Trying to create an instance of an object dynamically

Question

Getting The following Error...

Error 1 Cannot implicitly convert type 'object' to 'CSV_OOP_Convert.FileConverter'. An explicit conversion exists (are you missing a cast?) \server\UserShares\DBell\VSC\CSV_OOP_Convert\CSV_OOP_Convert\Form1.cs 44 39 CSV_OOP_Convert

String className = cmbConversionAlgorithm.Text;
string namespaceName = "CSV_OOP_Convert";

FileConverter myObj =Activator.CreateInstance(Type.GetType(namespaceName + "." + className));
ConvertFile(myObj);

the cmbConversionAlgorithm contains the the correct name of the class I wish to create an instance of.

it works fine when I create it normally.

CSV_OOP_Convert.TFConverter tfc = new CSV_OOP_Convert.TFConverter();

`CreateInstance` returns an `object`, you need to cast: `FileConverter myObj =(FileConverter)Activator.CreateInstance(...)` — Lee, Oct 29 '15 at 10:58

score 2 · Answer 1 · answered Oct 29 '15 at 11:02

Activator.CreateInstance returns an object of type object, so it’s a completely unspecific type. In order to assign that to a variable of a more specific type, you need to make an explicit type cast:

FileConverter myObj = (FileConverter)Activator.CreateInstance(type);

score 1 · Answer 2 · answered Oct 29 '15 at 11:01

1

Activator returns an Object

Try something like this:

String className = cmbConversionAlgorithm.Text;
string namespaceName = "CSV_OOP_Convert";

Object myObj =Activator.CreateInstance(Type.GetType(namespaceName + "." + className));

ConvertFile((FileConverter)myObj);

answered Oct 29 '15 at 11:01

Morcilla de Arroz

2,104
22
29

4 equals answers... and its a Duplicate :) :) :) – Morcilla de Arroz Oct 29 '15 at 11:03

score 1 · Answer 3 · answered Oct 29 '15 at 11:06

1

Cast result to FileConverter class

var myObj =Activator.CreateInstance(Type.GetType(namespaceName + "." + className)) as FileConverter;

answered Oct 29 '15 at 11:06

Szymon D

441
2
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Trying to create an instance of an object dynamically

3 Answers3