Question

Is it possible to do the same using Lambda

for (int i = 0; i < objEntityCode.Count; i++)
{
    options.Attributes[i] = new EntityCodeKey();
    options.Attributes[i].EntityCode = objEntityCode[i].EntityCodes;
    options.Attributes[i].OrganizationCode = Constants.ORGANIZATION_CODE;
}

I mean to say to rewrite the statement using lambda. I tried with

Enumerable.Range(0,objEntityCode.Count-1).Foreach(i=> { 
    options.Attributes[i] = new EntityCodeKey(); 
    options.Attributes[i].EntityCode = objEntityCode[i].EntityCodes; 
    options.Attributes[i].OrganizationCode = Constants.ORGANIZATION_CODE; }
);

but not working
I am using C#3.0

Answer 1

Well you can make it simpler with object initializers, to start with:

for (int i = 0; i < objEntityCode.Count; i++)
{
    options.Attributes[i] = new EntityCodeKey
    {
        EntityCode = objEntityCode[i].EntityCodes,
        OrganizationCode = Constants.ORGANIZATION_CODE
    };
}

I would probably leave it at that though… there’s currently no ForEach extension method on IEnumerable<T> – and for good reasons, although I know it’s not a universally held opinion 😉

In this case, you’d still need to know i in order to set options.Attributes[i] – unless you could set the whole of options.Attributes in one go, of course… without knowing about the types involved, it’s pretty hard to advise further.

If options.Attributes is a writable property (e.g. an array), you could use:

options.Attributes = objEntityCode.Select(code => new EntityCodeKey
    {
        EntityCode = code.EntityCodes,
        OrganizationCode = Constants.ORGANIZATION_CODE
    }).ToArray();

If options.Attributes is actually just a property which returns a type with an indexer, that won’t work.