c# - ModelState.IsValid 为假但应该为真
问题描述
我有一个带有 AJAX 更新的 ASP.NET MVC 应用程序。除了创建“收据”之外,每个实体的 CRUD 操作都正常工作。当控制器命中时会出现问题,ModelState.IsValid
而实际上它应该是真的。我一步步调试了很多次,应该为真的时候总是假的。
我正在使用 Entity Framework 进行实体操作,这是从 SQL Server 数据库生成的代码:
public partial class Receipt
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public Receipt()
{
this.Receipts1 = new HashSet<Receipt>();
this.Seminars = new HashSet<Seminar>();
}
public int Id { get; set; }
public System.DateTime IssueDate { get; set; }
public Nullable<System.DateTime> DeliveryDate { get; set; }
public Nullable<System.DateTime> PaymentDue { get; set; }
public Nullable<short> CompanyId { get; set; }
public Nullable<int> Number { get; set; }
public Nullable<int> ClosedReceiptId { get; set; }
public Nullable<decimal> ReturnedAmount { get; set; }
public Nullable<short> ReturnTypeId { get; set; }
public virtual Company Company { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Receipt> Receipts1 { get; set; }
public virtual Receipt Receipt1 { get; set; }
public virtual ReturnType ReturnType { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Seminar> Seminars { get; set; }
}
最重要的是我有ReceiptMetadata
注释和[Required]
字段:
[MetadataType(typeof(ReceiptMetadata))]
public partial class Receipt
{
}
public class ReceiptMetadata
{
[Required]
public int Number { get; set; }
[Required]
[DisplayName("Issue Date")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:G}")]
public DateTime IssueDate { get; set; }
[Required]
[DisplayName("Payment Due")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd.MM.yyyy}")]
public DateTime? PaymentDue { get; set; }
[DisplayName("Return amount")]
[DisplayFormat(DataFormatString = "{0:c}")]
public Nullable<decimal> ReturnedAmount { get; set; }
}
我Create
在控制器中的功能如下:
[HttpPost]
[ValidateAntiForgeryToken]
public JsonResult Create([Bind(Include = "Id,IssueDate,DeliveryDate,PaymentDue,CompanyId,Number")]Receipt receipt, int? seminarId)
{
if (seminarId == null)
{
Response.StatusCode = (int)HttpStatusCode.BadRequest;
return Json(new { Message = "ID is required" });
}
Seminar seminar = db.Seminars.Find(seminarId);
if (seminar == null)
{
Response.StatusCode = (int)HttpStatusCode.BadRequest;
return Json(new { Message = "Seminar doesn't exist" });
}
int receiptNumber = db.Receipts.Where(r => r.CompanyId == receipt.CompanyId && r.ClosedReceiptId == null && r.IssueDate.Year == DateTime.Now.Year).Count() + 1;
receipt.Number = receiptNumber;
receipt.IssueDate = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.Now, TimeZoneInfo.Local.Id, "Central European Standard Time");
if (ModelState.IsValid)
{
try
{
db.Receipts.Add(receipt);
db.SaveChanges();
seminar.ReceiptId = receipt.Id;
db.Entry(seminar).State = EntityState.Modified;
db.SaveChanges();
GeneratePDF(receipt.Id, receipt.ReceiptNumber, receipt.CompanyId.ToString());
return Json(new { receipt.Id, receipt.PDFLink, Action = "Create", Message = "Receipt successfully added! -> " }, JsonRequestBehavior.AllowGet);
}
catch (Exception ex)
{
Response.StatusCode = (int)HttpStatusCode.BadRequest;
return Json(new { Message = ex.Message });
}
}
Response.StatusCode = (int)HttpStatusCode.BadRequest;
IEnumerable<ModelError> allErrors = ModelState.Values.SelectMany(v => v.Errors);
List<string> errorMessages = new List<string>();
foreach (ModelError error in allErrors)
{
errorMessages.Add(error.ErrorMessage);
}
return Json(new { Message = errorMessages });
}
我得到的错误是
数字字段是必需的。
当清楚地Number
填写该字段时:
receipt.Number = receiptNumber;
前几行IsValid
。
有人可以帮忙吗?
编辑:这是调试的屏幕截图,模型状态键完全错误:
解决方案
输入您的操作时,ModelState 已经被评估(并且无效),设置“数字”属性不会再次评估模型。设置属性后,您可能必须通过编写以下代码手动将其从模型错误中删除:
ModelState.Remove("Number");
推荐阅读
- json - jq 读取内联字符串,而不是从标准输入
- c++ - 设置 Qt::FramelessWindowHint 时隐藏阴影
- python - 在 Python 中使用 pandas 解析日期失败
- vue.js - 通过扩展运算符奇怪的行为创建的对象
- python - 将具有多个逗号分隔标签的 DF 列解析为各个列
- python-3.x - 此 SVC 实例尚未安装。在使用此方法之前使用适当的参数调用“fit”
- python - 我想让这个程序循环
- node.js - 我的 Express 应用程序中任何参数的 req.body 都返回未定义
- python - 无法从 PyQt Designer 的代码构建 GUI
- angular - 在打字稿中循环表单数据