SqlConnection.ChangePassword Método

Definición

Cambia la contraseña de SQL Server.Changes the SQL Server password.

Sobrecargas

ChangePassword(String, String)

Cambia la contraseña de SQL Server para el usuario indicado en la cadena de conexión a la nueva contraseña proporcionada.Changes the SQL Server password for the user indicated in the connection string to the supplied new password.

ChangePassword(String, SqlCredential, SecureString)

Cambia la contraseña de SQL Server para el usuario indicado en el objeto de SqlCredential.Changes the SQL Server password for the user indicated in the SqlCredential object.

ChangePassword(String, String)

Cambia la contraseña de SQL Server para el usuario indicado en la cadena de conexión a la nueva contraseña proporcionada.Changes the SQL Server password for the user indicated in the connection string to the supplied new password.

public:
 static void ChangePassword(System::String ^ connectionString, System::String ^ newPassword);
public static void ChangePassword (string connectionString, string newPassword);
static member ChangePassword : string * string -> unit
Public Shared Sub ChangePassword (connectionString As String, newPassword As String)

Parámetros

connectionString
String

Cadena de conexión que contiene suficiente información para conectarse al servidor que se desee.The connection string that contains enough information to connect to the server that you want. La cadena de conexión debe contener el identificador de usuario y la contraseña actual.The connection string must contain the user ID and the current password.

newPassword
String

Nueva contraseña que se va a configurar.The new password to set. Esta contraseña debe cumplir con las directivas de seguridad de contraseña configuradas en el servidor, incluidos la longitud mínima, los requisitos para caracteres específicos, etc.This password must comply with any password security policy set on the server, including minimum length, requirements for specific characters, and so on.

Excepciones

La cadena de conexión incluye la opción para utilizar la seguridad integrada.The connection string includes the option to use integrated security.

OOr newPassword tiene más de 128 caracteres.The newPassword exceeds 128 characters.

El valor de connectionString o de newPassword es null.Either the connectionString or the newPassword parameter is null.

Ejemplos

A continuación se facilita un ejemplo sencillo de cambiar una contraseña:The following is a simple example of changing a password:

class Program {  
   static void Main(string[] args) {  
      System.Data.SqlClient.SqlConnection.ChangePassword(  
        "Data Source=a_server;Initial Catalog=a_database;UID=user;PWD=old_password",   
       "new_password");  
   }  
}  
  
Module Module1  
    Sub Main()  
System.Data.SqlClient.SqlConnection.ChangePassword(  
        "Data Source=a_server;Initial Catalog=a_database;UID=user;PWD=old_password",   
       "new_password")  
    End Sub  
End Module  
  

La siguiente aplicación de consola muestra los problemas implicados en el cambio de la contraseña de un usuario porque ha expirado la contraseña actual.The following console application demonstrates the issues involved in changing a user's password because the current password has expired.

using System;
using System.Data;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        try
        {
            DemonstrateChangePassword();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
        Console.WriteLine("Press ENTER to continue...");
        Console.ReadLine();
    }

    private static void DemonstrateChangePassword()
    {
        // Retrieve the connection string. In a production application,
        // this string should not be contained within the source code.
        string connectionString = GetConnectionString();

        using (SqlConnection cnn = new SqlConnection())
        {
            for (int i = 0; i <= 1; i++)
            {
                // Run this loop at most two times. If the first attempt fails, 
                // the code checks the Number property of the SqlException object.
                // If that contains the special values 18487 or 18488, the code 
                // attempts to set the user's password to a new value. 
                // Assuming this succeeds, the second pass through 
                // successfully opens the connection.
                // If not, the exception handler catches the exception.
                try
                {
                    cnn.ConnectionString = connectionString;
                    cnn.Open();
                    // Once this succeeds, just get out of the loop.
                    // No need to try again if the connection is already open.
                    break;
                }
                catch (SqlException ex)
                {
                    if (i == 0 && ((ex.Number == 18487) || (ex.Number == 18488)))
                    {
                        // You must reset the password. 
                        connectionString =
                            ModifyConnectionString(connectionString, 
                            GetNewPassword());
                    }
                    else
                    {
                        // Bubble all other SqlException occurrences
                        // back up to the caller.
                        throw;
                    }
                }
            }
            SqlCommand cmd = new SqlCommand(
                "SELECT ProductID, Name FROM Product", cnn);
            // Use the connection and command here...
        }
    }

    private static string ModifyConnectionString(
        string connectionString, string NewPassword)
    {

