I want to declare a list containing types basically:
List<Type> types = new List<Type>() {Button, TextBox };
is this possible?
views:
157answers:
5
+2
A:
Yes, use List<System.Type>
var types = new List<System.Type>();
To add items to the list, use the typeof keyword.
types.Add(typeof(Button));
types.Add(typeof(CheckBox));
Matt Brunell
2009-10-23 20:30:01
I get an error : "Button is type but is used as a variable"
Luiscencio
2009-10-23 20:31:15
+17
A:
Try this:
List<Type> types = new List<Type>() { typeof(Button), typeof(TextBox) };
The typeof() operator is used to return the System.Type of a type.
For object instances you can call the GetType() method inherited from Object.
Yannick M.
2009-10-23 20:30:59
A slight variation of the scenario for posterity: if you have an instance/object and want to include its type in the same list use the object's .GetType() property -- e.g. see 'myButton' variable usage in the following:Button myBtn = new Button();List<Type> types = new List<Type>() { myBtn.GetType(), typeof(TextBox) };
John K
2009-10-23 20:36:58
If this is declared somewhere else than in a method body type the var keyword isn't available. But yes you could (and should) use var in a method.
Yannick M.
2009-10-23 20:37:35
Change the decleration to use var, and you have my down-vote. :P
Yuriy Faktorovich
2009-10-23 20:38:15
+9
A:
You almost have it with your code. Use typeof and not just the name of the type.
List<Type> types = new List<Type>() {typeof(Button), typeof(TextBox) };
Adam Sills
2009-10-23 20:31:00
+2
A:
List<Type> types = new List<Type>{typeof(String), typeof(Int32) };
You need to use the typeof keyword.
Greg
2009-10-23 20:32:00