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The previous code generates a track that s completely flat. This is because it starts from the idea that the normal vector in each point of the track is the (0,1,0) Up vector. Although this will give a valid track, you ll have a tough time keeping your car on the track in some sharp corners. Don t even think about adding loopings to your track. To make the track more realistic, you ll want to bank your track to prevent your car from swinging out of its corners. The previous code used the (0,1,0) Up vector as the normal vector to calculate the side vector. This time, you re going to use a more appropriate normal vector. It s quite impossible to calculate this normal to take banking into account. The solution to this is to remember the last normal vector and adjust this for each point in your track.

Unfortunately, this is complicated slightly by the fact that the source object could be one of several object types. The GetIList() method sorts that out and ensures that it is an IList that is passed to the CopyData() method. GetIList() looks like this: Private Function GetIList(ByVal source As Object) As IList If TypeOf source Is IListSource Then Return CType(source, IListSource).GetList ElseIf TypeOf source Is IList Then Return CType(source, IList) Else ' they gave us a regular object - create a list Dim col As New ArrayList col.Add(source) Return CType(col, IList) End If End Function If the source object implements the IListSource interface, then its GetList() method is used to retrieve the underlying IList. This is typically the case with a DataTable, for instance. If the source object directly implements IList, then it is simply cast and returned. Otherwise, the source object is assumed to be a simple type (such as String), a Structure, or an object. In order to return an IList in this case, an ArrayList is created, the source object is added to the ArrayList, and it is returned as the result. Since ArrayList implements IList, the end result is that an IList is returned.

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In the following section, you will learn to capture device-specific exceptions. You will be using the accelerometer device as an example to properly handle unexpected exceptions by catching AccelerometerFailedException. AccelerometerFailedException can occur if the accelerometer device on the phone is broken. Also the exception can occur if the device throws unexpected error caused internally by Microsoft Window Phone framework. Figure 4 16 displays the basic UI of the CatchDeviceExceptionDemo project that you will be building.

This code produces the following output. The first four lines are the result of both handlers being called twice, in the first two seconds. After the handler for ClassB is removed, only the handler for the instance of ClassA is called, during the last two seconds. Class Class Class Class Class Class Class A B A B B A A handler called handler called handler called handler called event handler removed handler called handler called

Figure 9-15 shows the Data Sources window with the Projects node expanded and being changed to create a details form.

Alternatively, you could simply set the opposite value:

<diagnostics> <messageLogging logMalformedMessages="true" logMessagesAtServiceLevel="true" logEntireMessage="true" logMessagesAtTransportLevel="true" /> </diagnostics> </system.serviceModel> <system.diagnostics> <sources> <source name="System.ServiceModel.MessageLogging" switchValue="Information, ActivityTracing"> <listeners> <add name="ServiceModelMessageLoggingListener" /> </listeners> </source> <source name="System.ServiceModel" switchValue="Verbose, ActivityTracing" propagateActivity="true"> <listeners> <add name="ServiceModelTraceListener" /> </listeners> </source> </sources> <sharedListeners> <add initializeData="messages.svclog" type="System.Diagnostics.XmlWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" name="ServiceModelMessageLoggingListener" traceOutputOptions="Timestamp"> </add> <add initializeData="tracelog.svclog" type="System.Diagnostics.XmlWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" name="ServiceModelTraceListener" traceOutputOptions="Timestamp"> </add> </sharedListeners> <trace autoflush="true" /> </system.diagnostics> </configuration> In order to test the results locally we need to set up a SQL Server database. The WF workflow state machine runtime needs SQL Server database support to persist runtime transaction data. This database can be set up using a SQL script. The SQL scripting file used to create this database can be found in C:\Windows\Microsoft.NET\Framework\v3.0\Windows Workflow Foundation\SQL\EN, as Figure 7-14 shows. Before running the script from SQL Server Management Studio, manually create a new database WorkflowPersistenceStore from SQL Server Management Studio or run CREATE TABLE WorkflowPersistenceStore.

claim.Resource.ToString(), "http://docs.oasis-open.org/wsfed/authorization/200706/claims/action", claimValue)) { if (AccessControlHelper.IsIssuedByIbn(claimSet)) { return; } } } } throw new FaultException("Access denied."); } static bool IsIssuedByIbn(ClaimSet claimSet) { foreach (Claim claim in claimSet.Issuer) { if (AccessControlHelper.CheckClaim( claim.ClaimType, claim.Resource.ToString(), "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/dns", "accesscontrol.windows.net")) { return true; } } return false; } static bool CheckClaim(string claimType, string claimValue, string expectedClaimType, string expectedClaimValue) { if ( StringComparer.OrdinalIgnoreCase.Equals(claimType, expectedClaimType) && StringComparer.OrdinalIgnoreCase.Equals(claimValue, expectedClaimValue) ) { return true; } return false; } } } Now let's modify the WCF service operation implementation. For all implementations of the operation in the WCF service contract we need to insert the code to demand the claim for the security token by using the previous helper class as Listing 5-18 shows.

package com.portalbook.portlets.content; import java.io.IOException; import java.io.Writer; import java.util.ArrayList;

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