允许用户登录到API
您需要随请求沿着发送有效的Forms身份验证cookie。此cookie通常由服务器在通过调用[FormsAuthentication.SetAuthCookie方法进行身份验证（LogOn操作）时发送（请参见MSDN）。
因此，客户端需要执行两个步骤：
1.通过发送用户名和密码向LogOn操作发送HTTP请求。这个动作将依次调用FormsAuthentication.SetAuthCookie方法（如果凭证有效），该方法将依次在响应中设置表单身份验证cookie。
1.通过沿着在第一个请求中检索到的表单身份验证cookie，向[Authorize]保护的操作发送HTTP请求。
让我们举个例子。假设您在Web应用程序中定义了2个API控制器：
负责处理身份验证的第一个：

public class AccountController : ApiController
{
    public bool Post(LogOnModel model)
    {
        if (model.Username == "john" && model.Password == "secret")
        {
            FormsAuthentication.SetAuthCookie(model.Username, false);
            return true;
        }

        return false;
    }
}

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第二个包含只有授权用户才能看到的受保护操作：

[Authorize]
public class UsersController : ApiController
{
    public string Get()
    {
        return "This is a top secret material that only authorized users can see";
    }
}

型
现在我们可以编写一个使用此API的客户端应用程序。下面是一个简单的控制台应用程序示例（确保您已经安装了Microsoft.AspNet.WebApi.Client和Microsoft.Net.Http NuGet包）：

using System;
using System.Net.Http;
using System.Threading;

class Program
{
    static void Main()
    {
        using (var httpClient = new HttpClient())
        {
            var response = httpClient.PostAsJsonAsync(
                "http://localhost:26845/api/account", 
                new { username = "john", password = "secret" }, 
                CancellationToken.None
            ).Result;
            response.EnsureSuccessStatusCode();

            bool success = response.Content.ReadAsAsync<bool>().Result;
            if (success)
            {
                var secret = httpClient.GetStringAsync("http://localhost:26845/api/users");
                Console.WriteLine(secret.Result);
            }
            else
            {
                Console.WriteLine("Sorry you provided wrong credentials");
            }
        }
    }
}

型
下面是两个HTTP请求在网络上的样子：
身份验证请求：

POST /api/account HTTP/1.1
Content-Type: application/json; charset=utf-8
Host: localhost:26845
Content-Length: 39
Connection: Keep-Alive

{"username":"john","password":"secret"}

型
验证响应：

HTTP/1.1 200 OK
Server: ASP.NET Development Server/10.0.0.0
Date: Wed, 13 Jun 2012 13:24:41 GMT
X-AspNet-Version: 4.0.30319
Set-Cookie: .ASPXAUTH=REMOVED FOR BREVITY; path=/; HttpOnly
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Content-Type: application/json; charset=utf-8
Content-Length: 4
Connection: Close

true

型
请求保护数据：

GET /api/users HTTP/1.1
Host: localhost:26845
Cookie: .ASPXAUTH=REMOVED FOR BREVITY

型
受保护数据的响应：

HTTP/1.1 200 OK
Server: ASP.NET Development Server/10.0.0.0
Date: Wed, 13 Jun 2012 13:24:41 GMT
X-AspNet-Version: 4.0.30319
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Content-Type: application/json; charset=utf-8
Content-Length: 66
Connection: Close

"This is a top secret material that only authorized users can see"

型

以Android为例。

public abstract class HttpHelper {

private final static String TAG = "HttpHelper";
private final static String API_URL = "http://your.url/api/";

private static CookieStore sCookieStore;

public static String invokePost(String action, List<NameValuePair> params) {
    try {
        String url = API_URL + action + "/";
        Log.d(TAG, "url is" + url);
        HttpPost httpPost = new HttpPost(url);
        if (params != null && params.size() > 0) {
            HttpEntity entity = new UrlEncodedFormEntity(params, "UTF-8");
            httpPost.setEntity(entity);
        }
        return invoke(httpPost);
    } catch (Exception e) {
        Log.e(TAG, e.toString());
    }

    return null;
}

public static String invokePost(String action) {
    return invokePost(action, null);
}

public static String invokeGet(String action, List<NameValuePair> params) {
    try {
        StringBuilder sb = new StringBuilder(API_URL);
        sb.append(action);
        if (params != null) {
            for (NameValuePair param : params) {
                sb.append("?");
                sb.append(param.getName());
                sb.append("=");
                sb.append(param.getValue());
            }
        }
        Log.d(TAG, "url is" + sb.toString());
        HttpGet httpGet = new HttpGet(sb.toString());
        return invoke(httpGet);
    } catch (Exception e) {
        Log.e(TAG, e.toString());
    }

    return null;
}

public static String invokeGet(String action) {
    return invokeGet(action, null);
}

private static String invoke(HttpUriRequest request)
        throws ClientProtocolException, IOException {
    String result = null;
    DefaultHttpClient httpClient = new DefaultHttpClient();

    // restore cookie
    if (sCookieStore != null) {
        httpClient.setCookieStore(sCookieStore);
    }

    HttpResponse response = httpClient.execute(request);

    StringBuilder builder = new StringBuilder();
    BufferedReader reader = new BufferedReader(new InputStreamReader(
            response.getEntity().getContent()));
    for (String s = reader.readLine(); s != null; s = reader.readLine()) {
        builder.append(s);
    }
    result = builder.toString();
    Log.d(TAG, "result is ( " + result + " )");

    // store cookie
    sCookieStore = ((AbstractHttpClient) httpClient).getCookieStore();
    return result;
}

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请注意：localhost不能使用。Android设备将localhost视为自身主机。ii.如果在IIS中部署web API，则必须打开Form认证。

使用此代码并访问数据库

[HttpPost]
[Route("login")]
public IHttpActionResult Login(LoginRequest request)
{
       CheckModelState();
       ApiResponse<LoginApiResponse> response = new ApiResponse<LoginApiResponse>();
       LoginResponse user;
       var count = 0;
       RoleName roleName = new RoleName();
       using (var authManager = InspectorBusinessFacade.GetAuthManagerInstance())
       {
           user = authManager.Authenticate(request); 
       } reponse(ok) 
}

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选择单用户身份验证-这将创建身份验证的数据库，以在App_Data>*.mdf sql文件中创建用户注册的用户存储在此表dbo.AspNetUsers -->请注意，密码以散列格式存储在此表中使用此它将有助于登录具有[Autorize]属性的网站-->它将调用自动创建的页面函数==> /API/account/register
注册页面脚本可以像下面的$（document）.ready（function（）{

$('#lnkClose').click(function () {
             $('#divErrorText').hide('fade');
        });

        $('#btnRegister').click(function () {
            $.ajax({
                url: '/api/account/register',
                method: 'POST',
                data: {
                    Email: $('#txtEmail').val(),
                    Password: $('#txtPassword').val(),
                    ConfirmPassword: $('#txtConfirmPassword').val()

                },
                success: function () {
                    $('#successModel').modal('show');
                },
                error: function (jqXHR) {
                    $('#divErrorText').text(jqXHR.responseText);
                    $('#divError').show('fade');
                    $('#divErrorText').show('fade');
                }
            })


        });
    });

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