Invoke() vs. BeginInvoke(): When Should I Use Each Delegate Invocation Method?

The difference between understanding the difference between Invoke () and Begininvoke ()

Introduction

In programming, the entrusted method plays a vital role in asynchronous programming. and are the two most commonly used commission call methods. Although these two methods are performed by commissioned callbacks, their behavior and use scenarios are different.

Invoke () and Begininvoke () differences Invoke() BeginInvoke()

Synchronous and asynchronous execution:

• Simultaneously execute the commission callback on the call, that is, the calling thread is waiting for the recovery to complete.

  Asynchronous execution of commissioned callback on the thread pool thread, allowing the calling thread will continue to be executed immediately.

  • Invoke() thread security:
  • BeginInvoke()
  Ensure that the commission is executed on the UI thread so that it can safely operate the UI element.
The threads that are not guaranteed to be carried out. In Windows Forms applications, it is usually executed on the UI thread, but it may not be the case in other contexts.

• Control waiting:
  • Invoke()
  It can continue to be executed after the calling thread is waiting for the commission to be completed. If the callback code blocks the UI thread, this may lead to dead locks.
  • BeginInvoke() Allow the calling thread to continue execution immediately without waiting to be completed. This can improve the response speed, especially in UI -dense applications.

• When to use each method

  • In the following circumstances, Invoke():
  • BeginInvoke() You need to perform synchronous operations on the UI thread to ensure that the UI element is updated before the calling thread continues to execute.
  You need to ensure the security of the thread when operating the UI element in the commissioned callback.

In the following circumstances,

:

• You want to perform asynchronous operation without blocking the calling thread. Invoke()

  You can deal with any potential thread security problems when operating UI during the callback.
  Compared with the thread object
• Using Calling the commission is similar to the creation of a thread object, because both methods allow the asynchronous execution code. However, there are key differences:

  BeginInvoke()

  The thread object needs to be managed to be managed, including thread creation, synchronization and cleanup.
  • Simplify asynchronous execution through internal processing these details, making it easier to use.
  In short,
  and
provide different commission call methods,

provides synchronous execution and thread security, and

allows asynchronous execution and improves the response speed in UI applications.

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