Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

How to Validate the Argument Length

 

This example shows how to specify a validation rule that the Windows PowerShell runtime can use to check the number of characters (the length) of the parameter argument before the cmdlet is run. You set this validation rule by declaring the ValidateLength attribute.

System_CAPS_noteNote

For more information about the class that defines this attribute, see ValidateLengthAttribute.

To validate the argument length

  • Add the Validate attribute as shown in the following code. This example specifies that the length of the argument should have a length of 0 to 10 characters.

    [ValidateLength(0, 10)]
    [Parameter(Position = 0, Mandatory = true)]
    public string UserName
    {
      get { return userName; }
      set { userName = value; }
    }
    private string userName;
    

For more information about how to declare this attribute, see ValidateLength Attribute Declaration.

Show: