如何使用“required”htmlattribute向mvc 5 razor视图文本输入编辑器添加自定义错误消息

我对Asp.Net MVC很天真。

我有一个局部视图（ASP.Net MVC），其中我有一些必填字段我想显示自定义错误消息，如果没有提供任何必填字段。 以下是我的局部视图的完整cshtml代码。

@model CMSAdminPanel.ViewModel.ProductView 
Material And Labour Cost For Each Size
 
 @Html.ValidationSummary(false, "", new { @class = "text-danger" }) @for (int i = 0; i  x.ServiceView.ListPriceView[i].ProductSizeType) 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].ProductSizeTypeName, "Size - " + Model.ServiceView.ListPriceView[i].ProductSizeTypeName, htmlAttributes: new { @class = "control-label col-md-4" }) 
 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].LabourCost, htmlAttributes: new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(x => x.ServiceView.ListPriceView[i].LabourCost, new { htmlAttributes = new { @class = "form-control", required = "required"} }) @Html.ValidationMessageFor(x => x.ServiceView.ListPriceView[i].LabourCost,"", new { @class = "text-danger" }) 
 
 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].MaterialCost, htmlAttributes: new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(x => x.ServiceView.ListPriceView[i].MaterialCost, new { htmlAttributes = new { @class = "form-control", required = "required" } }) @Html.ValidationMessageFor(x => x.ServiceView.ListPriceView[i].MaterialCost, "", new { @class = "text-danger" }) 
 
 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].Profit, htmlAttributes: new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(x => x.ServiceView.ListPriceView[i].Profit, new { htmlAttributes = new { @class = "form-control", required = "required" } }) @Html.ValidationMessageFor(x => x.ServiceView.ListPriceView[i].Profit, "", new { @class = "text-danger"}) 
 
 } 

我想显示自定义消息“物料成本是必需的”，而我得到“此字段是必需的”。 所以我想在客户端覆盖此difault错误消息。

我希望实现这样的目标：

 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].LabourCost, htmlAttributes: new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(x => x.ServiceView.ListPriceView[i].LabourCost, new { htmlAttributes = new { @class = "form-control", required = "required", **data_val_required = "LabourCost is requried"**} }) @Html.ValidationMessageFor(x => x.ServiceView.ListPriceView[i].LabourCost,"", new { @class = "text-danger" }) 
  

任何建议/解决方案都会有很大的帮助

Answer 1

在模型类中，添加将[Required]属性更改为

 [Required(ErrorMessage = "Material cost is required")] public decimal MaterialCost {get;set;} 

另一种方法是使用JQuery从JavaScript设置它或覆盖设置它的属性。 默认情况下， ValidationMessageFor的输出是

 data-val-required="The field is required.". 

因此，您可以在标记中覆盖此值

Answer 2

我找到了一种方法来使用htmlAttribute title属性覆盖客户端上的默认必需消息，下面是代码：

 
 @Html.LabelFor(x => x.ServiceView.ListPriceView[i].LabourCost, htmlAttributes: new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(x => x.ServiceView.ListPriceView[i].LabourCost, new { htmlAttributes = new { @class = "form-control", required = "required", title = "LabourCost is requried"} }) @Html.ValidationMessageFor(x => x.ServiceView.ListPriceView[i].LabourCost,"", new { @class = "text-danger" }) 
  

Answer 3

在你的模型中

 [Required(ErrorMessage = "Material cost is required")] public doubleMaterialCost { get; set; } 

如果您的站点中有多种文化，则可以选择从资源加载它并传递资源字符串。

或者在你的行动中

 public ActionResult(YourModel model) { if (model.doubleMaterialCost == 0) ModelState.AddModelError("doubleMaterialCost ", "Material cost is required");