Boolean Parse string

[=?Utf-8?B?ZGF2ZWJ5dGhlc2Vh?=]

Hi folks,

Boolean.Parse("true") returns true, but what if you need to parse something
such as -

Boolean.Parse("(false && false) || (false || (true && true))");

Does something exist in the .NET framework to Parse this kind of string to
one final boolean result?

Thanks for any tips,
David

[=?Utf-8?B?UGV0ZXIgQnJvbWJlcmcgW0MjIE1WUF0=?=]

Dave,
I suppose I must be reallyreallydumb, but why on earth would you ever need
to do this? If its a legitimate business logic need, you could write a
method that would be capable of parsing these expressions and returning bool.
-- Peter
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"davebythesea" wrote:

Hi folks,

Boolean.Parse("true") returns true, but what if you need to parse something
such as -

Boolean.Parse("(false && false) || (false || (true && true))");

Does something exist in the .NET framework to Parse this kind of string to
one final boolean result?

Thanks for any tips,
David

[Bob Powell [MVP]]

The Parse methods for the common value types are there to convert a simple
string to the value. Evaluating expressions is not within its range of
capabilities.

You can write your own expression parser...

--
--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

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"davebythesea" <da**********@discussions.microsoft.comwrote in message
news:6A**********************************@microsof t.com...

Hi folks,

Boolean.Parse("true") returns true, but what if you need to parse
something
such as -

Boolean.Parse("(false && false) || (false || (true && true))");

Does something exist in the .NET framework to Parse this kind of string to
one final boolean result?

Thanks for any tips,
David

[=?UTF-8?B?QXJuZSBWYWpow7hq?=]

davebythesea wrote:

Boolean.Parse("true") returns true, but what if you need to parse something
such as -

Boolean.Parse("(false && false) || (false || (true && true))");

Does something exist in the .NET framework to Parse this kind of string to
one final boolean result?

That is not parsing. That is would be runtime expression evaluation.

It can be done. But it will have some overhead and some security
implications.

Are you sure that you need this ?

(I do have some code snippets if you really need it)

Arne

[=?Utf-8?B?ZGF2ZWJ5dGhlc2Vh?=]

Hi folks,

Thanks for all your help. I'm going to have a think about all thats been
said and work out my approach. Once (if) I make some progress I may come back
and ask a couple more questions...

Cheers,
Dave

"Arne Vajhøj" wrote:

davebythesea wrote:

Boolean.Parse("true") returns true, but what if you need to parse something
such as -

Boolean.Parse("(false && false) || (false || (true && true))");

Does something exist in the .NET framework to Parse this kind of string to
one final boolean result?

That is not parsing. That is would be runtime expression evaluation.

It can be done. But it will have some overhead and some security
implications.

Are you sure that you need this ?

(I do have some code snippets if you really need it)

Arne