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Click OK to complete the export of the query. When the export is finished, Access starts your browser and shows you the result that you can see in Figure 26-9. You can see that because you asked Access to export formatted, the table now has column headings and is using the font and gridlines specified for the query datasheet. You can find this sample page saved as qryFacilitiesCustomDS.

When you take the time to format a table, query, or form datasheet before you export it to HTML, you can see that the result is superior to the default export format. You can take this one step further by defining a template HTML file and asking Access to apply the template when it exports your data. In fact, creating a template is a good way to establish a common design for all your Web pages. Not only can you use a template to improve the appearance of 992

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Checking a proposed new field validation rule is simple. But what about making a change to a table validation rule Typically, a table validation rule compares one field with another, so to check a new rule, you ll need more complex criteria in your query. There s already a table validation rule in tblFacilityRooms in the HousingDataCopy.mdb sample database. The rule makes sure that the weekly rate is not more than 7 times the daily 250

XElement x = XElement.Load("http://msdn.microsoft.com/rss.xml");

Creating and Working with Simple Queries rate it wouldn t be much of a discount if it were! Suppose you now want to be sure that the weekly rate reflects a true discount from the daily rate. Your proposed new rule might make sure that the weekly rate is no more than 6 times the daily rate if an employee stays a full week, the last night is essentially free. Your new rule might look like the following:

([DailyRate]*6)>=[WeeklyRate]

So, you need to write a query that checks the current values in the WeeklyRate field to see if any will fail the new rule. Note that you could also create an expression to calculate DailyRate times 6 and compare that value with the WeeklyRate value. When the expression you want to test involves a calculation on one side of the comparison with a simple field value on the other side of the comparison, it s easier to compare the simple field with the expression. Remember, you need to create the converse of the expression to find rows that won t pass the new rule. You can start with the query you built in the previous section or create a new query. You need at least the primary key fields from the table as well as the fields you need to perform the comparison. In this case, you need to compare the current value of WeeklyRate with the expression on DailyRate. Let s turn the expression around so that it s easier to see what you need to enter in the query design grid. The expression looks like this:

[WeeklyRate]<=([DailyRate]*6)

By default, when XML is loaded into a XDocument or XElement, the whitespace within the document is removed. If you want to preserve the whitespace within the source document, you can overload the Load method so it takes a LoadOptions flag. The LoadOptions flag can be used to indicate the options to use when loading the XML. The available options are None, PreserveWhitespace, SetBaseUri, and SetLineInfo. Let s load the RSS from MSDN again, but this time preserve whitespace by passing the LoadOptions.PreserveWhitespace flag.

To test the converse on the WeeklyRate field s Criteria row of your query, you need either:

>([DailyRate]*6)

Not <=([DailyRate]*6)

Your test query should look like Figure 7-28.

string xmlUrl = "http://msdn.microsoft.com/rss.xml"; XElement x = XElement.Load(xmlUrl, LoadOptions.PreserverWhitespace);

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Winlogon then notifies registered network providers that a user has logged in The Microsoft network provider, Multiple Provider Router (\Windows\System32\Mprdll), restores the user s persistent drive letter and printer mappings stored in HKCU\Network and HKCU\Printers, respectively Figure 13-3 shows the process tree as seen in Process Monitor after a logon (using its boot logging capability) Note the Smss processes that are dimmed (meaning that they have since exited) These refer to the spawned copies that initialized each session..

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