I would like to execute a single JavaScript command from within a web
service. The command is a mathmatical statement.
I have a web page with some client side logic that does this and I'm
now moving that functionality into a web service.
To clarify - on the UI the user is collecting and entering data and
then it gets stored into the database. Most fields are input but
there are some that are calculated and stored. The calculated fields
use Java Script notation. For example the data collection might have
3 parameters, user inputs P1 and P2 and then a calculated field
storing the larger value. The calculation formula would be "Math.max
($P1$, $P2$)" The dollar signs means run-time substitution.
I can perform the string manipulation to get a statement like
"Math.max(10, 20)". Is there a way to call java to evaluate it and
get the returned value?
The existing UI piece has been in place for a long time so there are
many expressions already specified in Java syntax.
Mike Buchanan 7 2096
Hi, go****@insightfulmes.com wrote:
I would like to execute a single JavaScript command from within a web
service. The command is a mathmatical statement.
I have a web page with some client side logic that does this and I'm
now moving that functionality into a web service.
To clarify - on the UI the user is collecting and entering data and
then it gets stored into the database. Most fields are input but
there are some that are calculated and stored. The calculated fields
use Java Script notation. For example the data collection might have
3 parameters, user inputs P1 and P2 and then a calculated field
storing the larger value. The calculation formula would be "Math.max
($P1$, $P2$)" The dollar signs means run-time substitution.
I can perform the string manipulation to get a statement like
"Math.max(10, 20)". Is there a way to call java to evaluate it and
get the returned value?
The existing UI piece has been in place for a long time so there are
many expressions already specified in Java syntax.
Mike Buchanan
First, let me precise that Java has nothing to do with JavaScript (or as
much as a car had to do with a carpet).
That said, your calculation was working on the client until now. Putting
it in a web service means moving it to the server. I assume that you use
ASP.NET?
ASP.NET allows programming in JScript.NET, which has an "eval" method
that you can use for this kind of purposes. A colleague of mine does
this and it works fine. So you can program your web service in
JScript.NET, or program it in C# and link to a JScript.NET utility
assembly which would evaluate the expression and return the result.
HTH
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
PhotoAlbum: http://www.galasoft-LB.ch/pictures
Support children in Calcutta: http://www.calcutta-espoir.ch
On Feb 22, 1:49 pm, "Laurent Bugnion [MVP]" <galasoft...@bluewin.ch>
wrote:
Hi,
goo...@insightfulmes.com wrote:
I would like to execute a single JavaScript command from within a web
service. The command is a mathmatical statement.
I have a web page with some client side logic that does this and I'm
now moving that functionality into a web service.
To clarify - on the UI the user is collecting and entering data and
then it gets stored into the database. Most fields are input but
there are some that are calculated and stored. The calculated fields
use Java Script notation. For example the data collection might have
3 parameters, user inputs P1 and P2 and then a calculated field
storing the larger value. The calculation formula would be "Math.max
($P1$, $P2$)" The dollar signs means run-time substitution.
I can perform the string manipulation to get a statement like
"Math.max(10, 20)". Is there a way to call java to evaluate it and
get the returned value?
The existing UI piece has been in place for a long time so there are
many expressions already specified in Java syntax.
Mike Buchanan
First, let me precise that Java has nothing to do with JavaScript (or as
much as a car had to do with a carpet).
That said, your calculation was working on the client until now. Putting
it in a web service means moving it to the server. I assume that you use
ASP.NET?
ASP.NET allows programming in JScript.NET, which has an "eval" method
that you can use for this kind of purposes. A colleague of mine does
this and it works fine. So you can program your web service in
JScript.NET, or program it in C# and link to a JScript.NET utility
assembly which would evaluate the expression and return the result.
HTH
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog:http://www.galasoft-LB.ch
PhotoAlbum:http://www.galasoft-LB.ch/pictures
Support children in Calcutta:http://www.calcutta-espoir.ch- Hide quoted text -
- Show quoted text -
Thanks Laurent,
I don't have JScript.NET installed on my machine, but maybe I can get
it. The web service is already written in C# with this one little bit
stubbed out.
Mike Buchanan
Hi Mike,
Mike Buchanan wrote:
Thanks Laurent,
I don't have JScript.NET installed on my machine, but maybe I can get
it. The web service is already written in C# with this one little bit
stubbed out.
Mike Buchanan
The alternative would be to find a .NET JavaScript engine, but I don't
think there is one available, and honestly it would be quite overkill.
Thanks to the multi-language support in .NET, using JScript.NET for this
task seems more reasonable.
