Possible Duplicate:
C# eval equivalent?Duplicate of How can I evaluate C# code dynamically?
How can we Implement JS eval() in C# If possible provide an example.. thank you
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C# eval equivalent?rahul– rahul2009-08-11 12:31:53 +00:00Commented Aug 11, 2009 at 12:31
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stackoverflow.com/questions/4629/c-eval-equivalentMr. Smith– Mr. Smith2009-08-11 12:31:59 +00:00Commented Aug 11, 2009 at 12:31
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Can you include to project MSScript.dll, if so I would provide an answerDewfy– Dewfy2009-08-11 12:32:09 +00:00Commented Aug 11, 2009 at 12:32
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a = "<<x>>/100"; a.replace("<<x>>","20"); string b = eval(a); i should get .2 as result how can i do it in C# without using JScript is it possible? to replace eval(a);Preetham– Preetham2009-08-11 13:13:03 +00:00Commented Aug 11, 2009 at 13:13
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Possible duplicate of How can I evaluate C# code dynamically?Cœur– Cœur2018-07-09 14:26:28 +00:00Commented Jul 9, 2018 at 14:26
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3 Answers
You can actually use the JScript eval function from C#...
Create a file JsMath.js, with the following JScript code :
class JsMath
{
static function Eval(expression : String) : double
{
return eval(expression);
};
}
Compile it into a DLL :
jsc /t:library JsMath.js
Add a reference to JsMath.dll to your project. You can now use the JsMath class in your code :
double result = JsMath.Eval(expression);
1 Comment
gavi
This is very practical solution for quick evaluations in any .NET language. You just need to include a reference to Microsoft.JScript.dll also.
If you can use C# 3.0 / .NET 3.5, there's a sample of a fully operational expression parser in C# Samples for Visual Studio 2008 at MSDN Code Gallery, under DynamicQuery. This makes it possible not just to evaluate single expressions, but even to create functions (delegates) from them, or LINQ expressions. (The LinqDataSource control uses a slightly modified version of this sample internally.)
Comments
Go to http://json.org/ and scroll to the bottom. Look for C# in the left column.
