public static object ChangeType2(object value, StorageType stype, Type type, IFormatProvider formatProvider)
{
switch (stype)
{ // if destination is SQL type
case StorageType.SqlBinary:
return (SqlConvert.ConvertToSqlBinary(value));
case StorageType.SqlBoolean:
return (SqlConvert.ConvertToSqlBoolean(value));
case StorageType.SqlByte:
return (SqlConvert.ConvertToSqlByte(value));
case StorageType.SqlBytes:
return (SqlConvert.ConvertToSqlBytes(value));
case StorageType.SqlChars:
return (SqlConvert.ConvertToSqlChars(value));
case StorageType.SqlDateTime:
return (SqlConvert.ConvertToSqlDateTime(value));
case StorageType.SqlDecimal:
return (SqlConvert.ConvertToSqlDecimal(value));
case StorageType.SqlDouble:
return (SqlConvert.ConvertToSqlDouble(value));
case StorageType.SqlGuid:
return (SqlConvert.ConvertToSqlGuid(value));
case StorageType.SqlInt16:
return (SqlConvert.ConvertToSqlInt16(value));
case StorageType.SqlInt32:
return (SqlConvert.ConvertToSqlInt32(value));
case StorageType.SqlInt64:
return (SqlConvert.ConvertToSqlInt64(value));
case StorageType.SqlMoney:
return (SqlConvert.ConvertToSqlMoney(value));
case StorageType.SqlSingle:
return (SqlConvert.ConvertToSqlSingle(value));
case StorageType.SqlString:
return (SqlConvert.ConvertToSqlString(value));
/* case StorageType.SqlXml:
if (DataStorage.IsObjectNull(value)) {
return SqlXml.Null;
}
goto default;
*/
default: // destination is CLR
if ((DBNull.Value == value) || (null == value))
{
return DBNull.Value;
}
Type valueType = value.GetType();
StorageType vtype = DataStorage.GetStorageType(valueType);
// destination is CLR
switch (vtype)
{// and source is SQL type
case StorageType.SqlBinary:
case StorageType.SqlBoolean:
case StorageType.SqlByte:
case StorageType.SqlBytes:
case StorageType.SqlChars:
case StorageType.SqlDateTime:
case StorageType.SqlDecimal:
case StorageType.SqlDouble:
case StorageType.SqlGuid:
case StorageType.SqlInt16:
case StorageType.SqlInt32:
case StorageType.SqlInt64:
case StorageType.SqlMoney:
case StorageType.SqlSingle:
case StorageType.SqlString:
throw ExceptionBuilder.ConvertFailed(valueType, type);
default: // source is CLR type
if (StorageType.String == stype)
{ // destination is string
switch (vtype)
{ // source's type
case StorageType.Boolean:
return ((IConvertible)(bool)value).ToString(formatProvider);
case StorageType.Char:
return ((IConvertible)(char)value).ToString(formatProvider);
case StorageType.SByte:
return ((sbyte)value).ToString(formatProvider);
case StorageType.Byte:
return ((byte)value).ToString(formatProvider);
case StorageType.Int16:
return ((short)value).ToString(formatProvider);
case StorageType.UInt16:
return ((ushort)value).ToString(formatProvider);
case StorageType.Int32:
return ((int)value).ToString(formatProvider);
case StorageType.UInt32:
return ((uint)value).ToString(formatProvider);
case StorageType.Int64:
return ((long)value).ToString(formatProvider);
case StorageType.UInt64:
return ((ulong)value).ToString(formatProvider);
case StorageType.Single:
return ((float)value).ToString(formatProvider);
case StorageType.Double:
return ((double)value).ToString(formatProvider);
case StorageType.Decimal:
return ((decimal)value).ToString(formatProvider);
case StorageType.DateTime:
return ((DateTime)value).ToString(formatProvider);
//return XmlConvert.ToString((DateTime) value, XmlDateTimeSerializationMode.RoundtripKind);
case StorageType.TimeSpan:
return XmlConvert.ToString((TimeSpan)value);
case StorageType.Guid:
return XmlConvert.ToString((Guid)value);
case StorageType.String:
return (string)value;
case StorageType.CharArray:
return new string((char[])value);
case StorageType.DateTimeOffset:
return ((DateTimeOffset)value).ToString(formatProvider);
case StorageType.BigInteger:
break;
default:
IConvertible iconvertible = (value as IConvertible);
if (null != iconvertible)
{
return iconvertible.ToString(formatProvider);
}
// catch additional classes like Guid
IFormattable iformattable = (value as IFormattable);
if (null != iformattable)
{
return iformattable.ToString(null, formatProvider);
}
return value.ToString();
}
}
else if (StorageType.TimeSpan == stype)
{
// destination is TimeSpan
switch (vtype)
{
case StorageType.String:
return XmlConvert.ToTimeSpan((string)value);
case StorageType.Int32:
return new TimeSpan((int)value);
case StorageType.Int64:
return new TimeSpan((long)value);
default:
return (TimeSpan)value;
}
}
else if (StorageType.DateTimeOffset == stype)
{ // destination is DateTimeOffset
return (DateTimeOffset)value;
}
else if (StorageType.String == vtype)
{ // if source is string
switch (stype)
{ // type of destination
case StorageType.String:
return (string)value;
case StorageType.Boolean:
if ("1" == (string)value) return true;
if ("0" == (string)value) return false;
break;
case StorageType.Char:
return ((IConvertible)(string)value).ToChar(formatProvider);
case StorageType.SByte:
return ((IConvertible)(string)value).ToSByte(formatProvider);
case StorageType.Byte:
return ((IConvertible)(string)value).ToByte(formatProvider);
case StorageType.Int16:
return ((IConvertible)(string)value).ToInt16(formatProvider);
case StorageType.UInt16:
return ((IConvertible)(string)value).ToUInt16(formatProvider);
case StorageType.Int32:
return ((IConvertible)(string)value).ToInt32(formatProvider);
case StorageType.UInt32:
return ((IConvertible)(string)value).ToUInt32(formatProvider);
case StorageType.Int64:
return ((IConvertible)(string)value).ToInt64(formatProvider);
case StorageType.UInt64:
return ((IConvertible)(string)value).ToUInt64(formatProvider);
case StorageType.Single:
return ((IConvertible)(string)value).ToSingle(formatProvider);
case StorageType.Double:
return ((IConvertible)(string)value).ToDouble(formatProvider);
case StorageType.Decimal:
return ((IConvertible)(string)value).ToDecimal(formatProvider);
case StorageType.DateTime:
return ((IConvertible)(string)value).ToDateTime(formatProvider);
//return XmlConvert.ToDateTime((string) value, XmlDateTimeSerializationMode.RoundtripKind);
case StorageType.TimeSpan:
return XmlConvert.ToTimeSpan((string)value);
case StorageType.Guid:
return XmlConvert.ToGuid((string)value);
case StorageType.Uri:
return new Uri((string)value);
default: // other clr types,
break;
}
}
return Convert.ChangeType(value, type, formatProvider);
}
}
}
