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ValidateCountAttribute Class

[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

Defines an attribute that uses maximum and minimum limits to validate the number of arguments that a cmdlet parameter accepts. (This attribute can also be used by Windows PowerShell functions.)


Namespace: System.Management.Automation
Assembly: System.Management.Automation (in System.Management.Automation)
VB
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'Usage
Dim instance As ValidateCountAttribute
C#
C++
VB
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[AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field)] 
public sealed class ValidateCountAttribute : ValidateArgumentsAttribute
J#
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/** @attribute AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field) */ 
public final class ValidateCountAttribute extends ValidateArgumentsAttribute
JScript
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AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field) 
public final class ValidateCountAttribute extends ValidateArgumentsAttribute

The following code example shows how this attribute can be declared:

C#
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[ValidateCount(1, 3)]
[Parameter(Position = 0, Mandatory = true)]
public string[] UserNames
{
  get { return userNames; }
  set { userNames = value; }
}

private string[] userNames;

There are no established scenarios for explicitly creating a ValidateCountAttribute object from within a cmdlet. The ValidateCountAttribute object is created and used indirectly when the attribute is declared.

The cmdlet declares this attribute when implementing a cmdlet parameter. For more information about the syntax and parameters that are used when declaring this, see ValidateCount Attribute Declaration.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

 

Target Platforms

Windows Developer Preview, Windows Server Developer Preview

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