how to pass Enum

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kjqua - 29 Jun 2007 06:38 GMT

Hi all,

I am newbie in c# and i have a question.

I try to work with serial port.
and i will like to configure the serial port by a form

I add in a ComboBox.parity some items like:
None
Odd
Even
Mark
Space

then i will like to pass the item value to serialPort.parity
serialPort.parity = cmbParity.SelectedItem
how can i do ?

thanks
Marco

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Alberto Poblacion - 29 Jun 2007 07:48 GMT

> I add in a ComboBox.parity some items like:
> None
[quoted text clipped - 6 lines]
> serialPort.parity = cmbParity.SelectedItem
> how can i do ?

You can convert text into enum values using the static method Enum.Parse:

serialPort.parity = Enum.Parse(typeof(System.IO.Ports.Parity),
cmbParity.SelectedItem);

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Ben Voigt [C++ MVP] - 29 Jun 2007 08:14 GMT

>> I add in a ComboBox.parity some items like:
>> None
[quoted text clipped - 11 lines]
> serialPort.parity = Enum.Parse(typeof(System.IO.Ports.Parity),
> cmbParity.SelectedItem);

Enum.Parse returns object, you still need a cast:

serialPort.Parity =
(System.IO.Ports.Parity)Enum.Parse(typeof(System.IO.Ports.Parity),
cmbParity.SelectedItem);

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kjqua - 30 Jun 2007 08:53 GMT

Ben Voigt [C++ MVP] ha scritto:

>>> I add in a ComboBox.parity some items like:
>>> None
[quoted text clipped - 17 lines]
> (System.IO.Ports.Parity)Enum.Parse(typeof(System.IO.Ports.Parity),
> cmbParity.SelectedItem);

Hi,
I try both code but they don't work
i have this message error
The best overloaded method match for 'System.Enum.Parse(System.Type,
string)' has some invalid arguments
Argument '2': cannot convert from 'object' to 'string'

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Jon Skeet [C# MVP] - 30 Jun 2007 10:43 GMT

> I try both code but they don't work
> i have this message error
> The best overloaded method match for 'System.Enum.Parse(System.Type,
> string)' has some invalid arguments
> Argument '2': cannot convert from 'object' to 'string'

So cast cmbParity.SelectedItem to a string in the call...

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kjqua - 30 Jun 2007 11:30 GMT

Jon Skeet [C# MVP] ha scritto:

>> I try both code but they don't work
>> i have this message error
[quoted text clipped - 3 lines]
>
> So cast cmbParity.SelectedItem to a string in the call...

Thanks now it work
serialPort.Parity =
(System.IO.Ports.Parity)Enum.Parse(typeof(System.IO.Ports.Parity),
cmbParity.SelectedItem.ToString());

marco

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how to pass Enum

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