Let us know how that works out
Greetings,
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
PhotoAlbum: http://www.galasoft-LB.ch/pictures
Support children in Calcutta: http://www.calcutta-espoir.ch
On Feb 23, 1:16 am, "Laurent Bugnion [MVP]" <galasoft...@bluewin.ch>
wrote:
Hi Mike,
Mike Buchanan wrote:
Thanks Laurent,
I don't have JScript.NET installed on my machine, but maybe I can get
it. The web service is already written in C# with this one little bit
stubbed out.
Mike Buchanan
The alternative would be to find a .NET JavaScript engine, but I don't
think there is one available, and honestly it would be quite overkill.
Thanks to the multi-language support in .NET, using JScript.NET for this
task seems more reasonable.
Let us know how that works out
Greetings,
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog:http://www.galasoft-LB.ch
PhotoAlbum:http://www.galasoft-LB.ch/pictures
Support children in Calcutta:http://www.calcutta-espoir.ch
I'm using Visual Studio 2003. I found JSharp.NET, is that what you
mean?
I installed it but without any Java experience or a text book I
haven't gotten very far.
I looked around for the "eval" method but didn't see it in the
language.
What I want *seems* pretty simple, a class with one public method that
takes a JavaScript numeric expression as a string, evaluates it and
returns a number. If I could find the "eval" function then it would
be something like:
public float Eval (string inExpression)
{
return eval(inExpression);
}
Mike Buchanan
Hi,
Mike Buchanan wrote:
I'm using Visual Studio 2003. I found JSharp.NET, is that what you
mean?
No, JSharp.NET is a Java-based language, and as we all know, Java has
nothing to do with JavaScript, which is what you want.
I installed it but without any Java experience or a text book I
haven't gotten very far.
I looked around for the "eval" method but didn't see it in the
language.
I looked around, and found this page, which should help you: http://msdn2.microsoft.com/en-us/lib...5a(vs.71).aspx
The trick is that you cannot compile JScript.NET in Studio directly, you
need to compile it using the command line as explained here: http://msdn2.microsoft.com/en-us/lib...z6(VS.71).aspx
Once compiled, you get an assembly that you should be able to reference
like a normal .NET assembly. If I have time today, I'll try and write a
small example.
HTH,
Laurent
>
What I want *seems* pretty simple, a class with one public method that
takes a JavaScript numeric expression as a string, evaluates it and
returns a number. If I could find the "eval" function then it would
be something like:
public float Eval (string inExpression)
{
return eval(inExpression);
}
Mike Buchanan
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
PhotoAlbum: http://www.galasoft-LB.ch/pictures
Support children in Calcutta: http://www.calcutta-espoir.ch This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Steve Duke |
last post by:
Here is the block of the sproc that I?ve created. All lines execute
fine except for the ?exec master..xp_cmdshell @reboottc?. In order to
make this work from the query analyzer I had to set the...
|
by: BK |
last post by:
Can someone point me to a code sample that illustrates executing long
running tasks (asynchronous) from a web application in ASP.NET? I assume
that Web Services might come into play at some point,...
|
by: JulioHM |
last post by:
Hello,
Not sure if this is the right discussion group to post this, but here
it goes.
For some god-forsaken reason (which I can't find out either) MSIE
stopped executing any JavaScripts. In...
|
by: tuckkhai |
last post by:
Hi,
I am a newbie in this area. I would like to know whether is it possible to
execute shell command in windows service. I had install a program in the
server which i would like it to be executed...
|
by: Chakkaradeep |
last post by:
Hi all,
i have written a Service,now i want to execute another application (for
eg;calc.exe) in the service....how will i perform it??...
i tried using this....
/**************Executing a...
| |
by: Full Name |
last post by:
The question is not about writing javascript, but having it
execute in a browser (IE, firefox or opera, doesn't matter).
Since the last series of updates in win2K, javascript no longer
executes. ...
|
by: David R. |
last post by:
Hello all,
I would like to generate a Sql-Script-File and a Batch-File to execute the
Batch-File over C#-Code and use the SQL-File as an Input-File for the command
"osql" in the Batch-File.
I...
|
by: Sh0t2bts |
last post by:
Hi,
I am using the below command to restart a service on one of my web
boxes, this runs fine from the command prompt and also through a *.bat
file.
...
|
by: rembi |
last post by:
I am running a service (sourceforge.net/projects/statfink/ ) that
pulls and displays fantasy football statistics. One of the
limitations is that it only pulls stats for games that are active or...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
| |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence...
| |