MembershipUser.ChangePassword(String, String) Method

Reference

Definition

Namespace:: System.Web.Security

Assembly:: System.Web.dll

Assembly:: System.Web.ApplicationServices.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Updates the password for the membership user in the membership data store.

public:
 virtual bool ChangePassword(System::String ^ oldPassword, System::String ^ newPassword);

public virtual bool ChangePassword (string oldPassword, string newPassword);

abstract member ChangePassword : string * string -> bool
override this.ChangePassword : string * string -> bool

Public Overridable Function ChangePassword (oldPassword As String, newPassword As String) As Boolean

Parameters

oldPassword: String

The current password for the membership user.

newPassword: String

The new password for the membership user.

Returns

Boolean

true if the update was successful; otherwise, false.

Exceptions

ArgumentException

oldPassword is an empty string.

-or-

newPassword is an empty string.

ArgumentNullException

oldPassword is null.

-or-

newPassword is null.

PlatformNotSupportedException

This method is not available. This can occur if the application targets the .NET Framework 4 Client Profile. To prevent this exception, override the method, or change the application to target the full version of the .NET Framework.

Examples

The following code example modifies the password for the current logged-on user.

Important

This example contains a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

public void ChangePassword_OnClick(object sender, EventArgs args)
{
  // Update the password.

  MembershipUser u = Membership.GetUser(User.Identity.Name);

  try
  {
    if (u.ChangePassword(OldPasswordTextbox.Text, PasswordTextbox.Text))
    {
      Msg.Text = "Password changed.";
    }
    else
    {
      Msg.Text = "Password change failed. Please re-enter your values and try again.";
    }
  }
  catch (Exception e)
  {
    Msg.Text = "An exception occurred: " + Server.HtmlEncode(e.Message) + ". Please re-enter your values and try again.";
  }
}


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Change Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Change Password for <%=User.Identity.Name%></h3>

  <asp:Label id="Msg" ForeColor="maroon" runat="server" />

  <table cellpadding="3" border="0">
    <tr>
      <td>Old Password:</td>
      <td><asp:Textbox id="OldPasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="OldPasswordRequiredValidator" runat="server"
                                      ControlToValidate="OldPasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Password:</td>
      <td><asp:Textbox id="PasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordRequiredValidator" runat="server"
                                      ControlToValidate="PasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Confirm Password:</td>
      <td><asp:Textbox id="PasswordConfirmTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordConfirmRequiredValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" />
          <asp:CompareValidator id="PasswordConfirmCompareValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ControlToCompare="PasswordTextBox"
                                      ErrorMessage="Confirm password must match password." />
      </td>
    </tr>
    <tr>
      <td></td>
      <td><asp:Button id="ChangePasswordButton" Text="Change Password" 
                      OnClick="ChangePassword_OnClick" runat="server" /></td>
    </tr>
  </table>
</form>

</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

Public Sub ChangePassword_OnClick(sender As Object, args As EventArgs)
  ' Update the password.

  Dim u As MembershipUser = Membership.GetUser(User.Identity.Name)

  Try
    If u.ChangePassword(OldPasswordTextbox.Text, PasswordTextbox.Text) Then
      Msg.Text = "Password changed."
    Else
      Msg.Text = "Password change failed. Please re-enter your values and try again."
    End If
  Catch e As Exception
    Msg.Text = "An exception occurred: " & Server.HtmlEncode(e.Message) & ". Please re-enter your values and try again."
  End Try

End Sub


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Change Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Change Password for <%=User.Identity.Name%></h3>

  <asp:Label id="Msg" ForeColor="maroon" runat="server" />

  <table cellpadding="3" border="0">
    <tr>
      <td>Old Password:</td>
      <td><asp:Textbox id="OldPasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="OldPasswordRequiredValidator" runat="server"
                                      ControlToValidate="OldPasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Password:</td>
      <td><asp:Textbox id="PasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordRequiredValidator" runat="server"
                                      ControlToValidate="PasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Confirm Password:</td>
      <td><asp:Textbox id="PasswordConfirmTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordConfirmRequiredValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" />
          <asp:CompareValidator id="PasswordConfirmCompareValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ControlToCompare="PasswordTextBox"
                                      ErrorMessage="Confirm password must match password." />
      </td>
    </tr>
    <tr>
      <td></td>
      <td><asp:Button id="ChangePasswordButton" Text="Change Password" 
                      OnClick="ChangePassword_OnClick" runat="server" /></td>
    </tr>
  </table>
</form>

</body>
</html>

Remarks

ChangePassword calls the ChangePassword method of the membership provider referenced by the ProviderName property to update the password for the membership user in the membership data store.

The membership provider may have restrictions on the size of the password. For size limitations, see the documentation for the membership provider.

Applies to

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