Question

我有一个表单，我只想验证某些字段。我曾经使用data-val =＆＃34; false＆＃34;来禁用一些字段验证。它在客户端工作正常。但是服务器并没有。

这是我的代码

<div class="col-lg-12">
     <div class="col-lg-6">
         <label>@Html.RadioButtonFor(Function(model) model.Sex, "M") Male
         </label>
      </div>
      <div class="col-lg-6">
          <label>@Html.RadioButtonFor(Function(model) model.Sex, "F") Female
          </label>
      </div>
      @Html.ValidationMessageFor(Function(model) model.Sex, "", New With {.class = "text-danger"})
  </div>
<div class="col-lg-12 ">
    @Html.LabelFor(Function(model) model.DateOfJoin, htmlAttributes:=New With {.class = "col-lg-4 control-label"})
    <div class="col-lg-8">
       @Html.EditorFor(Function(model) model.DateOfJoin, New With {.htmlAttributes = New With {.class = "form-control datefield", .data_val = False}})
       @*@Html.ValidationMessageFor(Function(model) model.DateOfJoin, "", New With {.class = "text-danger"})*@
     </div>
  </div>

我的模特是

<MetadataType(GetType(EmployeeMasterMetaData))> _
Partial Public Class EmployeeMaster
  Public Overridable Property DepartmentMaster As DepartmentMaster
  Public Overridable Property DesignationMaster As DesignationMaster
End Class
Public Class EmployeeMasterMetaData

 <Required(ErrorMessage:="Sex is required")>
 Public Property Sex As String

 <Display(Name:="Date Of Join")>
 Public Property DateOfJoin As Date
End Class

我不想验证DateOfJoin字段并为其清空值，可以保存。怎么办呢？

Answer 1

如果您希望日期字段可以为空，请设置您的日期，如下所示。

public DateTime? DateOfJoin { get; set; }

日期时间类型后面的问号标记将数据设置为可空。如果使用Database first方法，则允许相应的字段接受空值。

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