예제 #1
0
        /// -----------------------------------------------------------------------------
        /// <summary>
        /// Generic version of CreateObject creates an object of a specified type from the
        /// provided DataRow
        /// </summary>
        /// <typeparam name="T">The type of the business object</typeparam>
        /// <param name="dr">The DataRow</param>
        /// <returns>The custom business object</returns>
        /// <remarks></remarks>
        /// -----------------------------------------------------------------------------
        private static T CreateObject <T>(DataRow dr)
        {
            PropertyInfo objPropertyInfo;
            object       objValue;
            Type         objPropertyType = null;
            int          intProperty;
            T            objObject     = Activator.CreateInstance <T>();
            ArrayList    objProperties = GetPropertyInfo(objObject.GetType());

            for (intProperty = 0; intProperty <= objProperties.Count - 1; intProperty++)
            {
                objPropertyInfo = (PropertyInfo)objProperties[intProperty]; if (objPropertyInfo.CanWrite)
                {
                    objValue = Null.SetNull(objPropertyInfo);
                    try
                    {
                        if (System.Convert.IsDBNull(dr[objPropertyInfo.Name]))
                        {
                            objPropertyInfo.SetValue(objObject, objValue, null);
                        }
                        else
                        {
                            try
                            {
                                objPropertyInfo.SetValue(objObject, dr[objPropertyInfo.Name], null);
                            }
                            catch
                            {
                                try
                                {
                                    objPropertyType = objPropertyInfo.PropertyType;
                                    if (objPropertyType.BaseType.Equals(typeof(System.Enum)))
                                    {
                                        int testint = 0;
                                        if (testint.GetType() == dr[objPropertyInfo.Name].GetType())
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, Convert.ToInt32(dr[objPropertyInfo.Name])), null);
                                        }
                                        else
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, dr[objPropertyInfo.Name]), null);
                                        }
                                    }
                                    else
                                    {
                                        objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr[objPropertyInfo.Name], objPropertyType), null);
                                    }
                                }
                                catch
                                {
                                    objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr[objPropertyInfo.Name], objPropertyType), null);
                                }
                            }
                        }
                    }
                    catch
                    {
                        objPropertyInfo.SetValue(objObject, objValue, null);
                    }
                }
            }

            return(objObject);
        }
예제 #2
0
        /// <summary>
        /// Return object based on parameters.
        /// </summary>
        /// <param name="objType">Type od datatype.</param>
        /// <param name="dr">The DataReader</param>
        /// <param name="objProperties">ArrayList</param>
        /// <param name="arrOrdinals">Array of integer.</param>
        /// <returns>Object</returns>
        private static object CreateObject(Type objType, IDataReader dr, ArrayList objProperties, int[] arrOrdinals)
        {
            PropertyInfo objPropertyInfo;
            object       objValue;
            Type         objPropertyType = null;
            int          intProperty;

            //objPropertyInfo.ToString() == BuiltyNumber
            object objObject = Activator.CreateInstance(objType);

            // fill object with values from datareader
            for (intProperty = 0; intProperty <= objProperties.Count - 1; intProperty++)
            {
                objPropertyInfo = (PropertyInfo)objProperties[intProperty];
                if (objPropertyInfo.CanWrite)
                {
                    objValue = Null.SetNull(objPropertyInfo);
                    if (arrOrdinals[intProperty] != -1)
                    {
                        if (System.Convert.IsDBNull(dr.GetValue(arrOrdinals[intProperty])))
                        {
                            // translate Null value
                            objPropertyInfo.SetValue(objObject, objValue, null);
                        }
                        else
                        {
                            try
                            {
                                // try implicit conversion first
                                objPropertyInfo.SetValue(objObject, dr.GetValue(arrOrdinals[intProperty]), null);
                            }
                            catch
                            {
                                // business object info class member data type does not match datareader member data type
                                try
                                {
                                    objPropertyType = objPropertyInfo.PropertyType;
                                    //need to handle enumeration conversions differently than other base types
                                    if (objPropertyType.BaseType.Equals(typeof(System.Enum)))
                                    {
                                        // check if value is numeric and if not convert to integer ( supports databases like Oracle )
                                        int test = 0;
                                        if (test.GetType() == dr.GetValue(arrOrdinals[intProperty]).GetType())
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, Convert.ToInt32(dr.GetValue(arrOrdinals[intProperty]))), null);
                                        }
                                        else
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, dr.GetValue(arrOrdinals[intProperty])), null);
                                        }
                                    }
                                    else if (objPropertyType.FullName.Equals("System.Guid"))
                                    {
                                        // guid is not a datatype common across all databases ( ie. Oracle )
                                        objPropertyInfo.SetValue(objObject, Convert.ChangeType(new Guid(dr.GetValue(arrOrdinals[intProperty]).ToString()), objPropertyType), null);
                                    }
                                    else
                                    {
                                        // try explicit conversion
                                        objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr.GetValue(arrOrdinals[intProperty]), objPropertyType), null);
                                    }
                                }
                                catch
                                {
                                    objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr.GetValue(arrOrdinals[intProperty]), objPropertyType), null);
                                }
                            }
                        }
                    }
                    else
                    {
                        // property does not exist in datareader
                    }
                }
            }