        // Use the SqlConnectionStringBuilder class to modify the
        // password portion of the connection string. 
        SqlConnectionStringBuilder builder =
            new SqlConnectionStringBuilder(connectionString);
        builder.Password = NewPassword;
        return builder.ConnectionString;
    }

    private static string GetNewPassword()
    {
        // In a real application, you might display a modal
        // dialog box to retrieve the new password. The concepts
        // are the same as for this simple console application, however.
        Console.Write("Your password must be reset. Enter a new password: ");
        return Console.ReadLine();
    }

    private static string GetConnectionString()
    {
        // For this demonstration, the connection string must
        // contain both user and password information. In your own
        // application, you might want to retrieve this setting
        // from a config file, or from some other source.

        // In a production application, you would want to 
        // display a modal form that could gather user and password
        // information.
        SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(
            "Data Source=(local);Initial Catalog=AdventureWorks");

        Console.Write("Enter your user id: ");
        builder.UserID = Console.ReadLine();
        Console.Write("Enter your password: ");
        builder.Password = Console.ReadLine();

        return builder.ConnectionString;
    }
}
Option Explicit On
Option Strict On

Imports System.Data
Imports System.Data.SqlClient

Module Module1
    Sub Main()
        Try
            DemonstrateChangePassword()
        Catch ex As Exception
            Console.WriteLine("Error: " & ex.Message)
        End Try
        Console.WriteLine("Press ENTER to continue...")
        Console.ReadLine()
    End Sub

    Private Sub DemonstrateChangePassword()
        Dim connectionString As String = GetConnectionString()
        Using cnn As New SqlConnection()
            For i As Integer = 0 To 1
                ' Run this loop at most two times. If the first attempt fails, 
                ' the code checks the Number property of the SqlException object.
                ' If that contains the special values 18487 or 18488, the code 
                ' attempts to set the user's password to a new value. 
                ' Assuming this succeeds, the second pass through 
                ' successfully opens the connection.
                ' If not, the exception handler catches the exception.
                Try
                    cnn.ConnectionString = connectionString
                    cnn.Open()
                    ' Once this succeeds, just get out of the loop.
                    ' No need to try again if the connection is already open.
                    Exit For

                Catch ex As SqlException _
                 When (i = 0 And (ex.Number = 18487 Or ex.Number = 18488))
                    ' You must reset the password.
                    connectionString = ModifyConnectionString( _
                     connectionString, GetNewPassword())

                Catch ex As SqlException
                    ' Bubble all other SqlException occurrences
                    ' back up to the caller.
                    Throw
                End Try
            Next
            Dim cmd As New SqlCommand("SELECT ProductID, Name FROM Product", cnn)
            ' Use the connection and command here...
        End Using
    End Sub

    Private Function ModifyConnectionString( _
     ByVal connectionString As String, ByVal NewPassword As String) As String

        ' Use the SqlConnectionStringBuilder class to modify the
        ' password portion of the connection string. 
        Dim builder As New SqlConnectionStringBuilder(connectionString)
        builder.Password = NewPassword
        Return builder.ConnectionString
    End Function

    Private Function GetNewPassword() As String
        ' In a real application, you might display a modal
        ' dialog box to retrieve the new password. The concepts
        ' are the same as for this simple console application, however.
        Console.Write("Your password must be reset. Enter a new password: ")
        Return Console.ReadLine()
    End Function

    Private Function GetConnectionString() As String
        ' For this demonstration, the connection string must
        ' contain both user and password information. In your own
        ' application, you might want to retrieve this setting
        ' from a config file, or from some other source.

        ' In a production application, you would want to 
        ' display a modal form that could gather user and password
        ' information.
        Dim builder As New SqlConnectionStringBuilder( _
         "Data Source=(local);Initial Catalog=AdventureWorks")

        Console.Write("Enter your user id: ")
        builder.UserID = Console.ReadLine()
        Console.Write("Enter your password: ")
        builder.Password = Console.ReadLine()

        Return builder.ConnectionString
    End Function
End Module

Comentarios

Cuando se usa SQL Server en Windows Server, los desarrolladores pueden aprovechar las ventajas de la funcionalidad que permite a la aplicación cliente proporcionar la contraseña actual y una nueva con el fin de cambiar la contraseña existente.When you are using SQL Server on Windows Server, developers can take advantage of functionality that lets the client application supply both the current and a new password in order to change the existing password. Las aplicaciones pueden implementar funcionalidad como pedir al usuario una nueva contraseña durante el inicio de sesión inicial si la antigua ha expirado y esta operación se puede completar sin la intervención del administrador.Applications can implement functionality such as prompting the user for a new password during initial login if the old one has expired, and this operation can be completed without administrator intervention.

