Question
I am creating a control that receive in datasource a DataSet or List
How i convert a IEnumerable to List in a CreateChildControls event?
protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
{
if (dataSource is System.Data.DataSet)
{
}
else if(dataSource is IList)
{
}
}
Accepted Answer
Usually one would use the IEnumerable<T>.ToList() extensionmethod from Linq but in your case you can not use it (right away) because you have the non-generic IEnumerable interface. Sou you will have to cast it first (also using Linq):
datasource.Cast<object>().ToList();
No matter what you original collection actually ist, this will always succeed.
Popular Answer
I re-read your question and it seems that you are receiving a dataset which is ALREADY a list OR a DataSet, but it is cast to an IEnumerable. In this case, simply do
IList myList = (IList)datasource //will throw exception if invalid
or
IList myList = datasource as IList //mylist will be null if conversion cannot be made
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