我想知道即使該字段不為空，必需屬性也會在 Edit 中自動觸發的可能原因是什么？這是我的代碼：查看模型public class ExpensesViewModel{ public int Id { get; set; } [Required] [StringLength(4, MinimumLength = 4)] [Remote(action: "IsExpenseCodeValid", controller: "Expenses", AdditionalFields = "Id", ErrorMessage = "Expense Code already taken, please try different")] public string Expense_Code { get; set; } [Required] public string Expense_Name { get; set; } public string Category { get; set; } public string Updated_By { get; set; }}編輯.cshtml代碼： @*@model QnE_Accounting.Models.MasterModels.Expenses*@@model QnE_Accounting.Models.MasterViewModels.ExpensesViewModel@{ ViewData["Title"] = "Edit";}<h2>Edit</h2><h4>Expenses</h4><hr /><div class="row"> <div class="col-md-4"> <form asp-action="Edit"> <div asp-validation-summary="ModelOnly" class="text-danger"></div> <input type="hidden" asp-for="Id" /> <div class="form-group"> <label asp-for="Expense_Code" class="control-label"></label> <input asp-for="Expense_Code" class="form-control" /> <span asp-validation-for="Expense_Code" class="text-danger"></span> </div> etc..并從控制器編輯：// GET: Expenses/Edit/5 public async Task<IActionResult> Edit(int? id, ExpensesViewModel vmodel) { if (id == null) { return NotFound(); } var expenses = await _context.Expenses.SingleOrDefaultAsync(m => m.Id == id); if (expenses == null) { return NotFound(); } else { vmodel.Id = expenses.Id; vmodel.Expense_Code = expenses.Expense_Code; vmodel.Expense_Name = expenses.Expense_Name; vmodel.Category = expenses.Category; } return View(vmodel); }更新，示例屏幕截圖：示例屏幕截圖我怎樣才能解決這個問題？我錯過了什么嗎？
2 回答
有只小跳蛙
TA貢獻1824條經驗 獲得超8個贊
您需要創建一個 Edit 方法來處理 Post
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Edit(int? id, ExpensesViewModel vmodel)
{
... perform edit
}
陪伴而非守候
TA貢獻1757條經驗 獲得超8個贊
通過刪除 viewmodel 參數并在函數中聲明來解決此問題，謝謝
// GET: Expenses/Edit/5
public async Task<IActionResult> Edit(int? id)
//public async Task<IActionResult> Edit(int? id)
{
if (id == null)
{
return NotFound();
}
var expenses = await _context.Expenses.SingleOrDefaultAsync(m => m.Id == id);
//if (expenses == null)
//{
// return NotFound();
//}
//return View(expenses);
ExpensesViewModel vmodel = new ExpensesViewModel();
if (expenses == null)
{
return NotFound();
}
else
{
vmodel.Id = expenses.Id;
vmodel.Expense_Code = expenses.Expense_Code;
vmodel.Expense_Name = expenses.Expense_Name;
vmodel.Category = expenses.Category;
}
return View(vmodel);
}
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