            return(objObject);
        }
예제 #3
0
        /// -----------------------------------------------------------------------------
        /// <summary>
        /// Generic version of CreateObject creates an object of a specified type from the
        /// provided DataReader
        /// </summary>
        /// <typeparam name="T">The type of the business object</typeparam>
        /// <param name="dr">The DataReader</param>
        /// <returns>The custom business object</returns>
        /// <remarks></remarks>
        /// <history>
        ///     [cnurse]	10/10/2005	Created
        /// </history>
        /// -----------------------------------------------------------------------------
        private static T CreateObject <T>(IDataReader dr)
        {
            PropertyInfo objPropertyInfo;
            object       objValue;
            Type         objPropertyType = null;
            int          intProperty;

            T objObject = Activator.CreateInstance <T>();

            // get properties for type
            ArrayList objProperties = GetPropertyInfo(objObject.GetType());

            // get ordinal positions in datareader
            int[] arrOrdinals = GetOrdinals(objProperties, dr);

            // fill object with values from datareader
            for (intProperty = 0; intProperty <= objProperties.Count - 1; intProperty++)
            {
                objPropertyInfo = (PropertyInfo)objProperties[intProperty];
                if (objPropertyInfo.CanWrite)
                {
                    objValue = Null.SetNull(objPropertyInfo);
                    if (arrOrdinals[intProperty] != -1)
                    {
                        if (System.Convert.IsDBNull(dr.GetValue(arrOrdinals[intProperty])))
                        {
                            // translate Null value
                            objPropertyInfo.SetValue(objObject, objValue, null);
                        }
                        else
                        {
                            try
                            {
                                // try implicit conversion first
                                objPropertyInfo.SetValue(objObject, dr.GetValue(arrOrdinals[intProperty]), null);
                            }
                            catch
                            {
                                // business object info class member data type does not match datareader member data type
                                try
                                {
                                    objPropertyType = objPropertyInfo.PropertyType;
                                    //need to handle enumeration conversions differently than other base types
                                    if (objPropertyType.BaseType.Equals(typeof(System.Enum)))
                                    {
                                        // check if value is numeric and if not convert to integer ( supports databases like Oracle )
                                        int testint = 0;
                                        if (testint.GetType() == dr.GetValue(arrOrdinals[intProperty]).GetType())
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, Convert.ToInt32(dr.GetValue(arrOrdinals[intProperty]))), null);
                                        }
                                        else
                                        {
                                            ((PropertyInfo)objProperties[intProperty]).SetValue(objObject, System.Enum.ToObject(objPropertyType, dr.GetValue(arrOrdinals[intProperty])), null);
                                        }
                                    }
                                    else
                                    {
                                        // try explicit conversion
                                        objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr.GetValue(arrOrdinals[intProperty]), objPropertyType), null);
                                    }
                                }
                                catch
                                {
                                    objPropertyInfo.SetValue(objObject, Convert.ChangeType(dr.GetValue(arrOrdinals[intProperty]), objPropertyType), null);
                                }
                            }
                        }
                    }
                    else
                    {
                        // property does not exist in datareader
                    }
                }
            }

            return(objObject);
        }