Castle ActiveRecord学习实践(9)：数据有效性的验证
在做数据层处理时，我们会为输入的数据做有效性验证，ActiveRecord 为我们提供了如下的验证：
ValidateCreditCard
ValidateDate
ValidateDateTime
ValidateDecimal
ValidateDouble
ValidateEmail
ValidateLength
ValidateNonEmpty
ValidateReg
使用验证
1: [ActiveRecord("Comments")]
2: public class Comment : ActiveRecordValidationBase<Comment>
3: {
4: [PrimaryKey("CommentId")]
5: public int Id { get; set; }
6:
7: [Property]
8: [ValidateNonEmpty]
9:
10: public string Text { get; set; }
11:
12: [Property]
13: [ValidateNonEmpty]
14: public string Author { get; set; }
15:
16: [Property]
17: public DateTime DateAdded { get; set; }
18:
19: [BelongsTo("PostId")]
20: public Post Post { get; set; }
21:
22: }
注意：Comment类需要继承于ActiveRecordValidationBase，引用Castle.Components.Validator命名空间
ActiveRecordValidationBase类为我们提供了如下一个方法和属性：
IsValid() 验证是否通过
ValidationErrorMessages 获取验证错误信息数组
调用验证
1: Comment comment=new Comment ();
2: comment.Author=e.CommentAuthor;
3: comment.Text=e.CommentText;
4: comment.DateAdded = DateTime.Now;
5: comment.Post = _service.FindPostBy(_postId);
6: if (comment.IsValid())
7: {
8: _service.AddComment(comment);
9: }
10: else
11: {
12: Exception ex = new Exception(comment.ValidationErrorMessages[0]);
13: throw ex;
14: }
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