Question

我正在使用MVC验证来检查是否在数据库中使用名称和密码退出。即使我没有找到任何匹配的用户，ModelState.IsValid也是如此。

if (objModel != null)
{
    if (ModelState.IsValid && Membership.ValidateUser(objUsersModel.UserName, objUsersModel.Password))
    {
        Profile.Initialize(objUsersModel.UserName.Trim(), true);
        FormsAuthentication.SetAuthCookie(objUsersModel.UserName, false);
        return RedirectToAction("Index", "Home");
    }
}

如何将此设置为false并在mvc视图中设置错误消息的值。这是我的MVC视图。

<form role="form">
    <div class="form-group">
        <label for="exampleInputEmail1">User Name </label>
        <i class="fa fa-user"></i>
        @Html.TextBoxFor(m => m.UserName, new { maxlength = 50, @class = "form-control" })
        @Html.ValidationMessageFor(u => u.UserName)
    </div>
    <div class="form-group"> 
        <label for="exampleInputPassword1">Password</label>
        <i class="fa fa-lock"></i>
        @Html.PasswordFor(m => m.Password, new { maxlength = 50, @class = "form-control" })
        @Html.ValidationMessageFor(u => u.Password)
    </div>
    <div class="form-actions">
        <label class="checkbox"> <input type="checkbox" class="uniform" value=""> Remember me</label>
        <button type="submit" class="btn btn-danger">Submit</button>
    </div>
</form>

Answer 1

如果用户名和密码无效，则需要添加ModelState错误并返回视图

if (!ModelState.IsValid)
{
  return View(yourModel);
}
if (!Membership.ValidateUser(objUsersModel.UserName, objUsersModel.Password)
{
  ModelState.AddModelError(string.Empty, "The user name or password is incorrect");
  return View(yourModel);
}
....
return RedirectToAction("Index", "Home");

在视图中，包括

@Html.ValidationSummary(true)

显示消息

使用MVC验证显示无效的用户名或密码

1 个答案: