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Generation qrcode in .net C# Lesson 3: Deploying Websites

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Figure 11-11. The Product Dimensions and Weight tab contains the parameters used for shipping calculation. Click the Product Images tab (see Figure 11-12) to upload a product image and thumbnail of the product if desired. VirtueMart will automatically generate a thumbnail from the main image if you haven t created one already. The selected images will not be uploaded into the system until you click the Save button.
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If you re a salesperson, your column headings might be Bene t, Feature, and Demonstration:
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The Simple XML Web service example is certainly interesting technically, but perhaps less satisfying in other respects. What might you want to do in the real world with an XML Web service One possibility is to allow the sharing of content between content providers and syndication partners. As I ve mentioned, I do some work for the Golf Society of the U.S. In addition to the Internet content that s displayed on their own Web page, they also have a syndication arm that allows syndication partners to link their sites to the Golf Society site. This means that the Golf Society site includes dozens of virtual directories, each with the look and feel of a different syndication partner. Until now, there s been no other good way to share content. Fortunately, XML Web services offer an alternative.
Disconnect the local cabling between the two computers for this exercise so you can see that the connection between the computers is occurring over the dial-up line.
The XmlReader Class The XmlReader class defines methods that enable you to pull data from an XML source and to skip unwanted nodes. Bear in mind that each and every element in an XML stream is considered a node, meaning that node is a rather generic concept that applies to subtree roots as well as to attributes, processing instructions, entities, comments, and plain text. The XmlReader class includes methods for reading XML content from an entire text file, returning the depth of the current XML node's subtree, and determining whether the contents of a given element is empty. You can also fairly easily read and navigate attributes and skip over elements and their contents. Valuable information such as the name and the contents of the current node is also returned via ad hoc properties. Base Properties of XML Readers Table 2-1 lists the public properties exposed by the XmlReader class. Notice that the values these properties contain depend on the actual reader class you are using in your code. The description of each property refers to the property's intended goal, but this description might not entirely reflect the actual role of the property in a derived reader class. Table 2-1: Public Properties of the XmlReader Class Property Description AttributeCount Gets the number of attributes on the current node. BaseURI CanResolveEntity Depth EOF HasAttributes HasValue IsDefault Gets the base URI of the current node. Gets a value indicating whether the reader can resolve entities. Gets the depth of the current node in the XML document. Indicates whether the reader has reached the end of the stream. Indicates whether the current node has any attributes. Indicates whether the current node can have a value. Indicates whether the current node is an attribute that originated from the default value defined in the document type definition (DTD) or schema. Indicates whether the current node is an empty element with no attributes or value. Indexer property that returns the value of the specified attribute. Gets the name of the current node with any prefix removed. Gets the fully qualified name of the current node. Gets the namespace URI of the current node. Applies to Element and Attribute nodes only. Gets the name table object associated with the reader. (More on name table objects later.) Gets the type of the current node. 22
A merge join is a join algorithm that requires both inputs to be sorted based on the join column(s). If an input is already sorted in an index (for example, a clustered index or, even better, a covering nonclustered index), the plan can perform an index order scan. In such a case, the merge join can be pretty ef cient even with large table sizes. If an input is not already sorted, the optimizer may decide to apply a sort operation. This typically happens when the input is small because sorting a large number of rows can be quite expensive. A merge join can be applied either as a one-to-many join or as a many-to-many join. When the optimizer can be certain of the uniqueness of the join column(s) in one of the sides, it can utilize a one-to-many merge join. With a one-to-many join, SQL Server scans both sides only once in an ordered fashion and merges the rows while scanning both inputs. It scans the rst row from both sides. As long as the end of the inputs is not reached, it checks whether the rows match. If they do, it returns a result row and reads another row in the many side. If they don t, it reads the next row from the side with the lower value. For example, in a join between T1 that has the values x, y, z in the join column and T2 with the values x, x, y, y, y, y, z, z, z, the merge join reads T1(x), T2(x, x, y), T1(y), T2(y, y, y, z), T1(z), T2(z, z, <end>), T1(<end>). Things become more complicated and expensive when you have a many-to-many join, where the optimizer might still use a merge join operator with rewind logic. In that case, it needs to use a worktable to save rows from one input aside to be able to reuse them when duplicate matching rows exist in the other side. A merge join requires at least one of the join predicates to be an equi-join predicate (with the exception of a full outer join). As for logical join types, a merge join algorithm cannot be used with a cross join. It can be used with inner, outer, and semi joins. Cross joins have an exception in which a merge join can be used when it s an inner join disguised as a cross join (for example, T1 CROSS JOIN T2 ON T1.keycol = T2.keycol). Merge can work well with medium- to large-sized inputs provided that they are presorted. For example, the following query joins Customers and Orders on equal custid values:
You have in your PowerPoint le a powerful planning tool, with each slide representing one idea that you will convey at one point in the presentation as summarized by the headline. You will probably add graphics to most of these slides to illustrate the headlines, but you don t have to limit yourself to showing information on a slide exclusively with a graphic; you can use other media tools and techniques. For example, use a physical prop that you hold in your hands or pass around to audience members to communicate an Explanation slide, as shown in Figure 6-14. You might switch to a different software application on your desktop to communicate the headlines across three Detail slides. Or you might use a brief video clip to illustrate each of your three Key Point slides. The storyboard will guide you as you decide whether to use different media you will speci cally choose to include different media based on the slide s headline and its location within the Act II hierarchy. For example, you wouldn t use your most memorable video clip on a Detail slide because you don t want your audience to remember the Detail slides over the Key Point slides you would integrate and use the clip through the Key Point slides instead.
Using the AsP.nET Trace Facility
... // copy the string portion of the table, along the way omitting // strings that are to be deleted // ... determine number of strings in the table
Administrator modules function in the same way as front-end modules, but they are used within the Administrator interface. An Administrator module is never seen by a front-end user because it generally exposes private system information and may help with maintenance and administration of the site neither of which you want shown to the visiting public. In this example, the module will list content articles that are missing key information the article metadata. For proper SEO, each web page should contain two pieces of unique metadata information: the metadescription and metakeywords fields. These fields are used by the search engine spider to determine how to index and display the content. In fact, Google uses the metadescription field of an article to display the brief summary of the page, as shown in Figure 13-3.
Figure 11-5. Expression Blend s timeline for a storyboard The timeline in Figure 11-5 is actually the implemented timeline for the storyboard shown earlier in Figure 11-2. The three objects in the storyboard are listed in the Objects and Timeline panel. To the right of each of these objects, you see the timeline with just over 10 seconds showing horizontally. At time 0, there are three keyframes added, indicating that some animation action is taking place at that time. Then, at 4 seconds into the timeline, you see two keyframes providing the end point of the circle and smaller rectangle s movement from left to right. At 8 seconds through the timeline, there are two final keyframes: one providing an end point for the smaller rectangle turning into a square and one changing the larger rectangle to black. To better understand how Expression Blend can help you build yyour animations, let s run through an exercise.
Enabling Aging Aging in DNS refers to the process of placing a timestamp on a dynamically registered resource record and then tracking the age of this record. Scav enging refers to the process of deleting outdated resource records on which time-
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