.Net Core 显示模型验证与验证过滤器 [英] .Net Core display model validation with validation filter
问题描述
我创建了一个基本的 .Net Core Mvc 应用程序,我想为我的所有操作自动设置 ModelState.IsValid 这里是验证过滤器的代码
I created a basic .Net Core Mvc application and I want to automatically set ModelState.IsValid for all my action here is the code of Validation Filter
public class ValidationFilter : IAsyncActionFilter
{
public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
if (!context.ModelState.IsValid)
{
}
await next();
}
}
这是我的操作代码
[HttpPost]
public IActionResult AddUser(LoginRequestViewModel loginRequestViewModel)
{
return View(loginRequestViewModel);
}
我应该返回什么来显示 asp-validation-for 中的错误?不使用任何 javascript 代码..
What should I return to display the errors in the asp-validation-for? Without using any javascript code..
推荐答案
根据你的代码测试,可以实现全局过滤.需要在 startup.cs 中使 ValidationFilter 成为全局过滤器.
According to the test of your code, global filtering can be achieved. Need to make ValidationFilter a global filter in startup.cs.
services.AddControllersWithViews(option=>
{
option.Filters.Add(new ValidationFilter());
});
然后,创建一个模型.
public class LoginRequestViewModel
{
[MinLength(3)]
public string username { get; set; }
public string email { get; set; }
}
在 ValidationFilter 中定义错误消息.
Define error messages in ValidationFilter.
public class ValidationFilter : IAsyncActionFilter
{
public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
if (!context.ModelState.IsValid)
{
//Customize your error message
string messages = string.Join("; ",context.ModelState.Values
.SelectMany(x => x.Errors)
.Select(x => !string.IsNullOrWhiteSpace(x.ErrorMessage) ? x.ErrorMessage : x.Exception.Message.ToString()));
context.RouteData.Values.Add("mes", messages);
}
await next();
}
}
在行动中,获取 RouteData.
In action, get RouteData.
[HttpPost]
public IActionResult AddUser(LoginRequestViewModel loginRequestViewModel)
{
ViewData["error"]= RouteData.Values["mes"];
return View(loginRequestViewModel);
}
创建 AddUser.cshtml 并使用表单.
Create AddUser.cshtml and use form.
@model solution921.Controllers.LoginRequestViewModel
<form action="/home/AddUser" method="post">
@ViewData["error"]
<input type="text" name="username" value="" />
<span asp-validation-for="username"></span>
<input type="text" name="email" value="" />
<input type="submit" name="" value="sub" />
</form>
它可以返回正确的验证.
It can return correct validation.
这篇关于.Net Core 显示模型验证与验证过滤器的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!