C# MVC4-实体框架、视图模型和验证
我正在为一个项目使用MVC4和实体框架。我有一个创建产品视图,它是用产品视图模型强类型的:C# MVC4-实体框架、视图模型和验证,c#,jquery,asp.net-mvc,razor,C#,Jquery,Asp.net Mvc,Razor,我正在为一个项目使用MVC4和实体框架。我有一个创建产品视图,它是用产品视图模型强类型的: public class ProductViewModel { public Product Product { get; set; } public ProductType ProductType { get; set; } public List<SelectListItem> ProductTypes { get; set; } public List&
public class ProductViewModel
{
public Product Product { get; set; }
public ProductType ProductType { get; set; }
public List<SelectListItem> ProductTypes { get; set; }
public List<SelectListItem> ProductCompanies { get; set; }
[RegularExpression(@"^[a-zA-Z0-9àéèêçñ\s][a-zA-Z0-9àéèêçñ\s-]+$", ErrorMessage = "Invalid name !")]
public string Model { get; set; }
[RegularExpression(@"^[a-zA-Z0-9àéèêçñ\s][a-zA-Z0-9àéèêçñ\s-]+$", ErrorMessage = "Invalid name !")]
public string CompanyName { get; set; }
}
编辑:这是调试器的屏幕截图。当我检查这些值时,键[5]就是问题所在的键
您有没有想过将此字段设置为可选字段,然后通过在下拉列表中选择产品类型来创建新产品?我想,您有3个选项: 1) 重写正则表达式以支持空值 2) 向viewmodel中添加一些属性(例如bool)并编写自定义验证属性(例如IfPropertyAThenValidate)或类似的内容 3) 如果ViewModel包含现有产品类型,请忽略模型属性: e、 g:
我不认为这是您的问题,但我强烈建议重命名该属性,因为框架使用名称模型。将其命名为ProductModel或其他名称,以减少混淆。以单独的形式添加产品的创建(非嵌套)以避免父级验证,然后使用所选的创建产品重新填充父级dropdownlist。谢谢@MystereMan,我做到了(但我仍然有我的问题,哈哈)@MaximilianoBecerraBustamante感谢您的回答,但要求是集中产品和产品类型,所以我必须这样做…@Traffy,如果您尝试使用数据注释?您可以为每个属性在模型中设置“必填”字段,如果不显式地显示此属性(必需的)<代码> MODENSTATION.ISHORLATION/COD>不考虑验证此属性。数据注释->感谢您的回答。但是,我不知道为什么,问题出在我的ProductType对象上。在我的model.designer(我首先处理数据库)中,model属性设置为required。是的,在您的情况下,它将是ModelState modelofmodel=ModelState[“ProductType.model”];=>在保存实体之前,在服务器端创建新的产品类型
@model BuSIMaterial.Models.ProductViewModel
@{
ViewBag.Title = "Create a material";
}
@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
<fieldset>
<legend>Create a material</legend>
<div class="editor-label">
Product type : <a class="product_type" id="product_type_link">Using a new model</a>
</div>
<div id= "existing_product_type" class="editor-field">
@Html.DropDownListFor(p => p.Product.Id_ProductType, Model.ProductTypes)
@Html.ValidationMessageFor(model => model.Product.Id_ProductType)
</div>
<div id="new_product_type">
<div class="editor-label">
Model :
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.Model, new { maxlength = 50, id = "model" })
@Html.ValidationMessageFor(model => model.Model)
</div>
<div class="editor-label">
Company : <a class="company" id="company_link">Using a new company name</a>
</div>
<div id="existing_company" class="editor-field">
@Html.DropDownListFor(p => p.ProductType.Id_ProductCompany, Model.ProductCompanies)
@Html.ValidationMessageFor(model => model.ProductType.Id_ProductCompany)
</div>
<div id="new_company">
<div class="editor-label">
Name :
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.CompanyName, new { id = "company_name"})
@Html.ValidationMessageFor(model => model.CompanyName)
</div>
</div>
</div>
<div class="editor-label">
Price :
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.Product.CatalogPrice)
@Html.ValidationMessageFor(model => model.Product.CatalogPrice)
</div>
<div class="editor-label">
Purchase date :
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.Product.PurchaseDate, new { @class = "datepicker"})
@Html.ValidationMessageFor(model => model.Product.PurchaseDate)
</div>
<div class="editor-label">
Serial number :
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.Product.SerialNumber, new { maxlength = 50 })
@Html.ValidationMessageFor(model => model.Product.SerialNumber)
</div>
<div class="form-actions">
