How to make generic List for bool, Int16 , string in the following code? class myClass { string _dataType; public List _list; public myClass(string dataType) { _dataType=dataType; if (dataType=="bool") _list=new List (); else if (dataType=="int16") _list=new List (); else if (dataType == "string") _list=new List (); else _list = new List (); } } Error: Cannot implicitly convert type 'System.Collections.Generic.List ' to 'System.Collections.Generic.List '

Consider applying the generic to your class if you want to encapsulate the generic list. Eg: public class myClass { private List _list = new List (); // Implement your code here using "T" as your type where needed rather than worrying about hard-coded types. } You can also restrict the types that your class supports. Eg: To restrict it to Int, Bool, or String public class myClass where T : int, bool, string

I don't think you can do this. Templates are thought of as creating types at pre-compile time so the code here doesn't really make sense. what are you trying to do and perhaps we can suggest another means? best -Mike

Answers

How to make List work?

van tive

17y

2.2k

How to make generic List<T> for bool, Int16 , string in the following code?

class myClass
{
string _dataType;
public List<Object> _list;
public myClass(string dataType)
{
_dataType=dataType;

if (dataType=="bool")
    _list=new List<bool>();
else if (dataType=="int16")
   _list=new List<Int16>();
else if (dataType == "string")
   _list=new List<string>();
else
   _list = new List<Object>();
}
}

Error: Cannot implicitly convert type 'System.Collections.Generic.List<bool>' to 'System.Collections.Generic.List<object>'