Estimated lesson time: 90 minutes in C#

Create Quick Response Code in C# Estimated lesson time: 90 minutes

Estimated lesson time: 90 minutes
Quick Response Code Generator In C#.NET
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Denso QR Bar Code Decoder In C#.NET
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What Are Web Parts
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Web Parts are components of predefined functionality that can be embedded in a webpage. They have a centralized framework, management structure, and customization model. These components of functionality can be added to and removed from pages by both site designers and individual users. They can even be moved around on a page to fit the individual needs of users. Figure 5-9 shows an example of a Web Part page. Notice that the individual Web Parts have client-side menus that enable users to control them.
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FigURE 5-9 Web Parts generate client-side menus to enable customization.
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Lesson 3: Using Web Parts
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ChAPTER 5
Painting ECC200 In C#
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You can also use a CatalogZone control to add a catalog to your Web Part page. A catalog allows users to add Web Parts to and remove them from the zones defined on your page. Figure 5-10 shows the same page in edit mode. Here users are given a list of Web Parts from which to choose. They can add these components to the defined zones on the page.
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FigURE 5-10 You can use a CatalogZone control to enable users to add Web Parts on demand, without
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writing any code.
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Web Part pages and sites can provide users with several customization options. This is great when you are developing bits of functionality that will be deployed to a wide audience. Some common Web Parts you might create include the following:
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A list of recent news articles relating to your organization A calendar showing upcoming events A list of links to related websites A search box Picture thumbnails from a photo gallery Site navigation controls A blog
ChAPTER 5
Input Validation and Site Navigation
News articles pulled from a Really Simple Syndication (RSS) feed Local weather information retrieved from a web service Stock market quotes and graphs
Any control can act as a Web Part, including standard controls and custom controls. Adding Web Parts to a page doesn t necessarily require writing any code, because you can do so entirely with the Visual Studio designer.
Note
sOURCEs FOR WEb PARTs
Several sites on the Internet offer free Web Parts that you can download and add to your site.
The WebParts Namespace
ASP.NET includes many Web Parts; there are 13 controls in the designer Toolbox alone. These controls and classes can be found inside the System.Web.UI.WebControls.WebParts namespace. Many of these classes are discussed in depth in later sections. The following list provides a highlevel overview of the most important WebParts classes.
The WebPartManager control is required on every page that includes Web Parts. It does not have a visual representation. Rather, it manages all the Web Part controls and their events on the specified page.
WebPartmanager CatalogPart The CatalogPart control provides the user interface (UI) for managing a group of Web Parts that can be added to a Web Part page. This group is typically sitewide (and not just specific to a certain page).
The PageCatalogPart control is similar to the CatalogPart control. However, PageCatalogPart only groups those Web Parts that are part of a specific page. If a user closes certain Web Parts on the page, he or she can use the PageCatalogPart control to return them to the page.
PageCatalogPart EditorPart The EditorPart control allows users to define customizations, such as the modification of property settings, for the specified Web Part.
The DeclarativeCatalogPart control allows you to declare Web Parts that should be available to add to a page or to the entire site.
DeclarativeCatalogPart WebPartZone The WebPartZone control is used to define an area on your page in which Web Parts can be hosted. EditorZone The EditorZone control provides an area on the page where EditorPart controls can exist. CatalogZone The CatalogZone control defines an area in which a CatalogPart control can exist on the page.
Lesson 3: Using Web Parts
ChAPTER 5
IMportaNt WEb PARTs DATAbAsE
The ASP.NET Web Parts require the ASP.NET personalization database. This allows the tracking of user customizations to specific Web Parts and Web Part pages. This database, ASPNETDB, will be installed for you by Visual Studio when you run your first Web Part page. By default, the database is a Microsoft SQL Server Express database. You can, however, upgrade this to work with various editions of Microsoft SQL Server.
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