用于视图模型的 Asp.NET MVC 自定义验证器？
我使用自定义视图模型类作为 DTO 对象来保存要在视图页面上显示的数据。我已通过 DataAnnotations 库应用验证来对这些类的属性执行服务器端验证。这是一个简单的示例：
[DisplayName("Customer Account Id")]
[Required(ErrorMessage = "* Account Number is required")]
[StringLength(16, ErrorMessage = "* Account Number must be 16 characters in length", MinimumLength = 16)]
public string CustomerAccountId { get; set; }
如果有人提交搜索，并且该字段未通过或通过的长度不是 16，则验证失败，并且通过 ValidationMessage HtmlHelper 在页面上显示一条错误消息：
<%= Html.ValidationMessage("CustomerAccountId")%>
现在我需要添加按帐户 ID 或名字/姓氏组合进行搜索的功能。我的问题是：
如何应用条件验证？如果我提交带有名字/姓氏的搜索，我不希望验证失败，因为帐号也没有通过。我找到了此链接，其中显示了如何实现自定义验证器，但这似乎适用于 1 个属性。如何传递整个对象模型，并将适当的验证错误消息传回要在页面上显示的适当字段？这可能吗？
I am using custom view model classes as DTO objects to hold data for display on my View pages. I have applied validation via the DataAnnotations library to perform server side validation on the properties of these classes. Here is a simple example:
[DisplayName("Customer Account Id")]
[Required(ErrorMessage = "* Account Number is required")]
[StringLength(16, ErrorMessage = "* Account Number must be 16 characters in length", MinimumLength = 16)]
public string CustomerAccountId { get; set; }
If someone submits a search and this field does not come through or comes through at a length that is not 16, validation fails, and an error message is displayed on the page via the ValidationMessage HtmlHelper:
<%= Html.ValidationMessage("CustomerAccountId")%>
Now I need to add the ability to search by account id OR a combination of First/Last name. My question is this:
How do I apply conditional validation? If I submit a search with First/Last name, I don't want validation to fail because an account number was not passed through as well. I found this link, which shows how to implement a custom validator, but it seems like this applies to 1 property. How do I pass an entire object model through, and pass back the appropriate validation error messages to the appropriate fields to be displayed on the page? Is this possible?
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您可以实现 IDataErrorInfo。 （文章标题中类名拼写错误，但代码是正确的。）
You can implement IDataErrorInfo. (The class name is misspelled in the article title, but the code is right.)