Above and beyond in Visual Basic .NET

Creator DataMatrix in Visual Basic .NET Above and beyond

Above and beyond
ECC200 Drawer In VB.NET
Using Barcode printer for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Recognize ECC200 In Visual Basic .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
I d like you to try repeating the previous example, but this time don t type it all on one line. Type it exactly as it s shown here in the book, on three lines total. You ll notice after typing the first line, which ends in a pipe character, that PowerShell changes its prompt. That s because you ended the shell in a pipe, and the shell knows that there are more commands coming. It will enter this same waiting for you to finish mode if you hit Return without properly closing all curly braces, quotation marks, and parentheses. If you didn t mean to enter that extended-typing mode, hit Ctrl-C to abort, and start over. In this case, you could type the second line of text and hit Return, and then type the third line and hit Return. In this mode, you ll have to hit Return one last time, on a blank line, to tell the shell you re done. When you do so, it will execute the command as if it had been typed on a single, continuous line.
Encoding Barcode In VB.NET
Using Barcode generator for .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Draw 1D Barcode In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create Linear image in VS .NET applications.
www.OnBarcode.com
Going out: to a file, a printer, or the host
Draw Matrix In VB.NET
Using Barcode printer for .NET Control to generate, create 2D image in VS .NET applications.
www.OnBarcode.com
EAN / UCC - 14 Creation In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create EAN / UCC - 14 image in VS .NET applications.
www.OnBarcode.com
Once something is formatted, you have to decide where it will go. If a command line ends in a Format- cmdlet, the formatting instructions created by the Format- cmdlet will go to Out-Default, which forwards them to Out-Host, which displays them on the screen:
UPC Code Printer In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create UPC Symbol image in .NET framework applications.
www.OnBarcode.com
Royal Mail Barcode Generator In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create RM4SCC image in VS .NET applications.
www.OnBarcode.com
Get-Service | Format-Wide
Data Matrix Printer In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
www.OnBarcode.com
Data Matrix 2d Barcode Drawer In Visual Studio .NET
Using Barcode creator for .NET framework Control to generate, create Data Matrix image in VS .NET applications.
www.OnBarcode.com
Formatting and why it s done on the right
Drawing Barcode In .NET
Using Barcode generator for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
Data Matrix 2d Barcode Creation In .NET
Using Barcode generation for VS .NET Control to generate, create Data Matrix image in .NET framework applications.
www.OnBarcode.com
You could also manually pipe the formatting instructions to Out-Host, which would accomplish exactly the same thing:
Generating EAN128 In .NET
Using Barcode printer for Reporting Service Control to generate, create GS1 128 image in Reporting Service applications.
www.OnBarcode.com
GS1-128 Generation In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create GTIN - 128 image in ASP.NET applications.
www.OnBarcode.com
Get-Service | Format-Wide | Out-Host
European Article Number 13 Scanner In .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
www.OnBarcode.com
Alternatively, you can pipe formatting instructions to either Out-File or Out-Printer to direct formatted output to a file or to hardcopy. As you ll read later, in Common points of confusion, only one of those three Out- cmdlets should ever follow a Format- cmdlet on the command line. Keep in mind that both Out-Printer and Out-File default to a specific character width for their output, which means a hardcopy or a text file might look different from what would display on the screen. The cmdlets have a -width parameter that enables you to change the output width, if desired, to accommodate wider tables.
Barcode Reader In .NET Framework
Using Barcode Control SDK for ASP.NET Control to generate, create, read, scan barcode image in ASP.NET applications.
www.OnBarcode.com
Barcode Creator In Java
Using Barcode printer for BIRT reports Control to generate, create Barcode image in BIRT reports applications.
www.OnBarcode.com
Another out: GridViews
Painting Code 39 In Java
Using Barcode encoder for Android Control to generate, create Code 39 Full ASCII image in Android applications.
www.OnBarcode.com
Scan Barcode In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
You ve seen Out-GridView in previous chapters, and I mention it here because it s another useful form of output. Note that this isn t technically formatting; in fact, OutGridView entirely bypasses the formatting subsystem. No Format- cmdlets are called, no formatting instructions are produced, and no text output is displayed in the console window. Out-GridView can t receive the output of a Format- cmdlet it can only receive the regular objects output by other cmdlets. Figure 8.7 shows what the grid view looks like.
The results of the Out-GridView cmdlet
Common points of confusion
Common points of confusion
As I mentioned at the start of this chapter, the formatting system has most of the gotchas that trip up PowerShell newcomers. There are two main things that my classroom students tend to run across, so I ll try to help you avoid them.
Always format right
It s incredibly important that you remember one rule from this chapter: format right. In other words, your Format- cmdlet should be the last thing on the command line, with Out-File or Out-Printer as the only real exceptions. The reason for this rule is that the Format- cmdlets produce formatting instructions, and only an Out- cmdlet can properly consume those instructions. If a Format- cmdlet is last on the command line, the instructions will go to Out-Default (which is always at the end of the pipeline), which will forward them to Out-Host, which is happy to work with formatting instructions. Try running this command to illustrate the need for this rule:
Get-Service | Format-Table | Gm
You ll notice, as shown in figure 8.8, that Gm isn t displaying information about your service objects, because the Format-Table cmdlet doesn t output service objects. It consumes the service objects you piped in, and it outputs formatting instructions which is what Gm sees and reports on.
Figure 8.8 Formatting cmdlets produce special formatting instructions, which aren t meaningful to humans.
Copyright © OnBarcode.com . All rights reserved.