调用POST方法时,ASP.NET MVC模型属性为null
在控制器操作中,我有以下调用,调用POST方法时,ASP.NET MVC模型属性为null,asp.net,asp.net-mvc,asp.net-identity,Asp.net,Asp.net Mvc,Asp.net Identity,在控制器操作中,我有以下调用,userId是一个已知的非空值: return View("ChangePassword", new ChangePasswordBindingModel(userId)); 以下是ChangePasswordBindingModel的定义: public class ChangePasswordBindingModel { private string currentUserId; [Required] [DataType(DataTyp
userId
是一个已知的非空值:
return View("ChangePassword", new ChangePasswordBindingModel(userId));
以下是ChangePasswordBindingModel的定义:
public class ChangePasswordBindingModel
{
private string currentUserId;
[Required]
[DataType(DataType.Password)]
//[Display(Name = "Current password")]
public string OldPassword { get; set; }
[Required]
//[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "New password")]
public string NewPassword { get; set; }
[Required]
[DataType(DataType.Password)]
//[Display(Name = "Confirm new password")]
[Compare("NewPassword", ErrorMessage = "The new password and confirmation password do not match.")]
public string ConfirmPassword { get; set; }
public ChangePasswordBindingModel()
{
}
public ChangePasswordBindingModel(string userId)
{
this.currentUserId = userId;
}
public string GetUserId()
{
return this.currentUserId;
}
}
以下是为ChangePassword绑定到此模型的视图:
@model IdentityDevelopment.Models.ChangePasswordBindingModel
@{ ViewBag.Title = "ChangePassword";
}
@Html.ValidationSummary(false)
<h2>Change Password</h2>
@using (Html.BeginForm("ChangePassword","Account", FormMethod.Post))
{
@Html.AntiForgeryToken();
<input type="hidden" name="returnUrl" value="@ViewBag.returnUrl" />
<div class="form-group">
<label>Current Password</label>
@Html.PasswordFor(x => x.OldPassword, new { @class = "form-control" })
</div>
<div class="form-group">
<label>New Password</label>
@Html.PasswordFor(x => x.NewPassword, new { @class = "form-control" })
</div>
<div class="form-group">
<label>Re-enter New Password</label>
@Html.PasswordFor(x => x.ConfirmPassword, new { @class = "form-control" })
</div>
<!-- <button class="btn btn-primary" type="submit">Save</button> -->
<input class="btn btn-primary" type="submit" value="Save" />
}
问题是,
userid
没有设置为非空值,正如我所想的那样。为什么发送到post方法的模型的currentUserId
属性不包含该值?我通过在调试期间单步调用GetUserId()
确认了这一点。currentUserId
未提交到操作后方法,原因有两个:
currentUserId
不是公共属性中,使用
中的(Html.BeginForm
块、
或
标记currentUserId
并在模型中创建名为currentUserId
的新公共属性。您也不需要GetUserId()
方法。您的模型应如下所示
public class ChangePasswordBindingModel
{
[Required]
[DataType(DataType.Password)]
//[Display(Name = "Current password")]
public string OldPassword { get; set; }
[Required]
//[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "New password")]
public string NewPassword { get; set; }
[Required]
[DataType(DataType.Password)]
//[Display(Name = "Confirm new password")]
[Compare("NewPassword", ErrorMessage = "The new password and confirmation password do not match.")]
public string ConfirmPassword { get; set; }
public string CurrentUserId { get; set; }
public ChangePasswordBindingModel()
{
}
public ChangePasswordBindingModel(string userId)
{
this.CurrentUserId = userId;
}
}
并使用HiddenField在视图中包含CurrentUserId
@using (Html.BeginForm("ChangePassword","Account", FormMethod.Post))
{
@Html.AntiForgeryToken();
@Html.HiddenFor(x => x.CurrentUserId)
<input type="hidden" name="returnUrl" value="@ViewBag.returnUrl" />
<div class="form-group">
<label>Current Password</label>
@Html.PasswordFor(x => x.OldPassword, new { @class = "form-control" })
</div>
<div class="form-group">
<label>New Password</label>
@Html.PasswordFor(x => x.NewPassword, new { @class = "form-control" })
</div>
<div class="form-group">
<label>Re-enter New Password</label>
@Html.PasswordFor(x => x.ConfirmPassword, new { @class = "form-control" })
</div>
<!-- <button class="btn btn-primary" type="submit">Save</button> -->
<input class="btn btn-primary" type="submit" value="Save" />
}
currentUserId
是一个私有成员,而不是属性。它不绑定到视图中的任何表单字段。因此,当您通过传递一个非空值为currentUserId
的模型来呈现视图时,该值在客户端呈现视图时立即丢失,因为它只存在于服务器上的模型中。因此没有办法把它拿回来
您可以创建一个
CurrentUserId
属性,并使用Html.HiddenFor()
在视图中创建一个隐藏字段,以便将该值发送到客户端,然后在POST期间将其返回。首先将CurrentUserId公开,然后将其放入视图中的隐藏字段中
@Html.HiddenFor(x => x.currentUserId )
我认为您需要将currentUserId字段公开,以便对其进行JSON序列化,并将其包含在razor标记中,以便从client@Sam.C是的,谢谢,这是基于有效答案的高级视图。谢谢解释。谢谢帮助。
result = await UserManager.ChangePasswordAsync(loginChange.CurrentUserId, loginChange.OldPassword, loginChange.NewPassword);
@Html.HiddenFor(x => x.currentUserId )