Mvc 远程属性正在查询字符串中发送“未定义”

本文关键字:未定义 字符串 查询 程属性 属性 Mvc | 更新日期: 2023-09-27 17:56:25

我正在尝试远程验证一些代码,对于参数,它作为参数传递undefined。这是我的验证码:

[OutputCache(Location = OutputCacheLocation.None, NoStore = true)]
public class ValidationController : Controller
{
    public JsonResult IsUserNameAvailable(string userName, int? UserId)
    {
        var users = new BusinessLayer.BdsAdmin.Users();
        if (UserId == null || UserId == 0)
            // Do something
        else // Do something else
        if (users.Count == 0)
        {
            return Json(true, JsonRequestBehavior.AllowGet);
        }
        string msg = string.Format("{0} is already taken and is not available.", userName);
        return Json(msg, JsonRequestBehavior.AllowGet);
    }
}

这是我的模型:

public class EditUserAdministrationViewModel
{
    public int UserId { get; set; }
    [Required(ErrorMessage = "You must enter a user name.")]
    [Display(Name = "User Name")]
    [Remote("IsUserNameAvailable", "Validation", AdditionalFields = "UserId")]
    public string UserName { get; set; }
    // More properties
}

看看Fiddler中的请求,这是我看到的:

GET /Validation/IsUserNameAvailable?UserName=sara&UserId=undefined

为什么 MVC 将字符串undefined注入到请求中,而不是实际的 UserId?

Mvc 远程属性正在查询字符串中发送“未定义”

你需要添加

  @Html.HiddenFor(m=>m.UserId) 

在视图中,以便绑定程序将其绑定到远程验证控制器,否则没有要绑定的值