relates strongly to the idea of function pointers f...
Arielle asked 2/7, 2009 at 9:19
20
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I know how delegates work, and I know how I can use them.
But how do I create them?
Boding asked 9/3, 2009 at 16:6
8
Solved
weak references don't seem to work in Swift unless a protocol is declared as @objc, which I don't want in a pure Swift app.
This code gives a compile error (weak cannot be applied to non-class typ...
Marcos asked 5/6, 2014 at 17:16
9
Solved
I would like to create a method that takes an event as an argument and adds eventHandler to it to handle it properly. Like this:
I have two events:
public event EventHandler Click;
public event E...
Travesty asked 1/4, 2010 at 12:27
4
Solved
In my main class 'A' I have declared a function and delegate to call that function, I want to pass my delegate to another class 'B' but how will class B know what type the delegate is?
class A
pu...
4
Solved
I try to compile the following code in C#:
public static T FirstEffective(IEnumerable<T> list)
{
Predicate<T> pred = x => x != null;
return Enumerable.FirstOrDefault(list, pred);...
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