我正在创建一个 Xaml/C# 应用程序，我希望它能够弹出登录提示。
我想知道是否可以使用 CredUIPromptForWindowsCredentials。
- 显示 Windows 安全对话框
- 获取输入的用户名和密码
- 执行自定义验证
- 如果验证成功 -> 继续应用
- 否则如果验证失败 -> -通知用户用户名或密码无效
我已经看过了Windows 安全登录表单？ https://stackoverflow.com/questions/5422140/windows-security-login-form and http://www.pinvoke.net/default.aspx/credui/creduipromptforwindowscredentials.html?diff=y http://www.pinvoke.net/default.aspx/credui/creduipromptforwindowscredentials.html?diff=y但他们没有解释如何处理验证。
我真的很喜欢一个小例子，如果用户输入用户名=“Bo”和密码=“123”，则成功，否则显示错误消息并允许用户重试。
该应用程序将安装在多台计算机上。
或者这根本不可能？
Update
受到这个问题答案的启发在 Windows Vista/7 的 C# 中显示身份验证对话框 https://stackoverflow.com/questions/4134882/show-authentication-dialog-in-c-sharp-for-windows-vista-7
我已修改代码以按预期工作。
请注意，验证部分仅用于概念证明。
WindowsSecurityDialog.cs
public class WindowsSecurityDialog
{
public string CaptionText { get; set; }
public string MessageText { get; set; }
[DllImport("ole32.dll")]
public static extern void CoTaskMemFree(IntPtr ptr);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct CREDUI_INFO
{
public int cbSize;
public IntPtr hwndParent;
public string pszMessageText;
public string pszCaptionText;
public IntPtr hbmBanner;
}
[DllImport("credui.dll", CharSet = CharSet.Auto)]
private static extern bool CredUnPackAuthenticationBuffer(int dwFlags,
IntPtr pAuthBuffer,
uint cbAuthBuffer,
StringBuilder pszUserName,
ref int pcchMaxUserName,
StringBuilder pszDomainName,
ref int pcchMaxDomainame,
StringBuilder pszPassword,
ref int pcchMaxPassword);
[DllImport("credui.dll", CharSet = CharSet.Auto)]
private static extern int CredUIPromptForWindowsCredentials(ref CREDUI_INFO notUsedHere,
int authError,
ref uint authPackage,
IntPtr InAuthBuffer,
uint InAuthBufferSize,
out IntPtr refOutAuthBuffer,
out uint refOutAuthBufferSize,
ref bool fSave,
int flags);
public bool ValidateUser()
{
var credui = new CREDUI_INFO
{
pszCaptionText = CaptionText,
pszMessageText = MessageText
};
credui.cbSize = Marshal.SizeOf(credui);
uint authPackage = 0;
IntPtr outCredBuffer;
uint outCredSize;
bool save = false;
const int loginErrorCode = 1326; //Login Failed
var authError = 0;
while (true)
{
var result = CredUIPromptForWindowsCredentials(ref credui,
authError,
ref authPackage,
IntPtr.Zero,
0,
out outCredBuffer,
out outCredSize,
ref save,
1 /* Generic */);
var usernameBuf = new StringBuilder(100);
var passwordBuf = new StringBuilder(100);
var domainBuf = new StringBuilder(100);
var maxUserName = 100;
var maxDomain = 100;
var maxPassword = 100;
if (result == 0)
{
if (CredUnPackAuthenticationBuffer(0, outCredBuffer, outCredSize, usernameBuf, ref maxUserName,
domainBuf, ref maxDomain, passwordBuf, ref maxPassword))
{
//TODO: ms documentation says we should call this but i can't get it to work
//SecureZeroMem(outCredBuffer, outCredSize);
//clear the memory allocated by CredUIPromptForWindowsCredentials
CoTaskMemFree(outCredBuffer);
var networkCredential = new NetworkCredential()
{
UserName = usernameBuf.ToString(),
Password = passwordBuf.ToString(),
Domain = domainBuf.ToString()
};
//Dummy Code replace with true User Validation
if (networkCredential.UserName == "Bo" && networkCredential.Password == "1234")
return true;
else //login failed show dialog again with login error
{
authError = loginErrorCode;
}
}
}
else return false;
}
}
}
应用程序.xaml.cs
protected override void OnStartup(StartupEventArgs e)
{
var windowsSecurityDialog = new WindowsSecurityDialog
{
CaptionText = "Enter your credentials",
MessageText = "These credentials will be used to connect to YOUR APP NAME";
};
if (windowsSecurityDialog.ValidateUser())
base.OnStartup(e);
}
