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MembershipProvider.MinRequiredNonAlphanumericCharacters Property

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

Namespace:  System.Web.Security
Assembly:  System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)
public abstract int MinRequiredNonAlphanumericCharacters { get; }

Property Value

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

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

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 SqlMembershipProvider class to provide membership services, and sets the minRequiredNonalphanumericCharacters attribute to 1 character.

<membership>
  <providers>
    <clear/>
    <add name="AspNetSqlMembershipProvider" 
      type="System.Web.Security.SqlMembershipProvider" 
      connectionStringName="ApplicationServices" 
      enablePasswordRetrieval="false" 
      enablePasswordReset="true" 
      requiresQuestionAndAnswer="false" 
      requiresUniqueEmail="false" 
      maxInvalidPasswordAttempts="5" 
      minRequiredPasswordLength="6" 
      minRequiredNonalphanumericCharacters="1" 
      passwordAttemptWindow="10" 
      applicationName="/"/>
  </providers>
</membership>

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4

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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