This method updates the password for a user.

Declaration

// C#
public override bool ChangePassword(string userName, string oldPassword, 
  string newPassword);

Parameters

• userName

  The user to update the password for.

• oldPassword

  The current password for the specified user.

• newPassword

  The new password for the specified user.

Return Value

Returns true if the password was updated successfully; otherwise, returns false.

Exceptions

ArgumentNullException - The userName, oldPassword, or newPassword parameter is null.

System.Web.Security.MembershipPasswordException - userName was not found in the membership database.

System.Configuration.Provider.ProviderException - An error occurred when setting the new password in the database.

Exception - An unhandled exception has occurred.

ArgumentException - One of the following conditions exists:

• The userName parameter is an empty string, contains a comma, or is longer than 256 characters.

• The oldPassword parameter is an empty string or is longer than 128 characters.

• The newPassword parameter is an empty string, is longer than 128 characters (including the encoded version), is less than the value of the MinRequiredPasswordLength property, has a number of nonalphanumeric characters less than the value of MinRequiredNonAlphanumericCharacters property, or does not match the regular expression defined in the PasswordStrengthRegularExpression property.

• The change-password operation was canceled by a subscriber to the ValidatingPassword event, and the FailureInformation property was a null reference.

Remarks

The ChangePassword method returns true if the supplied user name and password are valid and the password was updated successfully; otherwise, it returns false.