.net pdf 417

.net pdf 417

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Writing asynchronous code in different environment presents different problems. Threading models in Windows Forms are different than threading models in ASP.NET. A Windows Forms threading model prefers that any user interface code runs directly on the main user interface thread. Contrast this with ASP.NET, where most work is done inside a thread pool so that asynchronous calls can happen on any thread in that pool. To deal with these different threading models, the .NET Framework supports the SynchronizationContext class, which allows you to write code without knowing the threading model of the particular application. To use the SynchronizationContext class, you would first get an instance of the SynchronizationContext class by calling the static Current property of the SynchronizationContext class. Once you have an instance of the SynchronizationContext class, you can take either of the following actions:

In the existing query window, below the existing code, type, highlight, and execute the following code to create a grouping set on the SalesOrderID and ProductID columns without any rollup operations. Review the result set:

You are a systems administrator for Lucerne Publishing. Editors store manuscripts on their local computers during the reviewing process, which consumes a large amount of disk space. One user, Lori Shea, ran out of disk space on her FAT32-formatted C:\ drive and purchased an external hard drive that connects to the computer via USB 2.0. She plugged it in and could immediately use it because it was preformatted with the FAT32 file system. The fact that it uses a separate drive letter (E:\) disturbs her folder organization, however. She would rather have the drive available as a subfolder of My Documents. Which of the following solutions would meet her requirements A. Use the Disk Management snap-in in the Computer Management console to reformat the drive using the NTFS file system. Then, create a new subfolder in My Documents, and mount the new drive in that folder. B. Open a command prompt and run the command convert C:/fs:ntfs. Then, create a new subfolder in My Documents, and mount the new drive in that folder. C. Create a new subfolder in My Documents. Then, open a command prompt and run the command fsutil reparsepoint E: destination_folder. D. Create a new subfolder in My Documents. Then, open a command prompt and run the command format E /FS:NTFS /C: destination_folder.

Questions and Answers 13-53

Correct Answers: C A. Incorrect: Winmsd.exe launches the Help And Support Services tool, which provides useful information about the system s configuration. Although this tool cannot be used to find unsigned drivers, it can be used to launch the File Signature Verification tool. To launch this tool, select File Signature Verification Utility from the Tools menu. B. Incorrect: Running the Fsutil.exe command-line utility is useful for modifying aspects of the file system. However, this tool cannot be used to verify driver signatures. C. Correct: Sigverif.exe is the correct command to launch the File Signature Verification utility. This tool can also be launched from the System Information program located in the Start menu in the folder called All Programs\Accessories\System Tools. D. Incorrect: The Regedit.exe command launches the Registry Editor, which is used to modify system configuration parameters. It cannot be used to verify driver signatures.

After this lesson, you will be able to:

HRESULT STDMETHODCALLTYPE CManipulationEventSink::ManipulationDelta(x, y, translationDeltaX, .... ) { m_pcDrawingObject->ApplyManipulationDelta (translationDeltaX, translationDeltaY, scaleDelta, rotationDelta); return S_OK; }

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Data in a database would not be very useful if you could not get it back out in a desired format. One of the main purposes of Transact-SQL is to enable database developers to write queries to return data in many different ways. In this lesson, you will learn various methods of querying data by using TransactSQL, including some of the more advanced options that you can use to more easily get data back from your databases.

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Watch for questions that use Windows 2000 ICS for remote assistance from a big, corporate help desk to a small satellite office. Because Windows 2000 ICS does not support UPnP Remote Assistance problems will abound. ,

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