Convert String input to working VB code

Question

Is it possible to convert, say, a textbox input to working code?

For example, user types 'if x<10 then y=2 else y=5' into textbox1, it gets used directly as code something like ...

dim x as integer = 5
dim y as integer = 0
include processed textbox1.text
resultbox.text = (y*20).tostring

It's not important why this would be needed - just whether there is any straight-forward method that parses a string to code.

Many thanks.

Does it have to run as code as it is, or can you parse the input text to get the required parts and act on them as appropriate? — Andrew Morton
– Andrew Morton, Commented Feb 24, 2015 at 11:40

Alu · Accepted Answer · 2015-02-24 11:34:17Z

0

Maybe this is what you are looking for:

http://www.codeproject.com/Articles/12852/Compile-and-Run-VB-NET-Code-using-the-CodeDom

answered Feb 24, 2015 at 11:34

Alu

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2 Comments

RobertyBob Over a year ago

Thanks Alu. As with Matt's suggestion below I'll have to work through the demo for this to see exactly what it does. I was keeping fingers crossed for a simple 'compileThis' kinda class but looks like will be a significant amount of investigating :)

RobertyBob Over a year ago

I'm currently working through this and looking at implementing it within my form. Hopefully all goes smoothly. Many thanks again.

Matt Wilko · Accepted Answer · 2015-02-24 11:38:44Z

0

yes you can do this using the VBCodeProvider class. Although the amount of code required is quite significant:

http://www.codeproject.com/Articles/5472/Compiling-NET-code-on-the-fly

answered Feb 24, 2015 at 11:38

Matt Wilko

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2 Comments

RobertyBob Over a year ago

Thanks Matt - this looks a bit over my head at the moment but could well be what I need. I'll try to run through the demo tomorrow to see if it becomes clearer when running an actual test.

RobertyBob Over a year ago

I've had a look at this and the VBCodeProvider does indeed seem to be what I need. This link will help others with similar issues though I think Alu's link is more suitable for my personal abilities and needs. Many thanks again for confirming the feasibility of this.

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