谷歌Oauth2登录

Question

在ASP.NET中使用C＃的Windows窗体应用程序，我正在寻找通过谷歌提供登录功能a/c Oauth2。任何机构能否帮助我解决一些问题或链接问题？

Answer 1

您可以在这里找到一个例子：/ - google-api-dotnet-client - Google APIs Client Library for .NET - Google Project Hosting

Answer 2

3 type login with OAuth2. 

private async Task SignInAsync(User user, bool isPersistent) 
    { 
     AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie); 
     var identity = await _userManager.CreateIdentityAsync(user, DefaultAuthenticationTypes.ApplicationCookie); 
AuthenticationManager.SignIn(new AuthenticationProperties() {IsPersistent = isPersistent }, identity); 
    } 
    [HttpPost] 
    [AllowAnonymous] 
    [ValidateAntiForgeryToken] 
    public async Task<ActionResult> Login(LoginViewModel model, string returnUrl) 
    { 
     if (ModelState.IsValid) 
     { 
      var user = await _userManager.FindAsync(model.UserName, model.Password); 

      //Update : here we need to optimize code , because we have many roles and logins. 
      //According to role we need to open Dashboards. 

      if (user != null) 
      { 
       IList<string> roles = await _userManager.GetRolesAsync(user.Id); 
       if (roles.Count != 0) 
       { 
        this.SessionState.ThemeName = user.ThemeName; 
        this.SessionState.UserId = user.Id; 
        this.SessionState.CustomerId = user.CustomerId.ToString(); 
        this.SessionState.UserRole = roles.FirstOrDefault().ToString(); 
if (SessionState.UserRole == UserRoleNames.ClinicAdmin || SessionState.UserRole == UserRoleNames.ClinicStaff || SessionState.UserRole == UserRoleNames.Patient) 
        { 
         this.SessionState.SiteId = user.SiteId.ToString(); 
        } 
        else 
        { 
         this.SessionState.SiteId = null; 
        } 


        await SignInAsync(user, model.RememberMe); 
        return RedirectToLocal(returnUrl); 
       } 
       else 
       { 
        ModelState.AddModelError("", "Your account is not activate ,Please contact administrator"); 
       } 
      } 
      else 
      { 
       ModelState.AddModelError("", "Invalid username or password."); 
      } 
     } 
     return this.AjaxableView(model); 
    } 
[HttpPost] 
    [AllowAnonymous] 
    [ValidateAntiForgeryToken] 
    public async Task<ActionResult> ExternalLoginConfirmation(ExternalLoginConfirmationViewModel model, string returnUrl) 
    { 
     if (User.Identity.IsAuthenticated) 
     { 
      return RedirectToAction("Manage"); 
     } 

     if (ModelState.IsValid) 
     { 
      // Get the information about the user from the external login provider 
      var info = await AuthenticationManager.GetExternalLoginInfoAsync(); 
      if (info == null) 
      { 
       return this.AjaxableView("ExternalLoginFailure"); 
      } 
      var user = new User() { UserName = model.UserName }; 
      var result = await _userManager.CreateAsync(user); 
      if (result.Succeeded) 
      { 
       result = await _userManager.AddLoginAsync(user.Id, info.Login); 
       if (result.Succeeded) 
       { 
        await SignInAsync(user, isPersistent: false); 
        return RedirectToLocal(returnUrl); 
       } 
      } 
      AddErrors(result); 
     } 

     ViewBag.ReturnUrl = returnUrl; 
     return this.AjaxableView(model); 
    } 


    // GET: /Account/ExternalLoginCallback 
    [AllowAnonymous] 
    public async Task<ActionResult> ExternalLoginCallback(string returnUrl) 
    { 
     var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync(); 
     if (loginInfo == null) 
     { 
      return RedirectToAction("Login"); 
     } 
     var user = await _userManager.FindAsync(loginInfo.Login); 
     if (user != null) 
     { 
      await SignInAsync(user, isPersistent: false); 
      return RedirectToLocal(returnUrl); 
     } 
     else 
     { 
      ViewBag.ReturnUrl = returnUrl; 
      ViewBag.LoginProvider = loginInfo.Login.LoginProvider; 
      return this.AjaxableView("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel { UserName = loginInfo.DefaultUserName }); 
     } 
    }