dynamically created object properties

[Neil Chambers]

I would like to pass an array of strings to an object and have the object
members built using the array items as property names. How would I go about
doing this?

Example:

public class myDynamicObject
{
public myDynamicObject (string[] memberNames)
{
foreach (string s in memberNames)
{
//make s a public property of the object
//assign a value to s
}
}
}

Many thanks!
neil

[Jon Skeet [C# MVP]]

Re: dynamically created object properties

On Sep 25, 2:59 pm, "Neil Chambers" <nos...@nospam. comwrote:

I would like to pass an array of strings to an object and have the object
members built using the array items as property names. How would I go about
doing this?

You can't - types don't change on the fly; you can't add a property to
an object.

What's the use case here? Is there anything that a simple
Dictionary<stri ng, objectwouldn't solve?

Jon

[=?Utf-8?B?Q2lhcmFuIE8nJ0Rvbm5lbGw=?=]

RE: dynamically created object properties

This isnt a simple thing to do in C# as it isnt a dynamic language. You would
need to use the classes in the Reflection.Emit language to build the class.
This is complex stuff and I havent found a need to ever do it.
Google Reflection.Emit and you should come up with some answers
If you want, let us know what you are trying to acheive in terms of the big
picture as there might be and easier way

--
Ciaran O''Donnell

http://wannabedeveloper.spaces.live.com

"Neil Chambers" wrote:

I would like to pass an array of strings to an object and have the object
members built using the array items as property names. How would I go about
doing this?
>
Example:
>
public class myDynamicObject
{
public myDynamicObject (string[] memberNames)
{
foreach (string s in memberNames)
{
//make s a public property of the object
//assign a value to s
}
}
}
>
Many thanks!
neil
>
>

[Marc Gravell]

Re: dynamically created object properties


Can you clarify what you want to do?

If you want to assign values to already-existing properties, then
reflection is your friend; or System.Componen tModel:

TypeDescriptor. GetProperties(o bj)["PropName"].SetValue(obj, newValue);

is broadly equivalent to:
obj.PropName = newValue;

If the properties don't already exist and you want runtime-only
properties, then you are into a more complex area of custom type
descriptors... it can work, but is mainly useful for data-binding to UIs
etc. I can provide more info, but I'd prefer to know that this is what
you meant, first...

Marc

[Ignacio Machin ( .NET/ C# MVP )]

Re: dynamically created object properties

On Sep 25, 9:59 am, "Neil Chambers" <nos...@nospam. comwrote:

I would like to pass an array of strings to an object and have the object
members built using the array items as property names. How would I go about
doing this?
>
Example:
>
public class myDynamicObject
{
public myDynamicObject (string[] memberNames)
{
foreach (string s in memberNames)
{
//make s a public property of the object
//assign a value to s
}
}
>
}
>
Many thanks!
neil

You cannot.
What you can do is having one property or one method taht return the
value you want.
you could have
string GetPropertyValu e(string propertyName)
or if you do not mind using an indexer you can have:
string this[string propertyName]
n this case you access it by using
myInstance["propertyNa me"]

You can hold your property/values pairs in a dictionary.