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In chapter 6 we discussed a web part named FavoritesWebPart which allowed users to add the URLs to their favorite websites and have them remembered.
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The FavoritesWebPart discussed here is included in the sample project named PersonalizationInterfaces that can be found in the chapter 6 section of the resources website for this book.
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To allow the user to add hyperlinks, the page that hosted the FavoritesWebPart had a textbox and a button that allowed the user to submit hyperlink data to the web part. When the user pressed the button on the page, data was taken from the textbox and passed to a method named AddHyperlink that was exposed on the web part. Figure 7.1 shows a picture of the page in which you can see the textbox, the Add Hyperlink button, and the web part which displays the data for two existing hyperlinks. While the favorites web part is undoubtedly useful, it also has some drawbacks. For example, how do users remove hyperlinks when they no longer hold the esteemed status of favorite Another drawback is that the user can enter only a URL
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Figure 7.1 The FavoritesWebPart that we created in chapter 6 displays a listing of the users favorite hyperlinks.
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for the hyperlink; this would make it extremely difficult to read and understand links that contained large amounts of data appended to the URL. Finally, and probably the most limiting drawback, is that to be of any use at all, the web part relies upon the page to provide the controls and code that allows the user to enter the hyperlinks in the first place. Having a web part that relies upon functionality provided by the web page is not good because the web part is no longer portable and cannot be arbitrarily added to any page by a user.
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The relationship between any two objects is referred to as their coupling. Objects that are highly reliant upon one another are referred to as being tightly coupled while objects that are free-standing are referred to as loosely coupled. Wherever possible we want our web parts to be loosely coupled so that they are not dependant upon other objects and can therefore be used in a wider range of applications.
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There are many things that we can do to improve the FavoritesWebPart and in the process we ll also make it easier for users to work with. One option is to allow users to enter additional data about each hyperlink such as a display title and a description. The extra information can then be used to improve the appearance of the hyperlink when it is displayed in a web page. In the next section we ll take the FavoritesWebPart and make several improvements to it. First we ll give it a rich data type that will allow it to store the title, hyperlink, and a description. Then we ll really whip it into shape by creating a custom editor control to make it easy for users to work with the web part and add new favorites. 7.2.1 Improving the FavoritesWebPart As mentioned, we are looking for ways to improve the usability of our portal, and we ve started by taking a look at how users maintain and edit web parts within the portal. We re now going to take the FavoritesWebPart and make a number of improvements to it. Throughout the course of these improvements we ll learn some important lessons about how to work with web parts that have complex data for their properties, and we ll see how to work with the EditorZone by adding our own custom editor parts to it.
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