<button type="submit" class="btn btn-primary">Create</button>
</div>
</fieldset>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
@Scripts.Render("~/bundles/jqueryui")
@Styles.Render("~/Content/themes/base/css")
<script type="text/javascript">
$(document).ready(function () {
$("#product_type_link").click(function () {
if ($("#new_product_type").css("display") == "block") {
$("#new_product_type").css("display", "none");
$("#existing_product_type").css("display", "block");
$("#product_type_link").text("Using a new model");
$("#model").val("");
$("#company_name").val("");
}
else {
$("#new_product_type").css("display", "block");
$("#existing_product_type").css("display", "none");
$("#product_type_link").text("Using an existing model")
}
});
$("#company_link").click(function () {
if ($("#new_company").css("display") == "block") {
$("#new_company").css("display", "none");
$("#existing_company").css("display", "block");
$("#company_link").text("Using a new company name");
$("#company_name").val("");
}
else {
$("#new_company").css("display", "block");
$("#existing_company").css("display", "none");
$("#company_link").text("Using an existing company name")
}
});
});
</script>
}
[HttpPost]
public ActionResult Create(ProductViewModel pvm)
{
var productTypeList = from obj in db.ProductTypes orderby obj.ProductCompany.Name ascending where !((from element in db.VehicleTypes select element.Id_ProductType).Contains(obj.Id_ProductType)) select obj;
ViewBag.Id_ProductType = new SelectList(productTypeList, "Id_ProductType", "Information", pvm.Product.Id_ProductType);
pvm.ProductTypes = productTypeList.ToList().Select(p => new SelectListItem { Text = p.Information, Value = p.Id_ProductType.ToString() }).ToList();
ViewBag.Id_ProductCompany = new SelectList(db.ProductCompanies, "Id_ProductCompany", "Name", pvm.ProductType.Id_ProductCompany);
pvm.ProductCompanies = db.ProductCompanies.ToList().Select(pc => new SelectListItem { Text = pc.Name, Value = pc.Id_ProductCompany.ToString() }).ToList();
Product product = null;
ProductType productType = null;
if (ModelState.IsValid)
{
ModelStateDictionary errors = Validator.isValid(pvm.Product);
if (errors.Count > 0)
{
ModelState.Merge(errors);
return View(pvm);
}
if (!string.IsNullOrEmpty(pvm.Model))
{
if (!string.IsNullOrEmpty(pvm.CompanyName))
{
ProductCompany productCompany = new ProductCompany()
{
Name = pvm.CompanyName
};
productType = new ProductType()
{
Model = pvm.Model,
ProductCompany = productCompany
};
product = new Product()
{
PurchaseDate = pvm.Product.PurchaseDate,
SerialNumber = pvm.Product.SerialNumber,
CatalogPrice = pvm.Product.CatalogPrice,
ProductType = productType
};
}
else
{
productType = new ProductType()
{
Model = pvm.Model,
Id_ProductCompany = pvm.ProductType.Id_ProductCompany
};
product = new Product()
{
PurchaseDate = pvm.Product.PurchaseDate,
SerialNumber = pvm.Product.SerialNumber,
CatalogPrice = pvm.Product.CatalogPrice,
ProductType = productType
};
}
}
else
{
productType = new ProductType()
{
Id_ProductType = pvm.ProductType.Id_ProductType,
Id_ProductCompany = pvm.ProductType.Id_ProductCompany
};
product = new Product()
{
PurchaseDate = pvm.Product.PurchaseDate,
SerialNumber = pvm.Product.SerialNumber,
CatalogPrice = pvm.Product.CatalogPrice,
ProductType = productType
};
}
db.Products.AddObject(product);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(pvm);
}
ModelState modelStateOfModel = ModelState["Model"];
if (modelStateOfModel != null)
{
modelStateOfModel.Errors.Clear();
}
if (ModelState.IsValid)
{
...
}