[英]ValidationSummary does not display error
I cannot get a custom error to appear in my ValidationSummary. 我无法在ValidationSummary中显示自定义错误。 (Property-level errors display correctly, as expected.)
(正如预期的那样,属性级错误会正确显示。)
Controller: 控制器:
[HttpPost]
public async Task<ActionResult> Contact(ContactViewModel model)
{
if (ModelState.IsValid)
{
try
{
Mail mail = new Mail
{
ToAddress = "user@example.com",
Subject = model.Subject,
Body = model.Message
};
if (!string.IsNullOrWhiteSpace(model.Email))
mail.FromAddress = model.Email;
await mail.SendAsync();
return View("ContactConfirm");
}
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, ex);
}
}
return View(model);
}
View: 视图:
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
I can step through my code and see that the line ModelState.AddModelError(string.Empty, ex);
我可以单步执行我的代码,看看行
ModelState.AddModelError(string.Empty, ex);
is executed, and there is a valid error, but the markup does not render any error message. 执行,并且存在有效错误,但标记不会呈现任何错误消息。
NOTE: While nothing is visible on the page, the underlying markup for the validation summary is as follows: 注意:虽然页面上看不到任何内容,但验证摘要的基础标记如下:
<div class="validation-summary-errors text-danger">
<ul>
<li style="display:none"></li>
</ul>
</div>
Can anyone help me figure out why my error is not displayed? 任何人都可以帮我弄清楚为什么我的错误没有显示?
The problem is here: 问题出在这里:
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, ex);
}
Since one of the overloads accepted an Exception
, I assumed the text would be correctly extracted from the exception that I provided. 由于其中一个重载接受了
Exception
,我假设文本将从我提供的异常中正确提取。 But it isn't. 但事实并非如此。
Making the following change causes the error to be displayed correctly in the validation summary. 进行以下更改会导致错误在验证摘要中正确显示。
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, ex.Message);
}
You probably want to change the first parameter to false: 您可能希望将第一个参数更改为false:
@Html.ValidationSummary(false, "", new { @class = "text-danger" })
It specifies whether to exclude property errors. 它指定是否排除属性错误。
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