/// <summary>
/// Where条件过滤--扩展
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="source">数据源</param>
/// <param name="criteria">查询条件</param>
/// <returns></returns>
public static IQueryable <T> Filter <T>(this IQueryable <T> source, ICriteria <T> criteria) where T : class, IAggregateRoot
{
if (criteria == null)
{
return(source);
}
var predicate = criteria.GetPredicate();
if (predicate == null)
{
return(source);
}
return(source.Where(predicate));
}
/// <summary>
/// 添加查询条件
/// </summary>
/// <typeparam name="TEntity">实体类型</typeparam>
/// <param name="source">数据源</param>
/// <param name="criteria">查询条件对象</param>
public static IQueryable <TEntity> Where <TEntity>(this IQueryable <TEntity> source, ICriteria <TEntity> criteria) where TEntity : class
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (criteria == null)
{
throw new ArgumentNullException(nameof(criteria));
}
var predicate = criteria.GetPredicate();
if (predicate == null)
{
return(source);
}
return(source.Where(predicate));
}
/// <summary>
/// 添加查询条件
/// </summary>
/// <param name="criteria">查询条件</param>
/// <returns></returns>
public IQuery <TEntity, TKey> Filter(ICriteria <TEntity> criteria)
{
And(criteria.GetPredicate());
return(this);
}
