Display/Store and Retrieve Image Data from Database to Gridview, and also on Mouse Over

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Tools
{
    public class Tools
    {
        public static int IifInt(object obj)
        {
            if (obj != null)
            {
                return Convert.ToInt32(obj);
            }
            return 0;
        }
        public static int IifInt(string obj)
        {
            if (obj == string.Empty)
            {
                 return 0;
            }
            if (obj != null)
            {
                return Convert.ToInt32(obj);
            }
            return 0;
        }

        public static double IifDbl(object obj)
        {
            if (obj != null)
            {
                return Convert.ToDouble(obj);
            }
            return 0.00;
        }
        public static double IifDbl(string obj)
        {
            if (obj != null)
            {
                return Convert.ToDouble(obj);
            }
            return 0.00;
        }

        public static string IifStr(object obj)
        {
            if (obj != null)
            {
                return Convert.ToString(obj);
            }
            return string.Empty;
        }
        public static DateTime IifDT(object obj)
        {
            var retVal = Convert.ToDateTime("01/01/01");
            if (obj != null)
            {
                try
                {
                    retVal = Convert.ToDateTime(obj);
                }
                catch (Exception)
                {
                    return retVal;
                }
            }
            return retVal;
        }
    }
}