/// <summary>
/// 必填项验证
/// </summary>
/// <param name="field"></param>
/// <param name="fieldName"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool Required(object field, string fieldName, ref ValidateResult result)
{
if (field == null ||
(field is string && string.IsNullOrWhiteSpace((string)field)))
{
result.AddError(string.Format("{0} 不能为空", fieldName));
return(false);
}
return(true);
}
/// <summary>
/// 唯一性验证
/// </summary>
/// <param name="model"></param>
/// <param name="fieldName"></param>
/// <param name="CheckNameUnique">委托， 传入一个验证model是否唯一的方法</param>
/// <param name="result"></param>
/// <returns></returns>
public static bool UniqueField(object model, string fieldName, Predicate <object> CheckNameUnique, ref ValidateResult result)
{
if (CheckNameUnique == null)
{
throw new ArgumentException("CheckNameUnique委托不能为空！");
}
if (!CheckNameUnique(model))
{
result.AddError(string.Format("{0} 值已存在，不能重复 ", fieldName));
return(false);
}
return(true);
}
/// <summary>
/// 值范围控制验证
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="field"></param>
/// <param name="fieldName"></param>
/// <param name="min"></param>
/// <param name="max"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool RangeControl <T>(T field, string fieldName, T min, T max, ref ValidateResult result)
where T : IComparable
{
if (min.CompareTo(max) != -1)
{
throw new ArgumentException(string.Format("min {0} > max {1}", min, max));
}
if (field.CompareTo(max) > 0 || field.CompareTo(min) < 0) // field > max or < min
{
result.AddError(string.Format("{0} 值不在范围内({1} ~ {2})", fieldName, min, max));
return(false);
}
return(true);
}
/// <summary>
/// string 长度控制
/// </summary>
/// <param name="field"></param>
/// <param name="fieldName"></param>
/// <param name="minLength"></param>
/// <param name="maxLength"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool LengthControl(string field, string fieldName, int minLength, int maxLength, ref ValidateResult result)
{
if (!Required(field, fieldName, ref result))
{
return(false);
}
if (minLength >= maxLength)
{
throw new ArgumentException(string.Format("minLength {0} > maxLength {1}", minLength, maxLength));
}
int length = field.Length;
if (length > maxLength || length < minLength)
{
result.AddError(string.Format("{0} 长度不在范围内({1} ~ {2})", fieldName, minLength, maxLength));
return(false);
}
return(true);
}