Hi Metro,
Thanks for your feedback.
I think our discussion already shows that in C# the bool type's value are
true and false, while the bool type is mapping to the .Net Framework
Boolean type and its value are True and False.
Does this answer your question?
Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! -
www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------
| From: "Metro Sauper" <ms*****@sauper.com>
| References: <O2**************@TK2MSFTNGP09.phx.gbl>
<uL**************@TK2MSFTNGP12.phx.gbl>
<MP************************@msnews.microsoft.com >
<NF**************@cpmsftngxa06.phx.gbl>
| Subject: Re: Ask a Language Designer: boolean: C# vs. Xml
| Date: Sat, 25 Oct 2003 01:19:47 -0400
| Lines: 111
| X-Priority: 3
| X-MSMail-Priority: Normal
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| Message-ID: <#C**************@TK2MSFTNGP10.phx.gbl>
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| Xref: cpmsftngxa06.phx.gbl microsoft.public.dotnet.languages.csharp:193972
| X-Tomcat-NG: microsoft.public.dotnet.languages.csharp
|
| The specific issue that brought this to mind is as follows:
|
| We are using xml to store some default configuration for reports. An xml
| entry might appear as follows:
|
| <Parameter Name="ShowDetail" Type="System.Boolean" Value="true" />
|
| Now normally with xml, we use "XmlConvert.ToBoolean(string)" to convert
| values from xml to the specific datatype, in this case boolean.
|
| However, because the datatype is defined in the entry and not predefined,
I
| wanted to use the Convert.ChangeType() method to evaluate the entry.
| Somthing like:
|
| object parameterValue =
Convert.ChanageType(node.Attributes["Value"].Value,
| System.GetType(node.Attributes[Type].Value));
|
| However, this did not work because we configured the value as "true"
rather
| than "True". So now our configuration xml has "true/false" everywhere
there
| are boolean values EXCEPT for the parameter values where the value is
| "True/False" since we use the XmlConvert for all values other than the
ones
| where we would like to use Convert.ChangeType().
|
| Now, I know how to solve the problem. There are lots of ways to solve it.
| That is not the question. I posed the question after reading the other
"Ask
| a Language Designer" questions and responded to the offer to post a
question
| here.
|
| The question is "Why are the default text representations for boolean
| different in .Net and XML?"
|
| Thank you for you consideration of this question.
|
| Metro T. Sauper, Jr.
| President
| Sauper Associates, Inc.
|
| ""Jeffrey Tan[MSFT]"" <v-*****@online.microsoft.com> wrote in message
| news:NF**************@cpmsftngxa06.phx.gbl...
| >
| > Hi,
| >
| > I think the true, false in C# are the type value of C#, and it is the
| > mapping of .Net Framework type value. While in .Net, this type value is
| > True and False.
| > This is similiar as the int vs Int32, string vs String type mapping
| > relationship.
| >
| > Hope this help,
| >
| > Jeffrey Tan
| > Microsoft Online Partner Support
| > Get Secure! -
www.microsoft.com/security
| > This posting is provided "as is" with no warranties and confers no
rights.
| >
| > --------------------
| > | From: Jon Skeet [C# MVP] <sk***@pobox.com>
| > | Subject: Re: Ask a Language Designer: boolean: C# vs. Xml
| > | Date: Fri, 24 Oct 2003 18:55:27 +0100
| > | Message-ID: <MP************************@msnews.microsoft.com >
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| > <uL**************@TK2MSFTNGP12.phx.gbl>
| > | MIME-Version: 1.0
| > | Content-Type: text/plain; charset="iso-8859-1"
| > | Content-Transfer-Encoding: 7bit
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| > | Newsgroups: microsoft.public.dotnet.languages.csharp
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| > 81.103.154.143
| > | Lines: 1
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| > | Xref: cpmsftngxa06.phx.gbl
| microsoft.public.dotnet.languages.csharp:193868
| > | X-Tomcat-NG: microsoft.public.dotnet.languages.csharp
| > |
| > | Greg Ewing [MVP] <gewing@_NO_SPAM_citidc.com> wrote:
| > | > Metro, I'm not sure what you mean by the default text representation
| of
| > a
| > | > boolean.
| > |
| > | Try this:
| > |
| > | using System;
| > |
| > | public class Test
| > | {
| > | static void Main()
| > | {
| > | Console.WriteLine (true.ToString());
| > | Console.WriteLine (false.ToString());
| > | }
| > | }
| > |
| > | That prints:
| > |
| > | True
| > | False
| > |
| > | I'm pretty sure that's what the OP was talking about.
| > |
| > | It's not C# that does this, of course, but .NET itself.
| > |
| > | --
| > | Jon Skeet - <sk***@pobox.com>
| > |
http://www.pobox.com/~skeet
| > | If replying to the group, please do not mail me too
| > |
| >
|
|
|
