Binding dropdownlist inside gridview edititemtemplate

Question

I\'m not able to bind my dropdownlist present in edititem template . I am getting null reference when i try to access it.

My design:

Answer 1

I do it like this. In which, Name and Id are two fields of Company object:

HTML Code:

C# code behind:

protected IEnumerable PopulateddlCompanyEdit()
{
    using (var bkDb = new BrickKilnDb())
    {
        return bkDb.Companies.ToList();
    }
}