[英]ASP.NET MVC - ModelState is invalid but form content is acessible
I am trying to pass some input from the "Create" view to my controller but the ModelState is returning error:我正在尝试将“创建”视图中的一些输入传递给我的控制器,但 ModelState 返回错误:
The Controller:控制器:
[Route("Create")]
[HttpPost]
[ValidateAntiForgeryToken]
public IActionResult Create([Bind("Name, Location, MaxCapacity")] Warehouse warehouse)
{
if (ModelState.IsValid)
{
_Db.Add(warehouse);
_Db.SaveChanges();
return RedirectToAction("Index");
}
return BadRequest();
}
The view:风景:
@model InventoryManSys.Models.Warehouse
@{
ViewData["Title"] = "Create";
}
<h1>Create</h1>
<h4>Warehouse</h4>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="Name" class="control-label"></label>
<input asp-for="Name" class="form-control" />
<span asp-validation-for="Name" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Location" class="control-label"></label>
<input asp-for="Location" class="form-control" />
<span asp-validation-for="Location" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="MaxCapacity" class="control-label"></label>
<input asp-for="MaxCapacity" class="form-control" />
<span asp-validation-for="MaxCapacity" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-primary" />
</div>
</form>
</div>
</div>
The model:该模型:
public class Warehouse
{
[Key]
public int Id { get; set; }
[Required]
[StringLength(30, ErrorMessage = "Name should have less than 30 characters")]
[DisplayName("Warehouse Name")]
public string Name { get; set; }
[Required]
public string Location { get; set; }
[Required]
public int MaxCapacity { get; set; }
//Navigation Property
public ICollection<Category> Categories { get; set; }
}
But when I do a "Console.WriteLine(warehouse.Name)" the input is being passed correctly.但是当我执行“Console.WriteLine(warehouse.Name)”时,输入被正确传递。 How to solve that?如何解决? is the "bind[]"attribute a problem? “bind[]”属性有问题吗?
ModelState is invalid but form content is acessible ModelState 无效,但可以访问表单内容
You may add the client validation js library jquery.validate.js
and jquery.validate.unobtrusive.js
.您可以添加客户端验证 js 库jquery.validate.js
和jquery.validate.unobtrusive.js
。
Check this document:检查这个文件:
https://docs.microsoft.com/en-us/aspnet/core/mvc/models/validation?view=aspnetcore-6.0#client-side-validation https://docs.microsoft.com/en-us/aspnet/core/mvc/models/validation?view=aspnetcore-6.0#client-side-validation
If Name
/ Location
/ MaxCapacity
are received value, it should work fine, suggest you can check the ModelState
or just return BadRequest(ModelState);
如果接收到Name
/ Location
/ MaxCapacity
值,它应该可以正常工作,建议您可以检查ModelState
或只return BadRequest(ModelState);
to see what's the detailed error.看看详细的错误是什么。
But if you use .NET 6 , as this document said:但是,如果您使用 .NET 6 ,如本文档所述:
Beginning with .NET 6, new projects include the
<Nullable>enable</Nullable>
element in the project file.从 .NET 6 开始,新项目在项目文件中包含<Nullable>enable</Nullable>
元素。 Once the feature is turned on, existing reference variable declarations become non-nullable reference types .开启该功能后,现有的引用变量声明将变为不可为空的引用类型。
So that the non-nullable property must be required in ASP.NET 6, otherwise the ModelState will be invalid.因此在 ASP.NET 6 中必须要求不可为空的属性,否则 ModelState 将无效。
One way is to remove <Nullable>enable</Nullable>
from your project file.一种方法是从项目文件中删除<Nullable>enable</Nullable>
。
Another way is to add ?
另一种方法是添加?
like below:如下所示:
public class Warehouse
{
[Key]
public int? Id { get; set; }
[Required]
[StringLength(30, ErrorMessage = "Name should have less than 30 characters")]
[DisplayName("Warehouse Name")]
public string Name { get; set; }
[Required]
public string Location { get; set; }
[Required]
public int MaxCapacity { get; set; }
//Navigation Property
public ICollection<Category>? Categories { get; set; }
}
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