How to convert IEnumerable to Subsonic collection? - linq

Question

Embarrassing question really -- I have Subsonic collection, then I filter out some data using Where.
MyColl.Where(it => it.foo()==true)
now I would like to pass those data still as Subsonic collection. How to do it (the most properly way)? I checked constructor for Subsonic collection, ToX() methods, and googled.
edit: Subsonic 2.x series.
Thank you in advance, and sorry for naive question.

Answer 1

In SubSonic 2.x, the data isn't actually filtered out with Where() until the query is re-executed against the database. I'm assuming that's the same in 3.0. In 2.x there was a .Filter() method that would do what you are looking for.
The .Filter() method gets added to the generated classes. Here's what mine looks like (it's customized from the default):
/// <summary>
/// Filters an existing collection based on the set criteria. This is an in-memory filter.
/// All existing wheres are retained.
/// </summary>
/// <returns>TblSomethingOrOtherCollection</returns>
public TblSomethingOrOtherCollection Filter(SubSonic.Where w)
{
return Filter(w, false);
}
/// <summary>
/// Filters an existing collection based on the set criteria. This is an in-memory filter.
/// Existing wheres can be cleared if not needed.
/// </summary>
/// <returns>TblSomethingOrOtherCollection</returns>
public TblSomethingOrOtherCollection Filter(SubSonic.Where w, bool clearWheres)
{
if (clearWheres)
{
this.wheres.Clear();
}
this.wheres.Add(w);
return Filter();
}
/// <summary>
/// Filters an existing collection based on the set criteria. This is an in-memory filter.
/// Thanks to developingchris for this!
/// </summary>
/// <returns>TblSomethingOrOtherCollection</returns>
public TblSomethingOrOtherCollection Filter()
{
for (int i = this.Count - 1; i > -1; i--)
{
TblSomethingOrOther o = this[i];
foreach (SubSonic.Where w in this.wheres)
{
bool remove = false;
System.Reflection.PropertyInfo pi = o.GetType().GetProperty(w.ColumnName);
if (pi != null && pi.CanRead)
{
object val = pi.GetValue(o, null);
if (w.ParameterValue is Array)
{
Array paramValues = (Array)w.ParameterValue;
foreach (object arrayVal in paramValues)
{
remove = !Utility.IsMatch(w.Comparison, val, arrayVal);
if (remove)
break;
}
}
else
{
remove = !Utility.IsMatch(w.Comparison, val, w.ParameterValue);
}
}
if (remove)
{
this.Remove(o);
break;
}
}
}
return this;
}
}

Answer 2

For some reason i could never get the inline method of filter to work, but its easy to use like this:
SubSonic.Where w = new Where();
w.ColumnName = Product.CatIDColumn.PropertyName;
w.Comparison = Comparison.Equals;
w.ParameterValue = "1";
ProductCollection objFilteredCol = objProdCollection.Where(w).Filter();