标签：ErrorMessage string get c# 验证 item set 默认值 public
封装验证特性
public abstract class ValidationAttribute : Attribute
{
public ValidationAttribute()
{
ErrorMessage = "";
Name = "";
}
/// <summary>
/// 错误消息
/// </summary>
public string ErrorMessage { get; set; }
/// <summary>
/// 字段名称
/// </summary>
public string Name { get; set; }
/// <summary>
/// 验证过程
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public virtual bool Verify(object o)
{
return false;
}
/// <summary>
/// 默认值
/// </summary>
public object DefaultValue { get; set; }
}
错误信息实体
public class ValidResult
{
public ValidResult()
{
ValidResultDetails = new List<ValidResultDetail>();
}
public bool IsValid
{
get
{
return ValidResultDetails.Count() == 0;
}
}
public virtual string ErrorMessage
{
get
{
string r = null;
if (ValidResultDetails.Count() > 0)
{
r = ValidResultDetails.FirstOrDefault().ErrorMessage;
}
return r;
}
set
{
value = ErrorMessage;
}
} //错误摘要
public List<ValidResultDetail> ValidResultDetails { get; set; }
}
public class ValidResultDetail
{
public string Name { get; set; }
public bool IsValid
{
get; set;
}
public virtual string ErrorMessage { get; set; }
}
验证类
public class EntifyValidator
{
/// <summary>
/// 验证完所有字段
/// </summary>
public static ValidResult Validate(object data, params string[] ignore)
{
return new EntifyValidator().Verify(false, data, ignore);
}
/// <summary>
/// 当有未通过的验证时，直接返回，停止验证
/// </summary>
public static ValidResult ValidateQuickly(object data, params string[] ignore)
{
return new EntifyValidator().Verify(true, data, ignore);
}
/// <summary>
///
/// </summary>
/// <param name="quickly">验证完所有字段Or验证到未通过的立即返回</param>
/// <param name="data">需要验证的数据</param>
/// <param name="ignore">忽略的字段</param>
/// <returns></returns>
public virtual ValidResult Verify(bool quickly, object data, params string[] ignore)
{
ValidResult result = new ValidResult();
List<PropertyInfo> props = data.GetType().GetProperties().Where(a => !ignore.Contains(a.Name.ToLower())).ToList();
foreach (var item in props)
{
var validateattrs = item.GetCustomAttributes(typeof(ValidationAttribute), true);
var input = item.GetValue(data, null);
foreach (var itemattr in validateattrs)
{
var attr = ((ValidationAttribute)itemattr);
if (attr != null)
{
attr.Name = item.Name;
SetDefaultValue(data, item, attr);
var isvalid = attr.Verify(input);
if (string.IsNullOrEmpty(attr.ErrorMessage)) continue;
if (!isvalid)
{
ValidResultDetail validResultDetail = new ValidResultDetail();
validResultDetail.Name = item.Name;
validResultDetail.ErrorMessage = string.Format(attr.ErrorMessage, item.Name);
validResultDetail.IsValid = false;
result.ValidResultDetails.Add(validResultDetail);
if (quickly)
{
return result;
}
}
}
}
}
return result;
}
/// <summary>
/// 设置默认值
/// </summary>
private void SetDefaultValue(object data, PropertyInfo item, ValidationAttribute attr)
{
var input = item.GetValue(data, null);
if (attr.DefaultValue != null && input == null)//设置默认值
{
item.SetValue(data, attr.DefaultValue, null);
}
else if (attr.DefaultValue != null && input.GetType().Name == "DateTime")
{
if (Convert.ToDateTime(input) == DateTime.MinValue)
{
item.SetValue(data, Convert.ToDateTime(attr.DefaultValue), null);
}
}
}
}
封装的简单验证特性
public class InEnumAttribute : ValidationAttribute
{
public InEnumAttribute()
{
ErrorMessage = "{0}应该在区间内";
}
public Type RangeType { get; set; }
public override bool Verify(object o)
{
if (o == null)
{
return false;
}
var r = false;
foreach (var item in Enum.GetValues(RangeType))
{
if (((int)item) == Convert.ToInt32(o))
{
r = true;
break;
}
}
return r;
}
}
public class NotNullAttribute : ValidationAttribute
{
public bool? NotNull { get; set; } = true;
public NotNullAttribute()
{
ErrorMessage = "{0}必填";
}
public override bool Verify(object o)
{
if (o == null)
{
return false;
}
else if (string.IsNullOrWhiteSpace(o.ToString()))
{
return false;
}
return true;
}
}
/// <summary>
/// 默认值
/// </summary>
public class DValueAttribute : ValidationAttribute
{
public DValueAttribute()
{
}
}
使用方式在要验证的实体类型加特性
/// <summary>
/// 转单
/// </summary>
[NotNull(ErrorMessage = "转单必填")]
public string cserviceno { get; set; }
/// <summary>
/// 修改时间
/// </summary>
[DValue(DefaultValue = "1900-01-01 00:00:00")]
public DateTime dlastmod { get; set; }
/// <summary>
/// 包裹类型
/// </summary>
[InEnum(ErrorMessage = "包裹类型错误", RangeType = typeof(Nitemtype))]
public Nitemtype nitemtype { get; set; }
调用
var r = EntifyValidator.Validate(rec);
if (!r.IsValid)
{
r.ValidResultDetails.Select(item => item.ErrorMessage);
}
标签：ErrorMessage,string,get,c#,验证,item,set,默认值,public 来源： https://www.cnblogs.com/shuaimeng/p/14101504.html
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