/// <summary>
/// 动态查询
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="query"></param>
/// <returns></returns>
public static IQueryable <T> DynamicQuery <T>(this IQueryable <T> queryable, QueryCondition query)
{
if (queryable == null)
{
throw new ArgumentNullException(nameof(queryable));
}
if (query == null)
{
return(queryable);
}
return(ExpressionExpand <T> .DynamicQuery(queryable, query));
}
/// <summary>
/// 动态排序
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="sortings"></param>
/// <returns></returns>
public static IQueryable <T> DynamicSort <T>(this IQueryable <T> queryable, IEnumerable <SortingParameter> sortings)
{
if (queryable == null)
{
throw new ArgumentNullException(nameof(queryable));
}
if (sortings == null || !sortings.Any())
{
return(queryable);
}
return(ExpressionExpand <T> .DynamicSort(queryable, sortings));
}
/// <summary>
/// 条件：与
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="this"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static Expression <Func <T, bool> > And <T>(this Expression <Func <T, bool> > @this, Expression <Func <T, bool> > expression)
{
return(ExpressionExpand <T> .And(@this, expression));
}
/// <summary>
/// 获取条件表达式
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static Expression <Func <T, bool> > GetExpression <T>()
{
return(ExpressionExpand <T> .GetExpression());
}