DataBase Convert Class

一个很小的MySql数据格式转化方法类，做数据库相关的开发因该会用到，记下来以备后用：

public static class DbConvert
    {
        public static int ToInt32(DataRow dataRow, string columnName)
        {
            if (dataRow[columnName] != DBNull.Value)
            {
                return Convert.ToInt32(dataRow[columnName]);
            }
            else
            {
                return 0;
            }

        }

        public static double ToDouble(DataRow dataRow, string columnName)
        {
            if (dataRow[columnName] != DBNull.Value)
            {
                return Convert.ToDouble(dataRow[columnName]);
            }
            else
            {
                return 0;
            }            

        }

        public static int ToInt32(object input)
        {
            if (input == null)
            {
                return 0;
            }
            return Convert.ToInt32(input);
        }

        public static string ToString(DataRow dataRow, string columnName)
        {
            if (dataRow[columnName] != DBNull.Value)
            {
                return dataRow[columnName].ToString();
            }
            else
            {
                return null;
            }
            
        }

        public static bool ToBoolean(DataRow dataRow, string columnName)
        {
            if (dataRow[columnName] != DBNull.Value)
            {
                return Convert.ToBoolean(dataRow[columnName]);            
            }
            else
            {
                return false;
            }
        }

        public static DateTime ToDateTime(DataRow dataRow, string columnName)
        {
            if (dataRow[columnName] != DBNull.Value)
            {
                return Convert.ToDateTime(dataRow[columnName]);
            }
            else
            {
                return DateTime.MinValue;
            }

        }

    }