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MembershipUser.ChangePassword Method

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

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

public virtual bool ChangePassword(
	string oldPassword,
	string newPassword
)

Parameters

oldPassword
Type: System.String

The current password for the membership user.

newPassword
Type: System.String

The new password for the membership user.

Return Value

Type: System.Boolean
true if the update was successful; otherwise, false.

ExceptionCondition
System.ArgumentException

oldPassword is an empty string.

-or-

newPassword is an empty string.

System.ArgumentNullException

oldPassword is null.

-or-

newPassword is null.

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.

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

Security noteSecurity Note:

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>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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