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calling math functions at run timeI don't know how to ask this so that someone will not misread it but here
goes. At run time I want to be able to evaluate functions from the Math library, but at design time I do not know what functions will be needed. I know I can do If Userinput = "SINE" Then zz = Sin(whatever) but what I want to do is zz= MyMappingToMath(userinput) e.g Suppose the user inputs SINE(30) at run time Is there some way I can get the value of SINE(30) if I made no special provisions for SINE at design time? Thanks If I understand you correctly,
you could: 1. Create functions and/or operator overloads that define your syntax, 2. Let the user provide the code and compile it to memory on the fly, I mean the Activator.CreateInstance stuff and so on (this requires some little familiarity with reflection, CodeDOM, delegates ... ) http://www.thescripts.com/forum/thread348196.html .... Franky ha scritto: Show quoteHide quote > I don't know how to ask this so that someone will not misread it but here > goes. > > At run time I want to be able to evaluate functions from the Math library, > but at design time I do not know what functions will be needed. > > I know I can do > > If Userinput = "SINE" Then zz = Sin(whatever) > > but what I want to do is zz= MyMappingToMath(userinput) > > e.g > Suppose the user inputs SINE(30) at run time > Is there some way I can get the value of SINE(30) if I made no special > provisions for SINE at design time? > > Thanks I looked at that site and need to study it more but do I understand
correctly that I could, at run time, actually run a little Basic program inputted by the user? Thanks a lot <tommaso.gasta***@uniroma1.it> wrote in message Show quoteHide quote news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... > If I understand you correctly, > > you could: > 1. Create functions and/or operator overloads that define your > syntax, > 2. Let the user provide the code and compile it to memory on the fly, > > I mean the Activator.CreateInstance stuff and so on > (this requires some little familiarity with reflection, CodeDOM, > delegates ... ) > > http://www.thescripts.com/forum/thread348196.html > ... > > Franky ha scritto: > >> I don't know how to ask this so that someone will not misread it but here >> goes. >> >> At run time I want to be able to evaluate functions from the Math >> library, >> but at design time I do not know what functions will be needed. >> >> I know I can do >> >> If Userinput = "SINE" Then zz = Sin(whatever) >> >> but what I want to do is zz= MyMappingToMath(userinput) >> >> e.g >> Suppose the user inputs SINE(30) at run time >> Is there some way I can get the value of SINE(30) if I made no special >> provisions for SINE at design time? >> >> Thanks > RIght you can compile any source program. You could define another
language if you wanted to :) You need a couple days digging into the codedom and looking at the samples on the internet. VB.NET makes it very "easy", after all ... Franky ha scritto: Show quoteHide quote > I looked at that site and need to study it more but do I understand > correctly that I could, at run time, actually run a little Basic program > inputted by the user? > > > Thanks a lot > > <tommaso.gasta***@uniroma1.it> wrote in message > news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... > > If I understand you correctly, > > > > you could: > > 1. Create functions and/or operator overloads that define your > > syntax, > > 2. Let the user provide the code and compile it to memory on the fly, > > > > I mean the Activator.CreateInstance stuff and so on > > (this requires some little familiarity with reflection, CodeDOM, > > delegates ... ) > > > > http://www.thescripts.com/forum/thread348196.html > > ... > > > > Franky ha scritto: > > > >> I don't know how to ask this so that someone will not misread it but here > >> goes. > >> > >> At run time I want to be able to evaluate functions from the Math > >> library, > >> but at design time I do not know what functions will be needed. > >> > >> I know I can do > >> > >> If Userinput = "SINE" Then zz = Sin(whatever) > >> > >> but what I want to do is zz= MyMappingToMath(userinput) > >> > >> e.g > >> Suppose the user inputs SINE(30) at run time > >> Is there some way I can get the value of SINE(30) if I made no special > >> provisions for SINE at design time? > >> > >> Thanks > > I'll look into it. I see much to read about it.
