CustomValidation属性不使用ASP.NET MVC 3和EF
题
我了解如何创建自定义验证属性。实际上,当我使用种子方法预先填充数据库时,正在执行验证方法,如果失败,则会引发异常。但是,该验证不适用于实体的创建形式。
我是否必须将某些东西更改为HTML(剃须刀形式)?
它只是让我添加验证验证失败的项目。
代码在这里:
namespace Data.Model
{
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
sealed public class YearsValidationAttribute : ValidationAttribute
{
// Internal field to hold the min value.
readonly int _years;
public int Years
{
get { return _years; }
}
public YearsValidationAttribute(int years)
{
_years = years;
}
public override bool IsValid(object value)
{
var years = (int)value;
bool result = true;
if (this.Years != null)
{
result = Years >= years;
}
return result;
}
public override string FormatErrorMessage(string name)
{
return String.Format(CultureInfo.CurrentCulture,
ErrorMessageString, name, Years);
}
}
}
public class Position
{
[DatabaseGenerated(System.ComponentModel.DataAnnotations.DatabaseGeneratedOption.Identity)]
public int PositionID { get; set; }
[Required(ErrorMessage = "Position name is required.")]
[StringLength(20, MinimumLength = 3, ErrorMessage = "Name should not be longer than 20 characters.")]
[Display(Name = "Position name")]
public string name { get; set; }
[Required(ErrorMessage = "Number of years is required")]
[Display(Name = "Number of years")]
[YearsValidationAttribute(5, ErrorMessage = "{0} value must be greater than {1} years.")]
public int yearsExperienceRequired { get; set; }
public virtual ICollection<ApplicantPosition> applicantPosition { get; set; }
}
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>Position</legend>
@Html.HiddenFor(model => model.PositionID)
<div class="editor-label">
@Html.LabelFor(model => model.name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.name)
@Html.ValidationMessageFor(model => model.name)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.yearsExperienceRequired)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.yearsExperienceRequired)
@Html.ValidationMessageFor(model => model.yearsExperienceRequired)
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
}
解决方案
您所拥有的代码不会为您提供客户端验证器,只有服务器端。但这是一个很好的起点。您在服务器上需要执行的操作方法是检查模型是否有效:
public ActionResult YourAction(YourModel model)
{
if(ModelState.IsValid)
{
// Do your save
}
else
{
// Do your other stuff
}
}
如果您也需要客户端验证,则可以在此处使用资源: http://bradwilson.typepad.com/blog/2010/10/mvc3-unobtrusive-validation.html
您也可以尝试使用 Remote
验证属性: http://msdn.microsoft.com/en-us/library/gg508808(V=VS.98).aspx
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