How to execute a method Once during Runtime on c#

c# reflection methods runtime

10,435

Solution 1

Solution 2

public class TestClass
{
static private bool _isExecutedFirst = false;

public void MethodABC()
{
if(!_isExecutedFirst)
_isExecutedFirst = true;
else
throw Exception("Method executed before");
/////your code

} 
}

Hope this help

10,435

Author by

Rosmarine Popcorn

Updated on June 04, 2022

Comments

Rosmarine Popcorn almost 2 years

Is there a possibility to prevent method execution more than once during Run-time of an Instance without using an external Attribute ?

I hope i was clear ! Bests
Matt Mitchell almost 13 years

You can't declare a variable as static within a method. Also the question asked for once per instance.
Matt Mitchell almost 13 years

How would that help exactly? How would a static constructor test when the method is run or prevent method subsequent method execution?
Naui Monclús almost 13 years

The method can be enclosed in a static ctor of the class & "The static constructor for a non-generic class executes at most once in a given application domain" copied verbatim from ECMA C# spec - en.csharp-online.net/ECMA-334%3A_17.11_Static_constructors
jimjim almost 13 years

it works by // Static constructor is called at most one time, before any // instance constructor is invoked or member is accessed. and a value can be set that is changed when the method is called. next time the method tries to execute first it checks the value.
Naui Monclús almost 13 years

shouldn't AExecuted be static ?
Jamiec almost 13 years

Love it. OP specifies "prevent method execution more than once during Run-time of an Instance" and then marks an answer talking about static constructor as the answer. You need to be a mindreader sometimes.
Orochi almost 13 years

duh... i thought he's asking for C++ one
Veeru almost 13 years

I didn't ask for these powers ;)
Matt Mitchell almost 13 years

@AB Kolan - no? He wants per instance guards.
Matt Mitchell almost 13 years

A static constructor would limit to one execution per class. The OP asked for one execution per instance.
Matt Mitchell almost 13 years

This is one run per class - the OP asked for one run per instance.