BTW - maybe you know Is there any documentation about MSScriptControl.ScriptControlClass I can't find out what properties and methods are available. Do you know where they are documented. Thanks for telling me about codedom <tommaso.gasta***@uniroma1.it> wrote in message Show quoteHide quote news:1164503428.906635.99550@l12g2000cwl.googlegroups.com... > RIght you can compile any source program. You could define another > language if you wanted to :) You need a couple days digging into the > codedom and looking at the samples on the internet. VB.NET makes it > very "easy", after all ... > > Franky ha scritto: > >> I looked at that site and need to study it more but do I understand >> correctly that I could, at run time, actually run a little Basic program >> inputted by the user? >> >> >> Thanks a lot >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... >> > If I understand you correctly, >> > >> > you could: >> > 1. Create functions and/or operator overloads that define your >> > syntax, >> > 2. Let the user provide the code and compile it to memory on the fly, >> > >> > I mean the Activator.CreateInstance stuff and so on >> > (this requires some little familiarity with reflection, CodeDOM, >> > delegates ... ) >> > >> > http://www.thescripts.com/forum/thread348196.html >> > ... >> > >> > Franky ha scritto: >> > >> >> I don't know how to ask this so that someone will not misread it but >> >> here >> >> goes. >> >> >> >> At run time I want to be able to evaluate functions from the Math >> >> library, >> >> but at design time I do not know what functions will be needed. >> >> >> >> I know I can do >> >> >> >> If Userinput = "SINE" Then zz = Sin(whatever) >> >> >> >> but what I want to do is zz= MyMappingToMath(userinput) >> >> >> >> e.g >> >> Suppose the user inputs SINE(30) at run time >> >> Is there some way I can get the value of SINE(30) if I made no >> >> special >> >> provisions for SINE at design time? >> >> >> >> Thanks >> > > Hi Franky ,
I am not clear if you are realizing that Cor and I have been suggesting 2 distinct approaches to your problem (I am not talking about MSScriptControl)... They are different. MSScriptControl may be quicker to implement while the other one has infinite flexibility. The choice is up to you ... tommaso Franky ha scritto: Show quoteHide quote > I'll look into it. I see much to read about it. > > BTW - maybe you know > > Is there any documentation about MSScriptControl.ScriptControlClass > > I can't find out what properties and methods are available. > > Do you know where they are documented. > > > Thanks for telling me about codedom > > > <tommaso.gasta***@uniroma1.it> wrote in message > news:1164503428.906635.99550@l12g2000cwl.googlegroups.com... > > RIght you can compile any source program. You could define another > > language if you wanted to :) You need a couple days digging into the > > codedom and looking at the samples on the internet. VB.NET makes it > > very "easy", after all ... > > > > Franky ha scritto: > > > >> I looked at that site and need to study it more but do I understand > >> correctly that I could, at run time, actually run a little Basic program > >> inputted by the user? > >> > >> > >> Thanks a lot > >> > >> <tommaso.gasta***@uniroma1.it> wrote in message > >> news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... > >> > If I understand you correctly, > >> > > >> > you could: > >> > 1. Create functions and/or operator overloads that define your > >> > syntax, > >> > 2. Let the user provide the code and compile it to memory on the fly, > >> > > >> > I mean the Activator.CreateInstance stuff and so on > >> > (this requires some little familiarity with reflection, CodeDOM, > >> > delegates ... ) > >> > > >> > http://www.thescripts.com/forum/thread348196.html > >> > ... > >> > > >> > Franky ha scritto: > >> > > >> >> I don't know how to ask this so that someone will not misread it but > >> >> here > >> >> goes. > >> >> > >> >> At run time I want to be able to evaluate functions from the Math > >> >> library, > >> >> but at design time I do not know what functions will be needed. > >> >> > >> >> I know I can do > >> >> > >> >> If Userinput = "SINE" Then zz = Sin(whatever) > >> >> > >> >> but what I want to do is zz= MyMappingToMath(userinput) > >> >> > >> >> e.g > >> >> Suppose the user inputs SINE(30) at run time > >> >> Is there some way I can get the value of SINE(30) if I made no > >> >> special > >> >> provisions for SINE at design time? > >> >> > >> >> Thanks > >> > > > Thanks for all the interest and help. I'm pursuing both approaches for two
