ASP.NET Core Identity 登录功能的实现

三大块：

• LoginViewModel
• Login 视图
• Login 操作方法

ViewModel：

public class LoginViewModel
{
    [Required]
    [EmailAddress]
    [Display(Name = "邮箱地址")]
    public string Email { get; set; }
    [Required]
    [DataType(DataType.Password)]
    [Display(Name = "密码")]
    public string Password { get; set; }
    [Display(Name = "记住我")]
    public bool RememberMe { get; set; }
}

Login 视图：

@model LoginViewModel
@{
    ViewBag.Title = "用户登录";
}
<h1>用户登录</h1>
<div class="row">
    <div class="col-md-12">
        <form method="post">
            <div asp-validation-summary="All" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Email"></label>
                <input asp-for="Email" class="form-control" />
                <span asp-validation-for="Email" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Password"></label>
                <input asp-for="Password" class="form-control" />
                <span asp-validation-for="Password" class="text-danger"></span>
            </div>
            <div class="form-group">
                <div class="custom-checkbox">
                    <label asp-for="RememberMe">
                        <input asp-for="RememberMe"/>@Html.DisplayNameFor(m => m.RememberMe)
                    </label>
                </div>
            </div>
            <button type="submit" class="btn btn-primary">登录</button>
        </form>
    </div>
</div>

Login 操作方法：

[HttpGet]
public IActionResult Login()
{
    return View();
}
[HttpPost]
public async Task<IActionResult> Login(LoginViewModel model)
{
    if (ModelState.IsValid)
    {
        var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, false);
        if (result.Succeeded)
        {
            return RedirectToAction("Index", "Home");
        }
        ModelState.AddModelError(string.Empty, "登录失败，请重试");
    }
    return View(model);
}