CODEWITHSUNDEEP
c#.netmultithreading
Claudio Cayo Castagnetti
Claudio Cayo Castagnetti

Reputation: 166

Change parameters value in a method during its execution in a thread

I would like to know if there is a way to dynamically change the parameters passed to a method when it running in a thread.

For example:

trdColCycl thread = new Thread (() => this.ColorsCycling (true));
trdColCycl.Start();

or

trdColCycl thread = new Thread (new ParameterizedThreadStart (this.ColorsCycling));
trdColCycl.Start(true);

and then I want to pass as a parameter to the thread running the value false ... is it possible? (in this example I would like to dynamically change the parameter value to exit from a loop inside the thread without using global variables)

Thanks for your help.

Upvotes: 1

Views: 1557

Answers (1)

Nolonar
Nolonar

Reputation: 6122

You could create a shared variable meant for communicating between two threads

class ArgumentObject
{
    public bool isOk;
}

// later
thread1Argument = new ArgumentObject() { isOk = true };
TrdColCycl thread = new Thread (() => this.ColorsCycling (thread1Argument));
trdColCycl.Start();

// much later
thread1Argument.isOk = false;

Edit:

Alternatively, you could pass the bool as reference instead:

bool isOk = true;
TrdColCycl thread = new Thread (() => this.ColorsCycling (ref isOk));
trdColCycl.Start();

// later
isOk = false;

In both cases, you'll have to modify the signature of your method:

// original
void ColorsCycling(bool isOk)
// should be
void ColorsCycling(ArgumentObject argument) // for option 1
// or
void ColorsCycling(ref bool isOk) // for option 2

Upvotes: 2

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