different uses. I've copied what Cor suggested to use for expression evaluation, and that works on simple expressions - but I can't get Sin(PI/4) to work. I have been unable to find any info on the control so I really can't go any further with that. I plan to use your suggestion for running BASIC-like programs. I've found and copied much from the Internet and need to read it. In the book MS VB.Net Programmers cookbook I found a example that I will use as a starting example. I wish I could find info about the control/class because I believe I could easily finish that project and be done with it. Thanks again <tommaso.gasta***@uniroma1.it> wrote in message Show quoteHide quote news:1164548311.510742.38670@j44g2000cwa.googlegroups.com... > Hi Franky , > > I am not clear if you are realizing that Cor and I have been suggesting > 2 distinct approaches to your problem (I am not talking about > MSScriptControl)... > > They are different. MSScriptControl may be quicker to implement while > the other one has infinite flexibility. The choice is up to you ... > > tommaso > > Franky ha scritto: > >> I'll look into it. I see much to read about it. >> >> BTW - maybe you know >> >> Is there any documentation about MSScriptControl.ScriptControlClass >> >> I can't find out what properties and methods are available. >> >> Do you know where they are documented. >> >> >> Thanks for telling me about codedom >> >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> news:1164503428.906635.99550@l12g2000cwl.googlegroups.com... >> > RIght you can compile any source program. You could define another >> > language if you wanted to :) You need a couple days digging into the >> > codedom and looking at the samples on the internet. VB.NET makes it >> > very "easy", after all ... >> > >> > Franky ha scritto: >> > >> >> I looked at that site and need to study it more but do I understand >> >> correctly that I could, at run time, actually run a little Basic >> >> program >> >> inputted by the user? >> >> >> >> >> >> Thanks a lot >> >> >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> >> news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... >> >> > If I understand you correctly, >> >> > >> >> > you could: >> >> > 1. Create functions and/or operator overloads that define your >> >> > syntax, >> >> > 2. Let the user provide the code and compile it to memory on the >> >> > fly, >> >> > >> >> > I mean the Activator.CreateInstance stuff and so on >> >> > (this requires some little familiarity with reflection, >> >> > CodeDOM, >> >> > delegates ... ) >> >> > >> >> > http://www.thescripts.com/forum/thread348196.html >> >> > ... >> >> > >> >> > Franky ha scritto: >> >> > >> >> >> I don't know how to ask this so that someone will not misread it >> >> >> but >> >> >> here >> >> >> goes. >> >> >> >> >> >> At run time I want to be able to evaluate functions from the Math >> >> >> library, >> >> >> but at design time I do not know what functions will be needed. >> >> >> >> >> >> I know I can do >> >> >> >> >> >> If Userinput = "SINE" Then zz = Sin(whatever) >> >> >> >> >> >> but what I want to do is zz= MyMappingToMath(userinput) >> >> >> >> >> >> e.g >> >> >> Suppose the user inputs SINE(30) at run time >> >> >> Is there some way I can get the value of SINE(30) if I made no >> >> >> special >> >> >> provisions for SINE at design time? >> >> >> >> >> >> Thanks >> >> > >> > > Good! Keep us up to date about your progress :)
see this http://www.codeproject.com/cs/algorithms/matheval.asp (don't let the c# scare you, VB is just the same...) Franky ha scritto: Show quoteHide quote > Thanks for all the interest and help. I'm pursuing both approaches for two > different uses. > > I've copied what Cor suggested to use for expression evaluation, and that > works on simple expressions - but I can't get Sin(PI/4) to work. I have been > unable to find any info on the control so I really can't go any further with > that. > > I plan to use your suggestion for running BASIC-like programs. I've found > and copied much from the Internet and need to read it. In the book MS VB.Net > Programmers cookbook I found a example that I will use as a starting > example. > > I wish I could find info about the control/class because I believe I could > easily finish that project and be done with it. > > > Thanks again > > > <tommaso.gasta***@uniroma1.it> wrote in message > news:1164548311.510742.38670@j44g2000cwa.googlegroups.com... > > Hi Franky , > > > > I am not clear if you are realizing that Cor and I have been suggesting > > 2 distinct approaches to your problem (I am not talking about > > MSScriptControl)... > > > > They are different. MSScriptControl may be quicker to implement while > > the other one has infinite flexibility. The choice is up to you ... > > > > tommaso > > > > Franky ha scritto: > > > >> I'll look into it. I see much to read about it. > >> > >> BTW - maybe you know > >> > >> Is there any documentation about MSScriptControl.ScriptControlClass > >> > >> I can't find out what properties and methods are available. > >> > >> Do you know where they are documented. > >> > >> > >> Thanks for telling me about codedom > >> > >> > >> <tommaso.gasta***@uniroma1.it> wrote in message > >> news:1164503428.906635.99550@l12g2000cwl.googlegroups.com... > >> > RIght you can compile any source program. You could define another > >> > language if you wanted to :) You need a couple days digging into the > >> > codedom and looking at the samples on the internet. VB.NET makes it > >> > very "easy", after all ... > >> > > >> > Franky ha scritto: > >> > > >> >> I looked at that site and need to study it more but do I understand > >> >> correctly that I could, at run time, actually run a little Basic > >> >> program > >> >> inputted by the user? > >> >> > >> >> > >> >> Thanks a lot > >> >> > >> >> <tommaso.gasta***@uniroma1.it> wrote in message > >> >> news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... > >> >> > If I understand you correctly, > >> >> > > >> >> > you could: > >> >> > 1. Create functions and/or operator overloads that define your > >> >> > syntax, > >> >> > 2. Let the user provide the code and compile it to memory on the > >> >> > fly, > >> >> > > >> >> > I mean the Activator.CreateInstance stuff and so on > >> >> > (this requires some little familiarity with reflection, > >> >> > CodeDOM, > >> >> > delegates ... ) > >> >> > > >> >> > http://www.thescripts.com/forum/thread348196.html > >> >> > ... > >> >> > > >> >> > Franky ha scritto: > >> >> > > >> >> >> I don't know how to ask this so that someone will not misread it > >> >> >> but > >> >> >> here > >> >> >> goes. > >> >> >> > >> >> >> At run time I want to be able to evaluate functions from the Math > >> >> >> library, > >> >> >> but at design time I do not know what functions will be needed. > >> >> >> > >> >> >> I know I can do > >> >> >> > >> >> >> If Userinput = "SINE" Then zz = Sin(whatever) > >> >> >> > >> >> >> but what I want to do is zz= MyMappingToMath(userinput) > >> >> >> > >> >> >> e.g > >> >> >> Suppose the user inputs SINE(30) at run time > >> >> >> Is there some way I can get the value of SINE(30) if I made no > >> >> >> special > >> >> >> provisions for SINE at design time? > >> >> >> > >> >> >> Thanks > >> >> > > >> > > > In regard to evaluating an expression, in contrast to compiling/running
Basic. I've read this. Using the .NET framework compilation capabilities seem to be the most obvious way to make an evaluator. However, in practice this technique has a nasty side effect, it looks like it creates a new DLL in memory each time you evaluate your function and it seems nearly impossible to unload the DLL. I'm pretty sure he is referenceing a CodeProvider with GenerateInMemory = true. Do you agree with that there is such a problem now. thanks With regards to compiling and running Basic using a temp file, that appears to be working fine. In fact, as a test, I've copied the complete Designer generated code for my About folder and pasted it in as the Basic program and it woks fine. Thanks for that <tommaso.gasta***@uniroma1.it> wrote in message Show quoteHide quote news:1164553944.941645.126690@j72g2000cwa.googlegroups.com... > Good! Keep us up to date about your progress :) > > see this http://www.codeproject.com/cs/algorithms/matheval.asp > > (don't let the c# scare you, VB is just the same...) > > Franky ha scritto: > >> Thanks for all the interest and help. I'm pursuing both approaches for >> two >> different uses. >> >> I've copied what Cor suggested to use for expression evaluation, and that >> works on simple expressions - but I can't get Sin(PI/4) to work. I have >> been >> unable to find any info on the control so I really can't go any further >> with >> that. >> >> I plan to use your suggestion for running BASIC-like programs. I've found >> and copied much from the Internet and need to read it. In the book MS >> VB.Net >> Programmers cookbook I found a example that I will use as a starting >> example. >> >> I wish I could find info about the control/class because I believe I >> could >> easily finish that project and be done with it. >> >> >> Thanks again >> >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> news:1164548311.510742.38670@j44g2000cwa.googlegroups.com... >> > Hi Franky , >> > >> > I am not clear if you are realizing that Cor and I have been suggesting >> > 2 distinct approaches to your problem (I am not talking about >> > MSScriptControl)... >> > >> > They are different. MSScriptControl may be quicker to implement while >> > the other one has infinite flexibility. The choice is up to you ... >> > >> > tommaso >> > >> > Franky ha scritto: >> > >> >> I'll look into it. I see much to read about it. >> >> >> >> BTW - maybe you know >> >> >> >> Is there any documentation about MSScriptControl.ScriptControlClass >> >> >> >> I can't find out what properties and methods are available. >> >> >> >> Do you know where they are documented. >> >> >> >> >> >> Thanks for telling me about codedom >> >> >> >> >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> >> news:1164503428.906635.99550@l12g2000cwl.googlegroups.com... >> >> > RIght you can compile any source program. You could define another >> >> > language if you wanted to :) You need a couple days digging into >> >> > the >> >> > codedom and looking at the samples on the internet. VB.NET makes it >> >> > very "easy", after all ... >> >> > >> >> > Franky ha scritto: >> >> > >> >> >> I looked at that site and need to study it more but do I understand >> >> >> correctly that I could, at run time, actually run a little Basic >> >> >> program >> >> >> inputted by the user? >> >> >> >> >> >> >> >> >> Thanks a lot >> >> >> >> >> >> <tommaso.gasta***@uniroma1.it> wrote in message >> >> >> news:1164471795.657538.327390@h54g2000cwb.googlegroups.com... >> >> >> > If I understand you correctly, >> >> >> > >> >> >> > you could: >> >> >> > 1. Create functions and/or operator overloads that define your >> >> >> > syntax, >> >> >> > 2. Let the user provide the code and compile it to memory on the >> >> >> > fly, >> >> >> > >> >> >> > I mean the Activator.CreateInstance stuff and so on >> >> >> > (this requires some little familiarity with reflection, >> >> >> > CodeDOM, >> >> >> > delegates ... ) >> >> >> > >> >> >> > http://www.thescripts.com/forum/thread348196.html >> >> >> > ... >> >> >> > >> >> >> > Franky ha scritto: >> >> >> > >> >> >> >> I don't know how to ask this so that someone will not misread it >> >> >> >> but >> >> >> >> here >> >> >> >> goes. >> >> >> >> >> >> >> >> At run time I want to be able to evaluate functions from the >> >> >> >> Math >> >> >> >> library, >> >> >> >> but at design time I do not know what functions will be needed. >> >> >> >> >> >> >> >> I know I can do >> >> >> >> >> >> >> >> If Userinput = "SINE" Then zz = Sin(whatever) >> >> >> >> >> >> >> >> but what I want to do is zz= MyMappingToMath(userinput) >> >> >> >> >> >> >> >> e.g >> >> >> >> Suppose the user inputs SINE(30) at run time >> >> >> >> Is there some way I can get the value of SINE(30) if I made no >> >> >> >> special >> >> >> >> provisions for SINE at design time? >> >> >> >> >> >> >> >> Thanks >> >> >> > >> >> > >> > > Franky ha scritto:
> In regard to evaluating an expression, in contrast to compiling/running Hi Franky ,> Basic. I've read this. > > Using the .NET framework compilation capabilities seem to be the most > obvious way to make an evaluator. However, in practice this technique has a > nasty side effect, it looks like it creates a new DLL in memory each time > you evaluate your function and it seems nearly impossible to unload the DLL. > > I'm pretty sure he is referenceing a CodeProvider with GenerateInMemory = > true. > > Do you agree with that there is such a problem now. > I think this technique it's quite powerful and general. And it's fast. I have never experienced any serious problem, in all occasions I have used it. It takes some time to make a good use of it and to write a friend way to interface with the user, but you have all the possible flexibility... It goes like : Dim VBCodeProvider As New VBCodeProvider Me.CompilerParameters = New CompilerParameters With CompilerParameters .IncludeDebugInformation = False .GenerateInMemory = True .GenerateExecutable = False ... 'Add here various references ... ..ReferencedAssemblies.Add(Reference) ... End With ... CompilerResults = G_MyVBCodeProvider.CompileAssemblyFromSource(Me.CompilerParameters, someCode) ....handle errors ... 'create instance if ok Activator.CreateInstance(TipoClasse) [ sometimes, in general contexts, you may need System.Delegate.CreateDelegate for invocation ] Let me know if you experience particular problems ... Tommaso Found this in the doc
