internal static IQueryable CreateOrderByExpression(IOrderedDictionary parameters, IQueryable source, IDynamicQueryable queryable)
{
if (parameters != null && parameters.Count > 0)
{
//extract parameter values
//extract the order by expression and apply it to the queryable
string orderByExpression = GetOrderByClause(parameters.ToDictionary());
if (!String.IsNullOrEmpty(orderByExpression))
{
return(queryable.OrderBy(source, orderByExpression));
}
}
return(source);
}
internal static IQueryable CreateOrderByExpression(IOrderedDictionary parameters, IQueryable source, IDynamicQueryable queryable) {
if (parameters != null && parameters.Count > 0) {
//extract parameter values
//extract the order by expression and apply it to the queryable
string orderByExpression = GetOrderByClause(parameters.ToDictionary());
if (!String.IsNullOrEmpty(orderByExpression)) {
return queryable.OrderBy(source, orderByExpression);
}
}
return source;
}
protected IQueryable ExecuteQueryExpressions(IQueryable source, QueryContext context)
{
if (source != null)
{
QueryCreatedEventArgs queryArgs = new QueryCreatedEventArgs(source);
OnQueryCreated(queryArgs);
source = queryArgs.Query ?? source;
// Support the Dynamic Expression language used by LinqDataSource
if (AutoGenerateWhereClause)
{
if (!String.IsNullOrEmpty(Where))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture,
AtlasWeb.LinqDataSourceView_WhereAlreadySpecified, _owner.ID));
}
source = QueryableDataSourceHelper.CreateWhereExpression(context.WhereParameters, source, _queryable);
}
else if (!String.IsNullOrEmpty(Where))
{
source = _queryable.Where(source, Where, context.WhereParameters.ToEscapedParameterKeys(_owner));
}
if (AutoGenerateOrderByClause)
{
if (!String.IsNullOrEmpty(OrderBy))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture,
AtlasWeb.LinqDataSourceView_OrderByAlreadySpecified, _owner.ID));
}
source = QueryableDataSourceHelper.CreateOrderByExpression(context.OrderByParameters, source, _queryable);
}
else if (!String.IsNullOrEmpty(OrderBy))
{
source = _queryable.OrderBy(source, OrderBy, context.OrderByParameters.ToEscapedParameterKeys(_owner));
}
string groupBy = GroupBy;
if (String.IsNullOrEmpty(groupBy))
{
if (!String.IsNullOrEmpty(OrderGroupsBy))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture,
AtlasWeb.LinqDataSourceView_OrderGroupsByRequiresGroupBy, _owner.ID));
}
}
else
{
source = _queryable.GroupBy(source, groupBy, "it", context.GroupByParameters.ToEscapedParameterKeys(_owner));
if (!String.IsNullOrEmpty(OrderGroupsBy))
{
source = _queryable.OrderBy(source, OrderGroupsBy, context.OrderGroupsByParameters.ToEscapedParameterKeys(_owner));
}
}
if (!String.IsNullOrEmpty(SelectNew))
{
source = _queryable.Select(source, SelectNew, context.SelectParameters.ToEscapedParameterKeys(_owner));
}
return(source);
}
return(source);
}