error 1061. T doesn't contain a definition for <propertyName>

i am having around 7 models who have same properties(atributes). On view page i am using a model(name = commonModel) which contains all those properties and a extra property to choose in which model's database i want to save that sent data so i created a valuesRelocate Method that will assign all the properties of commonModel to the choosen model (in this case article). The code i gave below is working but i am getting a error when assigning value of a property of commonModel to a property of article. What is the better way to do this. Error is at tempModel.question

    public ActionResult Create([Bind(Include = 
   "Id,question,ans,ruleApplicable,hint,exception,modelSelector")] 
   commonModel commonModel)
    {
        if (ModelState.IsValid)
        {

            if (commonModel.modelSelector == "article")
            {
                article model2 = new article();
                article model1 = valuesRelocate<article>(commonModel, 
   model2);
                db.articleDb.Add(model1);
                db.SaveChanges();
                return RedirectToAction("Index");
            }
        }

            return View(commonModel);
    }

    private T valuesRelocate<T>(commonModel commonModel, T tempModel)   {

        tempModel.question = commonModel.question;
        return tempModel;
    }

I am using a abstract base class named baseGrammar .code for both the class is shown below

 public abstract class baseGrammar
{
    [Key]
    public int Id { get; set; }
    [Required]
    public string question { get; set; }
    [Required]
    public string ans { get; set; }
    public string ruleApplicable { get; set; }
    public string hint { get; set; }
    public bool exception { get; set; }
}

the one shown above is base class and those shown below are derived classes i use different classes because i wanted to have different classes for different grammatical concepts.

public class article : baseGrammar
{

}

 public class commonModel : baseGrammar
{
    [Required]
    public string modelSelector { get; set; }
}

hope this helps.

Jon Skeet
people
quotationmark

You just need to constrain the type parameter T to be derived from your base class:

// Names changed to follow .NET naming conventions
private T RelocateValues<T>(BaseGrammar baseModel, T tempModel)
    where T : BaseGrammar
{
    tempModel.question = baseModel.question;
    return tempModel;
}

However, given that you're modifying the incoming model, you could remove the return value and just change the method to:

private void RelocateValues(BaseGrammar from, BaseGrammar to)
{
    to.question = from.question;
}

Then in your calling code:

Article model = new Article();
RelocateValues(model);
db.ArticleDb.Add(model);

There's no need to have two separate variables which will refer to the same object anyway...

people

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