Question

What is the difference in utility/performance between using PersistenceMode on a property and storing the value of said property in ViewState in an ASP.NET web page?

This:

    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [PersistenceMode(PersistenceMode.InnerProperty)]
    public int ClientUno { get; private set; }

versus this:

    public int ClientUno
    {
        get
        {
            if (ViewState["ClientUno"] == null) return 0;
            else return (int)(ViewState["ClientUno"]);
        }
        set { ViewState["ClientUno"] = value; }
    }

I have done some googling around the internets and can’t figure this one out. It seems like this would have come up before – I just can’t find the answer. Anyone?

Answer 1

PersistanceMode has nothing to do with storing data in a ViewState. It is used to create custom server controls and affects server code.
For example see: How do I make a control with a child control collection in ASP.Net