.net barcode reader sdk Properties and Methods in .NET framework

Generator QR in .NET framework Properties and Methods

Properties and Methods
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Since what is actually stored in a variable is a NET object, you can use all of its methods and properties You can use the Windows PowerShell Get-Member cmdlet to retrieve all members of an object Let s store an object of the type SystemString in a variable and explore its methods and properties
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PS > [string]$url = "http://SPServer01" PS > $url | Get-Member
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The Get-Member cmdlet returns information about the properties and methods of the object, as well as its type, as shown in Figure 5-1 Now that we know which methods and properties the object supports, we can use them to retrieve information and manipulate the object For example, to find out how many characters the string contains, type the following:
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PS > $urlLength 17
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The output tells us that the string s length is 17 characters We can manipulate the string through the various methods available For example, we could change all the characters to uppercase, like this:
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PS > $urlToUpper() HTTP://SPSERVER01
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Notice that method calls in Windows PowerShell end with parentheses, as is common syntax for method invocation in many scripting and programming languages If a method accepts parameters, those need to be specified within the parentheses Let s look at the Replace() method of the SystemString type as an example:
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PS > $urlReplace("http://","https://") https://SPServer01
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Variables, Arrays, and Hashtables
Figure 5-1 Using the Get-Member cmdlet to retrieve methods and properties
When you use the Replace() method, you need to provide additional information to the method telling it what to replace and what to replace it with A simple way of finding information about a method is by calling the method without the parentheses
PS > $urlReplace
Figure 5-2 shows the information returned for the Replace() method
Figure 5-2 Getting the Replace() method definition
PowerShell for Microsoft SharePoint 2010 Administrators
Another resource is the MSDN library (http://msdnmicrosoftcom), which provides information about the classes in NET, including the methods and properties they support To get information about the Replace() method, search for SystemString Replace In the following example, we store the output from the Get-SPWeb cmdlet in a variable and use the various methods and properties to work with the stored object We also use the value stored in the $url variable as input
PS > $url = "http://SPServer01" PS > $spWeb = Get-SPWeb -Identity $url
When we type the variable s name, the default properties of the object are displayed in the console, as shown here:
PS > $spWeb Url --http://spserver01
To display all of the object s properties, pipe the object to the Format-List cmdlet, as shown in this example:
PS > $spWeb | Format-List
Let s take a closer look at the methods and properties available on the SPWeb object
PS > $spWeb | Get-Member
Figure 5-3 shows the available methods and properties You can retrieve values of specific properties by using standard property notation appending a property s name to the object-containing variable with a dot
PS > $spWebUrl http://spserver01 PS > $spWebTitle Home PS > $spWebCreated Sunday, March 28, 2010 11:44:11 PM
You can also use a pipeline and the Select-Object cmdlet to retrieve specific properties from a site
PS > $spWeb | Select-Object -property IsRootWeb, WebTemplate, WebTemplateID IsRootWeb --------True WebTemplate ----------STS WebTemplateId ------------1
5:
Variables, Arrays, and Hashtables
Figure 5-3 Methods and properties of an SPWeb object
In the example, we select the IsRootWeb property, which tells us if the current site is the root site of a site collection, and the WebTemplate and WebTemplateId properties, which indicate the site definition and configuration (template) used to create the site (in this case, STS1, which corresponds to the Blank Site template) Our new variable $spWeb is an instance of the MicrosoftSharePointSPWeb type, which lets us access the broad variety of methods and properties offered by this type In the next example, we use this object s EnsureUser method to check if a specific login name belongs to a valid user of a SharePoint site
PS > $spWebEnsureUser("powershell\sezel") UserLogin --------POWERSHELL\sezel DisplayName ----------Sergey Zelenov
Since the user sezel is not currently a known user of the site, the user is added to the site s User Info list You can also modify the site through the methods and properties available In 4, we used the Set-SPWeb cmdlet to change the description of a site This can also be done directly through the Description property available on the object
PS > $spWebDescription Home PS > $spWebDescription = "Changed through PowerShell"
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