身份验证设置为 Windows，并且 roleManager 使用 AspNetWindowsTokenRoleProvider。这是一个内部网应用程序。
我创建了几个不同的测试帐户（Web 服务器的本地帐户）来测试应用程序的不同角色。每个用户属于不同的本地组，每个组在应用程序中是不同的角色。我想为用户提供一个选择选项以在帐户之间切换。
理想情况下，我希望网页上有一个下拉框，其中包含以下类型的选项供用户选择：
如果这不可能，下一个最好的办法是提示用户输入用户名/密码并在服务器上对其进行身份验证，以使用提供的凭据建立新会话。我有哪些选择？谢谢。
我想我想通了这一点。我的解决方案是通过下拉框的选择设置一个cookie并刷新页面。读取Application_AuthenticateRequest事件的 cookie 值，并在HttpContext.User需要时将其替换为请求的用户。这是代码：
像这样选择用户：
<select id="LoginUser" name="LoginUser" onchange="ChangeLoginUser(this)">
<option value="NONE">-- Change User --</option>
<option value="">Windows User</option>
<option value="UserOne">User One</option>
<option value="UserTwo">User Two</option>
</select>
使用 javascript 处理用户选择（AppPath 参考）
function ChangeLoginUser(sel) {
var selectedUser = sel.options[sel.selectedIndex].value;
if (selectedUser == "NONE") return;
$.cookie("LoginUser", selectedUser, { path: AppPath });
location.reload(true); //refresh
}
通过选择覆盖当前登录的 Windows 用户：
protected void Application_AuthenticateRequest(Object sender, EventArgs e)
{
OverrideLoginUser();
}
private void OverrideLoginUser()
{
HttpCookie authCookie = Context.Request.Cookies["LoginUser"];
if (authCookie == null || string.IsNullOrWhiteSpace(authCookie.Value))
return; //regular authentication
if (User != null && User.Username().Equals(authCookie.Value))
return; //already set
Context.User = GetTestUser(authCookie.Value);
}
private WindowsPrincipal GetTestUser(string user)
{
WindowsPrincipal testuser = null;
IntPtr hToken;
if (WinSec.LogonUser(user, "", "ThePassword", // all users have the same password
(int)LogonType.LOGON32_LOGON_INTERACTIVE, (int)LogonProvider.LOGON32_PROVIDER_DEFAULT, out hToken))
{
testuser = new WindowsPrincipal(new WindowsIdentity(hToken, "WindowsAuthentication"));
}
if (hToken != IntPtr.Zero) WinSec.CloseHandle(hToken);
}
if (testuser == null)
throw new Exception("Error getting test user");
return testuser;
}
用户名（）扩展
public static string Username(this IPrincipal user)
{
var name = user.Identity.Name;
//remove domain name
name = Regex.Replace(name, ".*\\\\(.*)", "$1", RegexOptions.None);
return name;
}
UserLogon 功能需要由以下类提供
/// <summary>
/// http://pinvoke.net/default.aspx/advapi32.LogonUser
/// </summary>
public class WinSec
{
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool LogonUser(
string lpszUsername,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
out IntPtr phToken
);
[DllImport("advapi32.dll", SetLastError = true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle, int SECURITY_IMPERSONATION_LEVEL, out IntPtr DuplicateTokenHandle);
[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool CloseHandle(IntPtr hObject);
}
public enum LogonType
{
/// <summary>
/// This logon type is intended for users who will be interactively using the computer, such as a user being logged on
/// by a terminal server, remote shell, or similar process.
/// This logon type has the additional expense of caching logon information for disconnected operations;
/// therefore, it is inappropriate for some client/server applications,
/// such as a mail server.
/// </summary>
LOGON32_LOGON_INTERACTIVE = 2,
/// <summary>
/// This logon type is intended for high performance servers to authenticate plaintext passwords.
/// The LogonUser function does not cache credentials for this logon type.
/// </summary>
LOGON32_LOGON_NETWORK = 3,
/// <summary>
/// This logon type is intended for batch servers, where processes may be executing on behalf of a user without
/// their direct intervention. This type is also for higher performance servers that process many plaintext
/// authentication attempts at a time, such as mail or Web servers.
/// The LogonUser function does not cache credentials for this logon type.
/// </summary>
LOGON32_LOGON_BATCH = 4,
/// <summary>
/// Indicates a service-type logon. The account provided must have the service privilege enabled.
/// </summary>
LOGON32_LOGON_SERVICE = 5,
/// <summary>
/// This logon type is for GINA DLLs that log on users who will be interactively using the computer.
/// This logon type can generate a unique audit record that shows when the workstation was unlocked.
/// </summary>
LOGON32_LOGON_UNLOCK = 7,
/// <summary>
/// This logon type preserves the name and password in the authentication package, which allows the server to make
/// connections to other network servers while impersonating the client. A server can accept plaintext credentials
/// from a client, call LogonUser, verify that the user can access the system across the network, and still
/// communicate with other servers.
/// NOTE: Windows NT: This value is not supported.
/// </summary>
LOGON32_LOGON_NETWORK_CLEARTEXT = 8,
/// <summary>
/// This logon type allows the caller to clone its current token and specify new credentials for outbound connections.
/// The new logon session has the same local identifier but uses different credentials for other network connections.
/// NOTE: This logon type is supported only by the LOGON32_PROVIDER_WINNT50 logon provider.
/// NOTE: Windows NT: This value is not supported.
/// </summary>
LOGON32_LOGON_NEW_CREDENTIALS = 9,
}
public enum LogonProvider
{
/// <summary>
/// Use the standard logon provider for the system.
/// The default security provider is negotiate, unless you pass NULL for the domain name and the user name
/// is not in UPN format. In this case, the default provider is NTLM.
/// NOTE: Windows 2000/NT: The default security provider is NTLM.
/// </summary>
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
}
public enum SecurityImpersonationLevel
{
/// <summary>
/// The server process cannot obtain identification information about the client,
/// and it cannot impersonate the client. It is defined with no value given, and thus,
/// by ANSI C rules, defaults to a value of zero.
/// </summary>
SecurityAnonymous = 0,
/// <summary>
/// The server process can obtain information about the client, such as security identifiers and privileges,
/// but it cannot impersonate the client. This is useful for servers that export their own objects,
/// for example, database products that export tables and views.
/// Using the retrieved client-security information, the server can make access-validation decisions without
/// being able to use other services that are using the client's security context.
/// </summary>
SecurityIdentification = 1,
/// <summary>
/// The server process can impersonate the client's security context on its local system.
/// The server cannot impersonate the client on remote systems.
/// </summary>
SecurityImpersonation = 2,
/// <summary>
/// The server process can impersonate the client's security context on remote systems.
/// NOTE: Windows NT: This impersonation level is not supported.
/// </summary>
SecurityDelegation = 3,
}