Question

我有一个包含多个控件的表单。我添加了数据注释，以便在必填字段为空时向用户显示错误消息。 TextBoxes和其他控件显示消息，标签名称前面是“*”，但下拉列表不显示。一旦用户清除了所有错误消息并再次单击“提交”，则会显示下拉框的消息。如何强制下拉框与文本框同时显示消息？

其他信息：以下是我的数据注释示例：

    [MetadataType(typeof(UserMetaData))]
    public partial class UserMeta
    {
    }
 public class UserMetaData
        {
            [Required(ErrorMessage = "*")] 
            public int GenderID { get; set; } 

    //The gender ID is displayed in a dropdown 
    list with "Select" as the default option. Then, it has all the other genders
     showing in the dropdown once it is clicked on.

                [Required(ErrorMessage = "*")]
                public DateTime DataOfBirth{ get; set; } 
               }

In my view, I am using 
@Html.ValidationMessageFor(model => model.DataOfBirth) //This is working fine.

@Html.ValidationMessageFor(model => model.GenderID) 
//Here is the dropdown
    @Html.DropDownList("GenderID", null, "Select", new { style = "width:200px;", onchange = "ValidateDropdown()" })
//This is the one that is not working as expected. I could get it to work using javascript, but I am trying not to it if I there is a way to get it to work properly using data annotation. 

Thank in advance for your help.

Answer 1

我无法让它在服务器端正常工作。因此，我必须编写一个JQuery函数来对客户端的下拉列表进行验证。然后，只有在下拉列表中有选择时才会发布帖子。

当文本框和其他控件触发时，DropdownList数据注释不会触发

1 个答案: