Asp.net manual event wireup

When AutoEventWireup is false , you must explicitly bind event handlers to events, as shown in the preceding example. In that case, the method names do not have to follow a pattern. The default value is true if AutoEventWireup is not specified in the Page directive. Visual Studio automatically includes the attribute when it creates code-behind files. For ASP.

For Visual Basic, Visual Studio sets the value to false because handlers are bound to events by using the Handles keyword, which is inserted automatically by Visual Studio when it generates an event handler.

If you set AutoEventWireup to true , you can omit or remove the Handles keyword. Do not set AutoEventWireup to true if performance is a key consideration. When automatic event wireup is enabled, ASP. NET must make between 15 and 30 tries to match events with methods.

If you set AutoEventWireup to true , make sure that you do not also manually attach page event handlers to events. If you do, handlers might be called more than one time.

As an alternative to binding events to handlers, you can override the On eventname methods of the page or of controls. Skip to main content. Using AutoEventWireup essentially comes down to the value of developer effort versus end-user performance. Auto-wire will save developers from one line of code per event, but at the cost of system performance due to the reflection that occurs to have the system wire the events rather than the developer.

For a small utility web site or a demo for a presentation, I can understand using auto-wire. However, being a performance guy, I want to extract every ounce of horsepower I can out of my web applications, so I will always opt for manual wiring; with it only costing me one line of code, I feel that it is a good habit to have. Remember Me. Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.

Jay Harris is Cpt. LoadTest a. Home Find the Passion in Your Craft ». Dev Basics: ASP. Filed under: ASP. Net Dev Basics. Manual Event Wireup Page events can also be wired manually. Balancing Effort with Performance Using AutoEventWireup essentially comes down to the value of developer effort versus end-user performance. Technorati Tags: ASP.

You can also override the virtual methods instead of wiring up to events. Jay Harris. Tags ASP. License This work is licensed under a Creative Commons Attribution 3. Disclaimer Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.

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