/// <summary>
/// Adds number of items to take.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="take">Number of items to take.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> Take <TEntity>(this IODataQueryable <TEntity> query, int take)
{
var result = query.Clone();
result.Take = take;
return(result);
}
/// <summary>
/// Adds number items to skip.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="skip">Number of items to skip.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> Skip <TEntity>(this IODataQueryable <TEntity> query, int skip)
{
var result = query.Clone();
result.Skip = skip;
return(result);
}
/// <summary>
/// Adds property as descending order.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="expression">Property expression.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> OrderByDescending <TEntity>(
this IODataQueryable <TEntity> query,
Expression <Func <TEntity, object> > expression)
{
var result = query.Clone();
result.Order.Add(GetPropertyName(expression) + " desc");
return(result);
}
/// <summary>
/// Set selected properties.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="select">Column names.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> Select <TEntity>(
this IODataQueryable <TEntity> query,
IEnumerable <string> select)
{
var result = query.Clone();
result.Select.AddRange(select);
return(result);
}
/// <summary>
/// Adds order columns by name.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="order">Column names.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> OrderBy <TEntity>(
this IODataQueryable <TEntity> query,
IEnumerable <string> order)
{
var result = query.Clone();
result.Order.AddRange(order);
return(result);
}
/// <summary>
/// Filter condition.
/// </summary>
/// <typeparam name="TEntity">Type of items.</typeparam>
/// <param name="query">Query to add to.</param>
/// <param name="expression">Conditional expression.</param>
/// <returns>New query.</returns>
public static IODataQueryable <TEntity> Where <TEntity>(
this IODataQueryable <TEntity> query,
Expression <Func <TEntity, bool> > expression)
{
var result = query.Clone();
result.Filter = query.Filter == null
? $"({query.Context.FilterMaker.MakeFilter(expression)})"
: $"{query.Filter} and ({query.Context.FilterMaker.MakeFilter(expression)})";
return(result);
}
