Question

In the BLL class, I have written:

Private List<T> GetData(string a, string b)
{
   TryAction(()=>{
      //Call BLL Method to retrieve the list of BO.
       return BLLInstance.GetAllList(a,b);
    });
}

In the BLL Base Class, I have a method:

protected void TryAction(Action action)
{
 try
 {
   action();
 }
 catch(Exception e)
 {
   // write exception to output (Response.Write(str))
 }
}

How can I use TryAction() method with generic return type?
please have a suggestion.

Answer 1

You need to use Func to represent a method which will return a value.

Below is an example

    private List<int> GetData(string a, string b)
    {
        return TryAction(() =>
        {
            //Call BLL Method to retrieve the list of BO.
            return BLLInstance.GetAllList(a,b);
        });
    }


    protected TResult TryAction<TResult>(Func<TResult> action)
    {
        try
        {
            return action();
        }
        catch (Exception e)
        {
            throw;
            // write exception to output (Response.Write(str))
        }
    }