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Figure 12-21. Adding a Resource Dictionary You can then add your style information to the resource dictionary as the following code displays. <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Style x:Key="Heading1" TargetType="TextBlock"> <Setter Property="FontSize" Value="22" /> <Setter Property="Foreground" Value="Silver" /> </Style> <Style x:Key="Heading2" TargetType="TextBlock"> <Setter Property="FontSize" Value="18" /> </Style> </ResourceDictionary> Finally, to use the resource dictionary in your application, you need to add an entry in the ResourceDictionary.MergedDictionaries section, as shown in the following code. Once you have added the entry for the ResourceDictionary, you can then use the styles as normal. <UserControl.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Dictionary1.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </UserControl.Resources> <StackPanel x:Name="LayoutRoot">

you will have a tedious job of reassigning those posts. It would be nice if someone wrote a plug-in to allow mass assignment of categories to posts.

Transitive closure can create and lose predicates for you, and generally the impact will be good Occasionally, the side effects can be catastrophic, sometimes they may simply be surprising Although people sometimes insist on avoiding referential integrity constraints on data warehouses because of the overheads, remember that constraints may help the optimizer find a better execution plan And don t be surprised when Oracle picks up a constraint, turns it into a predicate, and then migrates it through transitive closure to a different table..

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Listing 10-8 Customized XML Output Using EXPLICIT Mode <Employee EmpID="1"> <FirstName>Nancy</FirstName> <LastName>Davolio</LastName> </Employee> You can identity two levels in this markup Level 1 consists of the <Employee> element, and level 2 consists of the <FirstName> and <LastName> elements The EmployeeID column is outputted as the EmpID attribute of the <Employee> element and hence belongs to level 1 When using EXPLICIT mode to generate this XML output, we will need to write two SELECT queries: The first query will outline the structure, nesting, and element names of the various columns involved The second query will actually fetch the data The results of the two queries will be merged with a UNION clause Let s look at the first SELECT query (see Listing 10-9) Listing 10-9.

Shows the session ID, request type, time of request, status code, and request/response encoding for the request Shows the various page life-cycle events and the time spent on processing each Shows each server control and its type, render size, view state size, and control state size in a parent-child tree Shows the various keys, their associated values, and their types defined in the page s session state Shows the various keys, their associated values, and their types defined in the server s application state Shows the name/value/size of each cookie Shows the name and value of each page header Shows the name and value for the server response Shows the various server variables and their values at the time of processing

public static void AddAuthenticationEntry(String urlBase, String userName, String password) { _entries.Add(new UrlAuthenticationEntry( urlBase,userName,password)); } public static void SetDefaultAuthenticationEntry(String userName, String password) { _defaultAuthenticationEntry = new UrlAuthenticationEntry( null,userName,password); } internal static UrlAuthenticationEntry GetAuthenticationEntry(String url) { foreach (UrlAuthenticationEntry entr in _entries) { // check if a registered entry matches the url-parameter if (url.ToUpper().StartsWith(entr.UrlBase)) { return entr; } } // if none matched, return the default entry (which can be null as well) return _defaultAuthenticationEntry; } } } The sink itself calls a method that checks if an authentication entry exists for the URL of the current message. It then walks the chain of sinks until reaching the final transport channel sink, on which is set the properties that contain the correct username and password. It finally sets a flag for this object s sink so that this logic will be applied only once per sink chain. The complete source for this sink can be found in Listing 13-18. Listing 13-18. The UrlAuthenticationSink using using using using System; System.Runtime.Remoting.Channels; System.Runtime.Remoting.Messaging; System.IO;

Defining the Structure of the XML Output SELECT 1 AS Tag, NULL AS Parent, EmployeeID AS [Employee!1!EmpID], FirstName AS [Employee!1!FirstName!element], LastName AS [Employee!1!LastName!element] FROM Employees The query selects five columns: 1, NULL, EmployeeID, FirstName, and LastName The last three columns are obvious, but what are 1 and NULL The Tag and Parent columns are implicit columns in the resultant table that are created by SQL Server internally: The Tag column specifies the nesting level of the current element A Tag value of 1 indicates that this query is defining the structure for level 1 of the XML output The Parent column specifies the parent level of the current tag A Parent value of NULL indicates that this is the top-level element Each column specified after the Parent column has some metadata specifications enclosed in square brackets.

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