/// <summary>
/// 验证必须为空
/// </summary>
/// <typeparam name="TInnerValue"></typeparam>
/// <param name="field"></param>
/// <param name="customMsg">用户自定义错误信息</param>
/// <returns></returns>
public static CollectionField <TInnerValue> BeEmpty <TInnerValue>(this CollectionField <TInnerValue> field, string customMsg)
{
if (field.ShouldValidate)
{
if (field.Value.Count > 0)
{
throw new ValidationException(customMsg);
}
}
return(field);
}
/// <summary>
/// 验证不包含
/// </summary>
/// <typeparam name="TInnerValue"></typeparam>
/// <param name="field"></param>
/// <param name="predicate"></param>
/// <returns></returns>
public static CollectionField <TInnerValue> NotBeExist <TInnerValue>(this CollectionField <TInnerValue> field, Func <TInnerValue, bool> predicate)
{
if (field.ShouldValidate)
{
if (field.Value.Any(predicate))
{
throw new ValidationException(field.DisplayName + ":不允许重复！");
}
}
return(field);
}
/// <summary>
/// 验证不允许为空
/// </summary>
/// <typeparam name="TInnerValue"></typeparam>
/// <param name="field"></param>
/// <param name="customMsg">用户自定义错误信息</param>
/// <returns></returns>
public static CollectionField <TInnerValue> NotBeNullOrEmpty <TInnerValue>(this CollectionField <TInnerValue> field, string customMsg = "")
{
if (field.ShouldValidate)
{
if (field.Value == null || field.Value.Count <= 0)
{
throw new ValidationException(string.IsNullOrEmpty(customMsg) ?
string.Format("{0}: 不允许为空！", field.DisplayName) : customMsg);
}
}
return(field);
}
/// <summary>
/// 验证不包含重复的项
/// </summary>
/// <typeparam name="TInnerValue"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="field"></param>
/// <param name="GetPropertyValue">要验证唯一性的属性值</param>
/// <param name="uniquePropertyDisplayName">要验证唯一性的属性的显示名称</param>
/// <returns></returns>
public static CollectionField <TInnerValue> ContainUniqueItem <TInnerValue, TProperty>(this CollectionField <TInnerValue> field,
Func <TInnerValue, TProperty> GetPropertyValue, string uniquePropertyDisplayName)
{
if (field.ShouldValidate)
{
ISet <TProperty> values = new HashSet <TProperty>();
foreach (TInnerValue item in field.Value)
{
TProperty value = GetPropertyValue(item);
if (values.Contains(value))
{
throw new ValidationException(string.Format("{0}：不允许包含重复的{1}！", field.DisplayName,
uniquePropertyDisplayName));
}
else
{
values.Add(value);
}
}
}
return(field);
}
/// <summary>
/// 验证集合中必须包含 itemValue
/// </summary>
/// <typeparam name="TInnerValue"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="field"></param>
/// <param name="GetPropertyValue"></param>
/// <param name="itemValue"></param>
/// <param name="customMsg"></param>
/// <returns></returns>
public static CollectionField <TInnerValue> ContainItem <TInnerValue, TProperty>(this CollectionField <TInnerValue> field,
Func <TInnerValue, TProperty> GetPropertyValue, TProperty itemValue, string customMsg = "")
{
if (field.ShouldValidate)
{
foreach (TInnerValue item in field.Value)
{
TProperty value = GetPropertyValue(item);
if (value.Equals(itemValue))
{
return(field);
}
}
}
throw new ValidationException(string.IsNullOrEmpty(customMsg) ?
string.Format("{0}：必须包含{1}！", field.DisplayName, itemValue.ToString()) : customMsg);
}