ModelState.AddModelError不显示错误 [英] ModelState.AddModelError dosen't show error

问题描述

我项目中的
ModelState.AddModelError不显示错误。当然得到错误但无法显示。



我的控制器：

hi in my project ModelState.AddModelError dosen't show error . of course get error but can't show.

my controller:

[HttpPost]
       public ActionResult Register(tbl_User model)
       {
           if (ModelState.IsValid)
           {
               if (MyClass.IsUserNameDuplicate(model.username) == true)
               {
                   this.ModelState.AddModelError("username", "user name is duplicate");

                   return View(model);
               }
               else
               {
                   MyClass.creatUser(model.username, model.password_User, model.nam);
               }
           }

           return View(model);

       }

我的观点：

my view :

@Html.ValidationSummary(true)
@Html.ValidationMessageFor(model => model.username)
@Html.TextBoxFor(m => m.username, new {@class = "input", @placeholder = "*enter your username" })

推荐答案

您不需要指定密钥。正确如下：

You need to don't specify the key. Correct like this:

ModelState.AddModelError("", "user name is duplicate");

像这样的视图

Like this the view

@Html.ValidationSummary(true, "", new { @class = "text-danger" })

显示错误

display error

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