El método ChangePassword cambia el SQL Server contraseña para el usuario indicado en el parámetro connectionString proporcionado por el valor proporcionado en el parámetro newPassword.The ChangePassword method changes the SQL Server password for the user indicated in the supplied connectionString parameter to the value supplied in the newPassword parameter. Si la cadena de conexión incluye la opción de seguridad integrada (es decir, "Integrated Security = true" o equivalente), se produce una excepción.If the connection string includes the option for integrated security (that is, "Integrated Security=True" or the equivalent), an exception is thrown.

Para determinar que la contraseña ha expirado, al llamar al método Open se genera un SqlException.To determine that the password has expired, calling the Open method raises a SqlException. Para indicar que se debe restablecer la contraseña incluida en la cadena de conexión, la propiedad Number de la excepción contiene el valor de estado 18487 o 18488.In order to indicate that the password that is contained within the connection string must be reset, the Number property for the exception contains the status value 18487 or 18488. El primer valor (18487) indica que la contraseña ha expirado y la segunda (18488) indica que se debe restablecer la contraseña antes de iniciar sesión.The first value (18487) indicates that the password has expired and the second (18488) indicates that the password must be reset before logging in.

Este método abre su propia conexión con el servidor, solicita el cambio de contraseña y cierra la conexión tan pronto como se haya completado.This method opens its own connection to the server, requests the password change, and closes the connection as soon as it has completed. Esta conexión no se recupera del grupo de conexiones de SQL Server ni se devuelve a este.This connection is not retrieved from, nor returned to, the SQL Server connection pool.

Consulte también:

ChangePassword(String, SqlCredential, SecureString)

Cambia la contraseña de SQL Server para el usuario indicado en el objeto de SqlCredential.Changes the SQL Server password for the user indicated in the SqlCredential object.

public:
 static void ChangePassword(System::String ^ connectionString, System::Data::SqlClient::SqlCredential ^ credential, System::Security::SecureString ^ newSecurePassword);
public static void ChangePassword (string connectionString, System.Data.SqlClient.SqlCredential credential, System.Security.SecureString newSecurePassword);
static member ChangePassword : string * System.Data.SqlClient.SqlCredential * System.Security.SecureString -> unit
Public Shared Sub ChangePassword (connectionString As String, credential As SqlCredential, newSecurePassword As SecureString)

Parámetros

connectionString
String

Cadena de conexión que contiene suficiente información para conectarse a un servidor.The connection string that contains enough information to connect to a server. La cadena de conexión no debe usar ninguna de las palabras clave siguientes de cadena de conexión: Integrated Security = true, UserId o Password; o ContextConnection = true.The connection string should not use any of the following connection string keywords: Integrated Security = true, UserId, or Password; or ContextConnection = true.

credential
SqlCredential

Objeto SqlCredential.A SqlCredential object.

newPassword
SecureString

La contraseña nueva.newPasswordThe new password.newPassword tiene que ser de solo lectura.must be read only. La contraseña también debe cumplir con las directivas de seguridad de contraseña configuradas en el servidor (por ejemplo, la longitud mínima y los requisitos para caracteres específicos).The password must also comply with any password security policy set on the server (for example, minimum length and requirements for specific characters).

Excepciones

La cadena de conexión contiene cualquier combinación de UserId, Password o Integrated Security=true.The connection string contains any combination of UserId, Password, or Integrated Security=true.

O bien,-or- La cadena de conexión contiene Context Connection=true.The connection string contains Context Connection=true.

O bien,-or-

newSecurePassword (o newPassword) tiene más de 128 caracteres.newSecurePassword (or newPassword) is greater than 128 characters.

O bien,-or-

newSecurePassword (o newPassword) no es de solo lectura.newSecurePassword (or newPassword) is not read only.

O bien,-or-

newSecurePassword (o newPassword) es una cadena vacía.newSecurePassword (or newPassword) is an empty string.

Uno o de los parámetros (connectionString, credential o newSecurePassword) es null.One of the parameters (connectionString, credential, or newSecurePassword) is null.

Consulte también:

Se aplica a