C# 如何将ASP.NET MVC5错误消息重新格式化为仅显示C中的第一条消息#
我有以下代码,我认为这些代码将向我显示模型中的每个错误:C# 如何将ASP.NET MVC5错误消息重新格式化为仅显示C中的第一条消息#,c#,asp.net-mvc,asp.net-mvc-5,C#,Asp.net Mvc,Asp.net Mvc 5,我有以下代码,我认为这些代码将向我显示模型中的每个错误: @if (!ViewData.ModelState.IsValid) { <ul> @foreach (string key in ViewData.ModelState.Keys) { @foreach (var error in ViewData.ModelState[key].Errors) { <li>@error.ErrorM
@if (!ViewData.ModelState.IsValid)
{
<ul>
@foreach (string key in ViewData.ModelState.Keys)
{
@foreach (var error in ViewData.ModelState[key].Errors)
{
<li>@error.ErrorMessage</li>
}
}
</ul>
}
@if(!ViewData.ModelState.IsValid)
{
@foreach(ViewData.ModelState.Keys中的字符串键)
{
@foreach(ViewData.ModelState[key]中的var错误。错误)
{
- @error.ErrorMessage
}
}
}
代码是嵌入在网页中的C#。有人能告诉我,我怎样才能报告第一条消息,并在
中报告这条消息
以及助手实现:
public static class HtmlHelpers
{
public static IHtmlString FirstModelError(this HtmlHelper html)
{
var modelState = html.ViewData.ModelState;
if (modelState.IsValid)
{
return MvcHtmlString.Empty;
}
var span = new TagBuilder("span");
string errorMessage = modelState
.First(x => x.Value.Errors.Any())
.Value
.Errors
.First()
.ErrorMessage;
span.SetInnerText(errorMessage);
return new HtmlString(span.ToString());
}
}
以及助手实现:
public static class HtmlHelpers
{
public static IHtmlString FirstModelError(this HtmlHelper html)
{
var modelState = html.ViewData.ModelState;
if (modelState.IsValid)
{
return MvcHtmlString.Empty;
}
var span = new TagBuilder("span");
string errorMessage = modelState
.First(x => x.Value.Errors.Any())
.Value
.Errors
.First()
.ErrorMessage;
span.SetInnerText(errorMessage);
return new HtmlString(span.ToString());
}
}
public static class HtmlHelpers
{
public static IHtmlString FirstModelError(this HtmlHelper html)
{
var modelState = html.ViewData.ModelState;
if (modelState.IsValid)
{
return MvcHtmlString.Empty;
}
var span = new TagBuilder("span");
string errorMessage = modelState
.First(x => x.Value.Errors.Any())
.Value
.Errors
.First()
.ErrorMessage;
span.SetInnerText(errorMessage);
return new HtmlString(span.ToString());
}
}