c# print barcode zebra printer Web Page and Server Control Events in .NET framework

Generation Quick Response Code in .NET framework Web Page and Server Control Events

Web Page and Server Control Events
QR Code ISO/IEC18004 Creation In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
www.OnBarcode.com
Barcode Generator In VS .NET
Using Barcode creator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
www.OnBarcode.com
All server controls have methods and events that execute during their life cycles, as their pages are being created and destroyed. Because the Web page derives from the Control class, it also has methods and events that execute as it is being created and destroyed. Table 2-1 contains an ordered list of the methods that execute and the events that take place when a page is requested. This table also contains the method names that correspond to the event. This list is specifically focused on ViewState and its availability during the control s life cycle.
Creating Denso QR Bar Code In Visual C#
Using Barcode creation for .NET framework Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
www.OnBarcode.com
Painting QR Code In .NET
Using Barcode generation for .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
www.OnBarcode.com
Table 2-1
Drawing Denso QR Bar Code In Visual Basic .NET
Using Barcode maker for VS .NET Control to generate, create QR Code image in .NET framework applications.
www.OnBarcode.com
Bar Code Encoder In .NET Framework
Using Barcode generation for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
Web Page/Server Control Life Cycle Methods and Events
Painting Barcode In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
Making PDF-417 2d Barcode In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
Method (Event) 1. OnInit (Init)
Create Matrix 2D Barcode In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Matrix 2D Barcode image in ASP.NET applications.
www.OnBarcode.com
UCC-128 Encoder In VS .NET
Using Barcode creator for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
www.OnBarcode.com
Description Initializes each child control of the current
Bar Code Printer In VS .NET
Using Barcode maker for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
Intelligent Mail Encoder In .NET
Using Barcode encoder for ASP.NET Control to generate, create USPS Intelligent Mail image in ASP.NET applications.
www.OnBarcode.com
control.
Making GS1 - 13 In Java
Using Barcode drawer for Android Control to generate, create EAN / UCC - 13 image in Android applications.
www.OnBarcode.com
Scanning UPC-A Supplement 5 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
2
GS1 128 Maker In Java
Using Barcode generation for Android Control to generate, create EAN 128 image in Android applications.
www.OnBarcode.com
Paint UPC-A Supplement 2 In None
Using Barcode generation for Font Control to generate, create UPC Code image in Font applications.
www.OnBarcode.com
Adding and Configuring Server Controls
Universal Product Code Version A Drawer In Java
Using Barcode printer for Eclipse BIRT Control to generate, create UPC-A Supplement 2 image in BIRT reports applications.
www.OnBarcode.com
Encode Barcode In Objective-C
Using Barcode printer for iPad Control to generate, create barcode image in iPad applications.
www.OnBarcode.com
Table 2-1
Scan UPCA In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Bar Code Decoder In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Web Page/Server Control Life Cycle Methods and Events
Method (Event) 2. LoadControlState
Description Loads the ControlState of the control. To use this method, the control must call the Page.RegisterRequiresControlState method in the OnInit method of the control. Loads the ViewState of the control. Is defined on interface IPostBackDataHandler. Controls that implement this interface use this method to retrieve the incoming form data and update the control s properties accordingly. Allows actions that are common to every request to be placed here. Note that the con trol is stable at this time; it has been initialized and its state has been reconstructed. Is defined on the interface IPostBackDataHandler. Controls that implement this inter face use this event to raise change events in response to the Postback data changing between the current Postback and the previ ous Postback. For example, if a TextBox has a TextChanged event and AutoPostback is turned off, clicking a button causes the TextChanged event to execute in this stage before handling the click event of the button, which is raised in the next stage. Handles the client-side event that caused the Postback to occur.
3. LoadViewState 4. LoadPostData
5. Load (OnLoad)
6. RaisePostDataChangedEvent
7. RaisePostbackEvent
Lesson 1: Using a Server Control
Table 2-1
Web Page/Server Control Life Cycle Methods and Events
Method (Event) 8. PreRender (OnPreRender)
Description Allows last-minute changes to the control. This event takes place after all regular Postback events have taken place. This event takes place before saving ViewState, so any changes made here are saved. Saves the current control state to ViewState. After this stage, any changes to the control state are lost. To use this method, the control must call the Page.RegisterRequiresControlState method in the OnInit method of the control. Saves the current data state of the control to ViewState. After this stage, any changes to the control data are lost. Generates the client-side HTML, Dynamic Hypertext Markup Language (DHTML), and script that are necessary to properly display this control at the browser. In this stage, any changes to the control are not persisted into ViewState. Accepts cleanup code. Releases any unmanaged resources in this stage. Unmanaged resources are resources that are not handled by the .NET common language runtime, such as file handles and database connections. Accepts cleanup code. Releases any managed resources in this stage. Managed resources are resources that are handled by the runtime, such as instances of classes created by the .NET common language runtime.
9. SaveControlState
10. SaveViewState
11. Render
12. Dispose
13. UnLoad
2
Adding and Configuring Server Controls
Creating Event Handlers
The Web page and its server controls have a default event. For example, the Web page s default event is Load event, and the button s default event is the Click event. In the Microsoft Visual Studio 2005 design time environment, you can add an event han dler method for the default event by simply double-clicking the design surface of the object. An event handler is created in the code-behind file. For example, if you doubleclick on the Web page (don t double-click a server control), a Page_Load event handler method is created in the code-behind page, and you can simply add your custom code into this method. The VB.NET and C# Web page designers differ when it comes to creating event han dlers for other events, including PostBack events.
Copyright © OnBarcode.com . All rights reserved.