in c#: expression evaluation function like flash script

Question

Duplicate of: How can I evaluate a C# expression dynamically?

How to evaluate expression. Maybe like:

int a=1;
int b=3;
int c=Eval("a+b");

or

int c=int.parse("1+3*(2+3)");

This seems stupid to me. is it possible in c#?

score 7 · Accepted Answer · answered Feb 11 '09 at 00:17

7

You can take code, and using the CSharpCodeProvider write an Eval function that actually compiles your code into an in-memory assembly and then executes that code.

See this CodeProject article for sample source.

answered Feb 11 '09 at 00:17

joshperry

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This works, but it produces a new assembly, so while you can use it to eval logical statements, you can't use it for metaprogramming. This is coming in C#5 (see anders's PDC2008 talk on the future of C#) – Orion Edwards Feb 11 '09 at 00:48

score 2 · Answer 2 · edited Feb 11 '09 at 00:19

2

Not directly. C# contains no runtime compiler. There is an open source project attached to Mono that will do this.

edited Feb 11 '09 at 00:19

Shog9

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answered Feb 11 '09 at 00:16

thinkbeforecoding

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score 0 · Answer 3 · answered Oct 07 '18 at 05:54

I enumerate several different approaches that I am aware of in this answer to "How can I evaluate a C# expression dynamically" which include various .NET framework solutions such as CodeDomProvider, DataBinder.Eval, DataTable.Compute, Document.InvokeScript, and more.

in c#: expression evaluation function like flash script

Duplicate of: How can I evaluate a C# expression dynamically?

3 Answers3

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