The get accessor for the CompiledAssembly property calls the Load method to load the compiled assembly into the current application domain. After calling the get accessor, the compiled assembly cannot be deleted until the current AppDomain is unloaded. is that the problem referred to in a previous post in this thread? Bottom line, since I do not know what it means (AppDomain is unloaded) I'm asking if this is a problem if a program does repeated calculations? Thanks for all the help - almost everything is working <tommaso.gasta***@uniroma1.it> wrote in message Show quoteHide quote news:1164840457.363251.263080@14g2000cws.googlegroups.com... > > Franky ha scritto: > >> In regard to evaluating an expression, in contrast to compiling/running >> Basic. I've read this. >> >> Using the .NET framework compilation capabilities seem to be the most >> obvious way to make an evaluator. However, in practice this technique has >> a >> nasty side effect, it looks like it creates a new DLL in memory each time >> you evaluate your function and it seems nearly impossible to unload the >> DLL. >> >> I'm pretty sure he is referenceing a CodeProvider with GenerateInMemory >> = >> true. >> >> Do you agree with that there is such a problem now. >> > > Hi Franky , > > I think this technique it's quite powerful and general. And it's fast. > I have never experienced any serious problem, in all occasions > I have used it. It takes some time to make a good use of it > and to write a friend way to interface with the user, but you have > all the possible flexibility... > > It goes like : > > Dim VBCodeProvider As New VBCodeProvider > Me.CompilerParameters = New CompilerParameters > With CompilerParameters > .IncludeDebugInformation = False > .GenerateInMemory = True > .GenerateExecutable = False > ... > > 'Add here various references ... > .ReferencedAssemblies.Add(Reference) ... > End With > ... > > CompilerResults = > G_MyVBCodeProvider.CompileAssemblyFromSource(Me.CompilerParameters, > someCode) > > ....handle errors ... > > > 'create instance if ok > > Activator.CreateInstance(TipoClasse) > > > [ sometimes, in general contexts, you may need > System.Delegate.CreateDelegate for invocation ] > > Let me know if you experience particular problems ... > > Tommaso > hi Franky ,
As to the specific aspect you ask about I have to confess that I have not investigated it, as I was more concerned to make the things works. So actually I do not know what the complete answer to your question. I guess that after you use the instance and then set it to Nothing, probably the Garbage Collector would take care of it. As to programming I never had problems: I could compile *the same class* again and again (with same or different code) in memory any number of times ... I guess that the new class replace the old one, and the old one gets disposed (??). The fact that the last class remains in memory is not a problem, it actualy just what we want... If anyone can provide more details it would be nice to know about the inner working Let me know if you find out anything... Tommaso Franky ha scritto: Show quoteHide quote > Found this in the doc > > The get accessor for the CompiledAssembly property calls the Load method to > load the compiled assembly into the current application domain. After > calling the get accessor, the compiled assembly cannot be deleted until the > current AppDomain is unloaded. > > is that the problem referred to in a previous post in this thread? > > Bottom line, since I do not know what it means (AppDomain is unloaded) I'm > asking if this is a problem if a program does repeated calculations? > > > > Thanks for all the help - almost everything is working > > > > > > <tommaso.gasta***@uniroma1.it> wrote in message > news:1164840457.363251.263080@14g2000cws.googlegroups.com... > > > > Franky ha scritto: > > > >> In regard to evaluating an expression, in contrast to compiling/running > >> Basic. I've read this. > >> > >> Using the .NET framework compilation capabilities seem to be the most > >> obvious way to make an evaluator. However, in practice this technique has > >> a > >> nasty side effect, it looks like it creates a new DLL in memory each time > >> you evaluate your function and it seems nearly impossible to unload the > >> DLL. > >> > >> I'm pretty sure he is referenceing a CodeProvider with GenerateInMemory > >> = > >> true. > >> > >> Do you agree with that there is such a problem now. > >> > > > > Hi Franky , > > > > I think this technique it's quite powerful and general. And it's fast. > > I have never experienced any serious problem, in all occasions > > I have used it. It takes some time to make