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ActiveDirectoryMembershipProvider.MinRequiredNonAlphanumericCharacters Property

Gets the minimum number of special characters that must be present in a valid password.

Namespace:  System.Web.Security
Assembly:  System.Web (in System.Web.dll)

public override int MinRequiredNonAlphanumericCharacters { get; }

Property Value

Type: System.Int32
The minimum number of special characters that must be present in a valid password.

ExceptionCondition
InvalidOperationException

The MinRequiredNonAlphanumericCharacters property is accessed before the ActiveDirectoryMembershipProvider instance is initialized.

The MinRequiredNonAlphanumericCharacters property returns the minimum number of special, non-alphanumeric characters that must be entered to create a valid password.

The MinRequiredNonAlphanumericCharacters property value is set in the application configuration using the minRequiredNonalphanumericCharacters attribute of the membership Element (ASP.NET Settings Schema) configuration element.

A non-alphanumeric character is a character for which the IsLetterOrDigit method returns false.

The following example shows the membership Element (ASP.NET Settings Schema) configuration element in the system.web section of the application's Web.config file. It specifies that the application use an instance of the ActiveDirectoryMembershipProvider class to provide membership services, and sets the minRequiredNonalphanumericCharacters attribute to one character.

<configuration>
  <connectionStrings>
    <add name="ADService" connectionString="LDAP://ldapServer/" />
  </connectionStrings>
  <system.web>
    <membership defaultProvider="AspNetActiveDirectoryMembershipProvider">
      <providers>
        <add name="AspNetActiveDirectoryMembershipProvider" 
          type="System.Web.Security.ActiveDirectoryMembershipProvider, 
          System.Web, Version=2.0.3600, Culture=neutral, 
          PublicKeyToken=b03f5f7f11d50a3a"
          minRequiredNonalphanumericCharacters = "1" />
      </providers>
    </membership>
  </system.web>
</configuration>

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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