Question : C #DBNULL

Hi Experts
In one of my recents questions regaring passing of DBNULL to Oracle DB based on user input, I was suggested to use as follows

object GetDBValue(object value)
{
    return value == null ? DBNull.Value : value;
}

Purpose of this is, when I save data, I pass user input to this function. If input is null it returns DBNull. This is working fine as far as string is concerned. But in Numbers I have a problem it does not work. Example I cant write as follows

Convert.ToInt32(ValidateUI.GetDbValue(cmbcityid.SelectedValue));

So what is the way out for numbers ?

Answer : C #DBNULL

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