Dynamically create an array and set the elements

Question

This can create an array dynamically:

Assembly asm = object.GetType().Assembly;
string sTypeName = "Company.Namespace.ClassName";
object arrayWithSize1 = Activator.CreateInstance( asm.GetType(sTypeName), 1 );

But how does set the first element of array which is created above?

Ani · Accepted Answer · 2012-01-26 17:04:49Z

14

You can use Array.SetValue:

 // How are you going to create this? Activator.CreateInstance?
 object instance = ...

 // Create one-dimensional array of length 1.
 Array arrayWithSize1  = Array.CreateInstance(asm.GetType(sTypeName), 1);

 // Set first (only) element of the array to the value of instance.
 arrayWithSize1.SetValue(instance, 0);

answered Jan 26, 2012 at 17:04

Ani

114k27 gold badges269 silver badges313 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

millimoose · Accepted Answer · 2012-01-26 17:20:48Z

8

You can just use the dynamic keyword to make the code more readable than reflection calls:

var arrayType = typeof(int);
dynamic array = Array.CreateInstance(arrayType, 1);
array[0] = 123;

answered Jan 26, 2012 at 17:20

millimoose

40.1k11 gold badges89 silver badges138 bronze badges

Collectives™ on Stack Overflow

Dynamically create an array and set the elements

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related