a good use of it > > and to write a friend way to interface with the user, but you have > > all the possible flexibility... > > > > It goes like : > > > > Dim VBCodeProvider As New VBCodeProvider > > Me.CompilerParameters = New CompilerParameters > > With CompilerParameters > > .IncludeDebugInformation = False > > .GenerateInMemory = True > > .GenerateExecutable = False > > ... > > > > 'Add here various references ... > > .ReferencedAssemblies.Add(Reference) ... > > End With > > ... > > > > CompilerResults = > > G_MyVBCodeProvider.CompileAssemblyFromSource(Me.CompilerParameters, > > someCode) > > > > ....handle errors ... > > > > > > 'create instance if ok > > > > Activator.CreateInstance(TipoClasse) > > > > > > [ sometimes, in general contexts, you may need > > System.Delegate.CreateDelegate for invocation ] > > > > Let me know if you experience particular problems ... > > > > Tommaso > > I copied my code and pu it into the form that opens when the user clicks the
"About" menu item. Took out commments to make it shorter. First time I click About 10 appears in the "Output" pane The second time I get the error See anything wrong? Thanks Private Sub FormAbout_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load Dim VBCodeProvider As New VBCodeProvider Dim Param As New CompilerParameters() With Param ..IncludeDebugInformation = False ..GenerateInMemory = True ..GenerateExecutable = False Dim Asm As System.Reflection.Assembly For Each Asm In AppDomain.CurrentDomain.GetAssemblies() Param.ReferencedAssemblies.Add(Asm.Location) Next End With Dim code As String = "Imports System " & vbCrLf code += "Imports System.Math" & vbCrLf code += "NameSpace Calculate" & vbCrLf code += " Public Class Evaluator" & vbCrLf code += " Public Shared Function Calc() as double" & vbCrLf code += " Return " & "5+5" & vbCrLf code += "End Function" & vbCrLf code += "End Class" & vbCrLf code += "End NameSpace" & vbCrLf Dim Results As CompilerResults = VBCodeProvider.CompileAssemblyFromSource(Param, code) If Results.Errors.Count > 0 Then Dim Err As CompilerError Dim ErrorString As String = "" For Each Err In Results.Errors ErrorString &= vbCrLf & Err.ToString() Next MessageBox.Show(ErrorString, "Compiler Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Else Dim Assem As Assembly = Results.CompiledAssembly Dim Eval As Object = Assem.CreateInstance("Calculate.Evaluator") Dim typeOfEval As Type = Eval.GetType() Dim calcInfo As MethodInfo = typeOfEval.GetMethod("Calc") Console.WriteLine(calcInfo.Invoke(Eval, Nothing).ToString) Assem = Nothing Eval = Nothing typeOfEval = Nothing calcInfo = Nothing End If VBCodeProvider = Nothing Param = Nothing End Sub Guess I didn't mention this in this thread.
The reason I included the code in my last post is: The first time I click "About", to compile and run the sample code it works OK The second time I click "About", to compile and run the same sample code I get the following: vbc : Command line (0,0) : error BC2006: option 'r' requires':<file_list>' Been trying to find out what the command line is when the compiler is run but haven't figured out how yet. Thanks for any helpful suggestions dont think you need
For Each Asm In AppDomain.CurrentDomain.GetAssemblies() .... removing that seems fine. Dim VBCodeProvider As New VBCodeProvider Dim Param As New CodeDom.Compiler.CompilerParameters() With Param .IncludeDebugInformation = False .GenerateInMemory = True .GenerateExecutable = False 'Dim Asm As System.Reflection.Assembly 'For Each Asm In AppDomain.CurrentDomain.GetAssemblies() ' Param.ReferencedAssemblies.Add(Asm.Location) 'Next End With Franky ha scritto: Show quoteHide quote > I copied my code and pu it into the form that opens when the user clicks the > "About" menu item. > Took out commments to make it shorter. > First time I click About 10 appears in the "Output" pane > The second time I get the error > See anything wrong? > > Thanks > > Private Sub FormAbout_Load(ByVal sender As Object, ByVal e As EventArgs) > Handles MyBase.Load > Dim VBCodeProvider As New VBCodeProvider > Dim Param As New CompilerParameters() > With Param > .IncludeDebugInformation = False > .GenerateInMemory = True > .GenerateExecutable = False > Dim Asm As System.Reflection.Assembly > For Each Asm In AppDomain.CurrentDomain.GetAssemblies() > Param.ReferencedAssemblies.Add(Asm.Location) > Next > End With > Dim code As String = "Imports System " & vbCrLf > code += "Imports System.Math" & vbCrLf > code += "NameSpace Calculate" & vbCrLf > code += " Public Class Evaluator" & vbCrLf > code += " Public Shared Function Calc() as double" & vbCrLf > code += " Return " & "5+5" & vbCrLf > code += "End Function" & vbCrLf > code += "End Class" & vbCrLf > code += "End NameSpace" & vbCrLf > Dim Results As CompilerResults = > VBCodeProvider.CompileAssemblyFromSource(Param, code) > If Results.Errors.Count > 0 Then > Dim Err As CompilerError > Dim ErrorString As String = "" > For Each Err In Results.Errors > ErrorString &= vbCrLf & Err.ToString() > Next > MessageBox.Show(ErrorString, "Compiler Error", MessageBoxButtons.OK, > MessageBoxIcon.Error) > Else > Dim Assem As Assembly = Results.CompiledAssembly > Dim Eval As Object = Assem.CreateInstance("Calculate.Evaluator") > Dim typeOfEval As Type = Eval.GetType() > Dim calcInfo As MethodInfo = typeOfEval.GetMethod("Calc") > Console.WriteLine(calcInfo.Invoke(Eval, Nothing).ToString) > Assem = Nothing > Eval = Nothing > typeOfEval = Nothing > calcInfo = Nothing > End If > VBCodeProvider = Nothing > Param = Nothing > End Sub Ok that did it
I included that earlier because I wanted Math and did not know how to reference it in Param.ReferencedAssemblies.Add(????) So I thougt I'd grab them all and fix it later. Thanks Franky,
In fact not, but you can use scripting (VBS) I thought that those functions where in those. http://www.vb-tips.com/dbpages.aspx?ID=34241f3e-16ff-4e87-86d1-2b03e1a439ae I hope this gives some idea/s Cor Show quoteHide quote " Franky" <frankyNOSPAM@a-znet.com> schreef in bericht news:OZ$cVvKEHHA.1012@TK2MSFTNGP04.phx.gbl... >I don't know how to ask this so that someone will not misread it but here >goes. > > At run time I want to be able to evaluate functions from the Math > library, but at design time I do not know what functions will be needed. > > I know I can do > > If Userinput = "SINE" Then zz = Sin(whatever) > > but what I want to do is zz= MyMappingToMath(userinput) > > e.g > Suppose the user inputs SINE(30) at run time > Is there some way I can get the value of SINE(30) if I made no special > provisions for SINE at design time? > > Thanks > Thanks, I used that but now I'm wondering if I can actually interpret a
small Basic program Thanks, just what I needed Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:uJFa2NLEHHA.4808@TK2MSFTNGP03.phx.gbl... > Franky, > > In fact not, but you can use scripting (VBS) I thought that those > functions where in those. > > http://www.vb-tips.com/dbpages.aspx?ID=34241f3e-16ff-4e87-86d1-2b03e1a439ae > > > I hope this gives some idea/s > > Cor > > " Franky" <frankyNOSPAM@a-znet.com> schreef in bericht > news:OZ$cVvKEHHA.1012@TK2MSFTNGP04.phx.gbl... >>I don't know how to ask this so that someone will not misread it but here >>goes. >> >> At run time I want to be able to evaluate functions from the Math >> library, but at design time I do not know what functions will be needed. >> >> I know I can do >> >> If Userinput = "SINE" Then zz = Sin(whatever) >> >> but what I want to do is zz= MyMappingToMath(userinput) >> >> e.g >> Suppose the user inputs SINE(30) at run time >> Is there some way I can get the value of SINE(30) if I made no special >> provisions for SINE at design time? >> >> Thanks >> > > I'm looking for so doc on MSScriptControl.ScriptControlClass but do not see
it in Help. How do I learn what the properties and methods are? Thanks again Show quoteHide quote " Franky" <frankyNOSPAM@a-znet.com> wrote in message news:enQu48LEHHA.4132@TK2MSFTNGP04.phx.gbl... > Thanks, I used that but now I'm wondering if I can actually interpret a > small Basic program > > > Thanks, just what I needed > > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message > news:uJFa2NLEHHA.4808@TK2MSFTNGP03.phx.gbl... >> Franky, >> >> In fact not, but you can use scripting (VBS) I thought that those >> functions where in those. >> >> http://www.vb-tips.com/dbpages.aspx?ID=34241f3e-16ff-4e87-86d1-2b03e1a439ae >> >> >> I hope this gives some idea/s >> >> Cor >> >> " Franky" <frankyNOSPAM@a-znet.com> schreef in bericht >> news:OZ$cVvKEHHA.1012@TK2MSFTNGP04.phx.gbl... >>>I don't know how to ask this so that someone will not misread it but here >>>goes. >>> >>> At run time I want to be able to evaluate functions from the Math >>> library, but at design time I do not know what functions will be needed. >>> >>> I know I can do >>> >>> If Userinput = "SINE" Then zz = Sin(whatever) >>> >>> but what I want to do is zz= MyMappingToMath(userinput) >>> >>> e.g >>> Suppose the user inputs SINE(30) at run time >>> Is there some way I can get the value of SINE(30) if I made no special >>> provisions for SINE at design time? >>> >>> Thanks >>> >> >> > > 
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