c# barcode zebra printer Formatting and why it s done on the right in VB.NET

Drawer ECC200 in VB.NET Formatting and why it s done on the right

Formatting and why it s done on the right
Data Matrix 2d Barcode Encoder In Visual Basic .NET
Using Barcode printer for .NET Control to generate, create DataMatrix image in .NET applications.
www.OnBarcode.com
ECC200 Reader In VB.NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Now try this:
Barcode Generation In VB.NET
Using Barcode printer for Visual Studio .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Create 1D Barcode In VB.NET
Using Barcode creator for .NET Control to generate, create Linear Barcode image in .NET framework applications.
www.OnBarcode.com
Get-Service | Select Name,DisplayName,Status | Format-Table | ConvertTo-HTML | Out-File services.html
USS Code 39 Encoder In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create USS Code 39 image in .NET framework applications.
www.OnBarcode.com
Code 128C Generator In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create Code 128 Code Set A image in Visual Studio .NET applications.
www.OnBarcode.com
Go ahead and open Services.html in Internet Explorer, and you ll see some pretty crazy results. You didn t pipe service objects to ConvertTo-HTML; you piped formatting instructions, so that s what got converted to HTML. This illustrates why a Formatcmdlet, if you use one, either has to be the last thing on the command line, or has to be second-to-last with the last cmdlet being Out-File or Out-Printer. Also know that Out-GridView is unusual (for an Out- cmdlet, at least) in that it won t accept formatting instructions and will only accept normal objects. Try these two commands to see the difference:
Draw EAN / UCC - 14 In VB.NET
Using Barcode creation for .NET framework Control to generate, create GTIN - 128 image in .NET applications.
www.OnBarcode.com
Painting British Royal Mail 4-State Customer Barcode In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create Royal Mail Barcode image in VS .NET applications.
www.OnBarcode.com
PS C:\>Get-Process | Out-GridView PS C:\>Get-Process | Format-Table | Out-GridView
Data Matrix ECC200 Creator In VB.NET
Using Barcode printer for .NET framework Control to generate, create Data Matrix 2d barcode image in .NET applications.
www.OnBarcode.com
ECC200 Creation In None
Using Barcode creation for Software Control to generate, create ECC200 image in Software applications.
www.OnBarcode.com
That s why I explicitly mentioned Out-File and Out-Printer as the only cmdlets that should follow a Format- cmdlet (technically, Out-Host can also follow a Formatcmdlet, but there s no need because ending the command line with the Formatcmdlet will get the output to Out-Host anyway).
UCC.EAN - 128 Creator In Objective-C
Using Barcode generation for iPad Control to generate, create EAN128 image in iPad applications.
www.OnBarcode.com
Paint ECC200 In Java
Using Barcode generation for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
One type of object at a time, please
Make Code 39 Full ASCII In .NET Framework
Using Barcode printer for .NET Control to generate, create Code 39 image in Visual Studio .NET applications.
www.OnBarcode.com
Drawing QR In Java
Using Barcode drawer for Java Control to generate, create QR-Code image in Java applications.
www.OnBarcode.com
The next thing to avoid is putting multiple kinds of objects into the pipeline. The formatting system looks at the first object in the pipeline and uses the type of that object to determine what formatting to produce. If the pipeline contains two or more kinds of objects, the output won t always be complete or useful. For example, run this:
EAN / UCC - 13 Generation In Java
Using Barcode encoder for Java Control to generate, create UPC - 13 image in Java applications.
www.OnBarcode.com
DataMatrix Scanner In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Get-Process; Get-Service
Printing QR In None
Using Barcode creation for Software Control to generate, create QR Code JIS X 0510 image in Software applications.
www.OnBarcode.com
Draw PDF-417 2d Barcode In Visual Studio .NET
Using Barcode encoder for Reporting Service Control to generate, create PDF417 image in Reporting Service applications.
www.OnBarcode.com
Figure 8.9 Putting two types of objects into the pipeline at once can confuse PowerShell s formatting system.
Read Barcode In VB.NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
UPC Code Creation In Java
Using Barcode creation for Eclipse BIRT Control to generate, create Universal Product Code version A image in BIRT applications.
www.OnBarcode.com
That semicolon allows me to put two commands onto a single command line, without piping the output of the first cmdlet into the second one. In other words, both cmdlets will run independently, but they will put their output into the same pipeline. As you ll see if you try this, or look at figure 8.9, the output starts out fine, displaying process objects. But the output breaks down when it s time to display the service objects. Rather than producing the table you re used to, PowerShell reverts to a list. The formatting system simply isn t designed to take multiple kinds of objects and make the results look as attractive as possible.
Above and beyond
Technically, the formatting system can handle multiple types of objects if you tell it how. Run Dir | Gm and you ll notice that the pipeline contains both DirectoryInfo and FileInfo objects (Gm has no problem working with pipelines that contain multiple kinds of objects and will display member information for all of them). When you run Dir by itself, the output is perfectly legible. That s because Microsoft provides a predefined custom formatting view for DirectoryInfo and FileInfo objects, and that view is handled by the Format-Custom cmdlet. Format-Custom is mainly used to display different predefined custom views. You could technically create your own predefined custom views, but the necessary XML syntax is complicated and isn t publicly documented at this time. So custom views are pretty much limited to what Microsoft provides. Microsoft s custom views do get a lot of usage, though. PowerShell s help information is stored as objects, for example, and the formatted help files you see on the screen are the result of feeding those objects into a custom view.
What if you want to combine information drawn from two (or more) different places into a single form of output You absolutely can, and you can do so in a way that the formatting system can deal with very nicely. But you have a lot more to learn before that I ll get to it in chapter 19.
8.10 Lab
See if you can complete the following tasks:
Display a table of processes that includes only the process names, IDs, and whether or not they re responding to Windows (the Responding property has that information). Have the table take up as little horizontal room as possible, but don t allow any information to be truncated. Display a table of processes that includes the process names and IDs. Also include columns for virtual and physical memory usage, expressing those values in megabytes (MB). Use Get-EventLog to display a list of available event logs. (Hint: You ll need to read the help to learn the correct parameter to accomplish that.) Format the
Copyright © OnBarcode.com . All rights reserved.