Convert List of object to List of string

Question

Is there a way to convert a List of Object  to a List of String  in c  or vb net without iterating through all the items   Behind the scenes iteration is fine     I just want concise code   Update  The best way is probably just to do a new select  myList Select function i  i ToString    ToList      or  myList Select i   gt  i ToString    ToList

User · Answer

This works for all types   List lt object gt  objects   new List lt object gt     List lt string gt  strings   objects Select s   gt   string s  ToList

User · Answer

Can you do the string conversion while the List of object  is being built  This would be the only way to avoid enumerating the whole list after the List of object  was created

User · Answer

You mean something like this   List lt object gt  objects   new List lt object gt     var strings    from o in objects               select o ToString    ToList

User · Answer

Can you do the string conversion while the List of object  is being built  This would be the only way to avoid enumerating the whole list after the List of object  was created

User · Answer

Not possible without iterating to build a new list  You can wrap the list in a container that implements IList   You can use LINQ to get a lazy evaluated version of IEnumerable lt string gt  from an object list like this   var stringList   myList OfType lt string gt

User · Answer

No - if you want to convert ALL elements of a list  you ll have to touch ALL elements of that list one way or another    You can specify   write the iteration in different ways  foreach          or  ConvertAll   or whatever   but in the end  one way or another  some code is going to iterate over each and every element and convert it   Marc

User · Answer

Not possible without iterating to build a new list  You can wrap the list in a container that implements IList   You can use LINQ to get a lazy evaluated version of IEnumerable lt string gt  from an object list like this   var stringList   myList OfType lt string gt

User · Answer

Can you do the string conversion while the List of object  is being built  This would be the only way to avoid enumerating the whole list after the List of object  was created

User · Answer

Can you do the string conversion while the List of object  is being built  This would be the only way to avoid enumerating the whole list after the List of object  was created

User · Answer

You mean something like this   List lt object gt  objects   new List lt object gt     var strings    from o in objects               select o ToString    ToList

User · Answer

You mean something like this   List lt object gt  objects   new List lt object gt     var strings    from o in objects               select o ToString    ToList

User · Answer

No - if you want to convert ALL elements of a list  you ll have to touch ALL elements of that list one way or another    You can specify   write the iteration in different ways  foreach          or  ConvertAll   or whatever   but in the end  one way or another  some code is going to iterate over each and every element and convert it   Marc

User · Answer

No - if you want to convert ALL elements of a list  you ll have to touch ALL elements of that list one way or another    You can specify   write the iteration in different ways  foreach          or  ConvertAll   or whatever   but in the end  one way or another  some code is going to iterate over each and every element and convert it   Marc

User · Answer

List lt string gt  myList Str   myList Select x  gt x Value  OfType lt string gt    ToList     Use  quot Select quot  to select a particular column

User · Answer

List lt string gt  myList Str   myList Select x  gt x Value  OfType lt string gt    ToList     Use  quot Select quot  to select a particular column

User · Answer

You mean something like this   List lt object gt  objects   new List lt object gt     var strings    from o in objects               select o ToString    ToList

User · Answer

If you want more control over how the conversion takes place  you can use ConvertAll   var stringList   myList ConvertAll obj   gt  obj SomeToStringMethod

User · Answer

This works for all types   List lt object gt  objects   new List lt object gt     List lt string gt  strings   objects Select s   gt   string s  ToList

User · Answer

Not possible without iterating to build a new list  You can wrap the list in a container that implements IList   You can use LINQ to get a lazy evaluated version of IEnumerable lt string gt  from an object list like this   var stringList   myList OfType lt string gt

User · Answer

Not possible without iterating to build a new list  You can wrap the list in a container that implements IList   You can use LINQ to get a lazy evaluated version of IEnumerable lt string gt  from an object list like this   var stringList   myList OfType lt string gt

User · Answer

If you want more control over how the conversion takes place  you can use ConvertAll   var stringList   myList ConvertAll obj   gt  obj SomeToStringMethod

User · Answer

No - if you want to convert ALL elements of a list  you ll have to touch ALL elements of that list one way or another    You can specify   write the iteration in different ways  foreach          or  ConvertAll   or whatever   but in the end  one way or another  some code is going to iterate over each and every element and convert it   Marc

User · Answer

If you want more control over how the conversion takes place  you can use ConvertAll   var stringList   myList ConvertAll obj   gt  obj SomeToStringMethod

User · Answer

If you want more control over how the conversion takes place  you can use ConvertAll   var stringList   myList ConvertAll obj   gt  obj SomeToStringMethod

[c#] Convert List(of object) to List(of string)

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