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dotnet jscript : Adding JScript Eval to an ASPX Parser
I am trying to add a JScript Evaluation to a Page Template parser in C# for a CMS port from ASP that I am doing. VBscript (for ASP) has an Eval function which we have used to allow some measure of scripting within page templates (allowing some of our other developers to extend our pages without playing with the base scripts). The Evaluation works in C# for actual JScript.Net classes (like Math, etc) but I am having problems loading (or referencing) Net Managed assemblies (like System, or classes which we have created) into the script engine. The somewhat prototypical code I am using for this is (in a Parse.dll assembly which the aspx page 'uses'): <code> Microsoft.JScript.Vsa.VsaEngine scriptEngine = Microsoft.JScript.Vsa.VsaEngine.CreateEngine(); try{ // Ok, now evaluate the expression using the script file where necessary. result = Microsoft.JScript.Eval.JScriptEvaluate(fullscriptfile, scriptEngine).ToString(); }catch(Exception ex){ result = ex.ToString(); } return result; </code> where the script file is loaded into the string 'fullscriptfile'. Is there any way I can add C# assemblies into the scriptEngine before Evaluating. I tried the Microsoft.JScript.Import(name, Engine) method but I cant find any information on what string it requires for the 'name' parameter...is it the assembly name, path to the dll or something else (I have tried both these options without success)? Could it be a security issue? Hoping someone can help as there is not a lot on the Net or MSDN about this. Mark
the vsa engine has an Items (IVsaItems) collections, to which you can add
references. -- bruce (sqlwork.com) [quoted text, click to view] "Kolo San" <write2kolo@hotmail.com> wrote in message | Hi,news:ShWpd.7690$3U4.233365@news02.tsnz.net... | | I am trying to add a JScript Evaluation to a Page Template parser in C# for | a CMS port from ASP that I am doing. VBscript (for ASP) has an Eval | function which we have used to allow some measure of scripting within page | templates (allowing some of our other developers to extend our pages without | playing with the base scripts). | | The Evaluation works in C# for actual JScript.Net classes (like Math, etc) | but I am having problems loading (or referencing) Net Managed assemblies | (like System, or classes which we have created) into the script engine. | | The somewhat prototypical code I am using for this is (in a Parse.dll | assembly which the aspx page 'uses'): | | <code> | | Microsoft.JScript.Vsa.VsaEngine scriptEngine = | Microsoft.JScript.Vsa.VsaEngine.CreateEngine(); | try{ | // Ok, now evaluate the expression using the script file where necessary. | result = Microsoft.JScript.Eval.JScriptEvaluate(fullscriptfile, | scriptEngine).ToString(); | }catch(Exception ex){ | result = ex.ToString(); | } | return result; | | </code> | | where the script file is loaded into the string 'fullscriptfile'. | | Is there any way I can add C# assemblies into the scriptEngine before | Evaluating. | | I tried the Microsoft.JScript.Import(name, Engine) method but I cant find | any information on what string it requires for the 'name' parameter...is it | the assembly name, path to the dll or something else (I have tried both | these options without success)? Could it be a security issue? | | Hoping someone can help as there is not a lot on the Net or MSDN about this. | | Mark | |
This is what I have been doing:
string[] commonNamespaces = { "System", "System.Collections", "System.ComponentModel", "System.Data", "System.Drawing", "System.Windows.Forms", "System.Xml", "Ico.Gwx" //"System.Drawing.Drawing2D", //"System.Drawing.Imaging", //"System.Globalization", //"System.IO", //"System.Reflection", //"System.Text", //"System.Text.RegularExpressions", //"System.Threading" }; string[] commonAssemblies = { "mscorlib", "System", "System.Data", "System.Drawing", "System.Windows.Forms", "System.Xml", "GwxRuntimeCore", "GwxRuntimeCoreCommands", "GwxRuntimeViewControl", "GwxConfigCore" }; private Microsoft.JScript.GlobalScope jscriptGlobalScope = null; private void UninitializeJScriptDotNetEngine() { if (jscriptGlobalScope != null) jscriptGlobalScope.engine.Close(); jscriptGlobalScope = null; } private void InitializeJScriptDotNetEngine() { if (jscriptGlobalScope == null) { try { jscriptGlobalScope = Microsoft.JScript.Vsa.VsaEngine.CreateEngineAndGetGlobalScope(false, commonAssemblies); } catch {} foreach (string ns in commonNamespaces) { try { if ((ns != null) && (ns != String.Empty)) Microsoft.JScript.Import.JScriptImport(ns, jscriptGlobalScope.engine); } catch {} } } } After initializing the engine you can call Object retVal=Microsoft.JScript.Eval.JScriptEvaluate(jscriptCode, "unsafe", jscriptGlobalScope.engine); it will evaluate your code using the assembly and namespaces that you declared [quoted text, click to view] "bruce barker" <nospam_brubar@safeco.com> wrote in message news:OuFTbaj1EHA.1144@TK2MSFTNGP09.phx.gbl... > the vsa engine has an Items (IVsaItems) collections, to which you can add > references. > > -- bruce (sqlwork.com) > > > "Kolo San" <write2kolo@hotmail.com> wrote in message > news:ShWpd.7690$3U4.233365@news02.tsnz.net... > | Hi, > | > | I am trying to add a JScript Evaluation to a Page Template parser in C# > for > | a CMS port from ASP that I am doing. VBscript (for ASP) has an Eval > | function which we have used to allow some measure of scripting within page > | templates (allowing some of our other developers to extend our pages > without > | playing with the base scripts). > | > | The Evaluation works in C# for actual JScript.Net classes (like Math, etc) > | but I am having problems loading (or referencing) Net Managed assemblies > | (like System, or classes which we have created) into the script engine. > | > | The somewhat prototypical code I am using for this is (in a Parse.dll > | assembly which the aspx page 'uses'): > | > | <code> > | > | Microsoft.JScript.Vsa.VsaEngine scriptEngine = > | Microsoft.JScript.Vsa.VsaEngine.CreateEngine(); > | try{ > | // Ok, now evaluate the expression using the script file where necessary. > | result = Microsoft.JScript.Eval.JScriptEvaluate(fullscriptfile, > | scriptEngine).ToString(); > | }catch(Exception ex){ > | result = ex.ToString(); > | } > | return result; > | > | </code> > | > | where the script file is loaded into the string 'fullscriptfile'. > | > | Is there any way I can add C# assemblies into the scriptEngine before > | Evaluating. > | > | I tried the Microsoft.JScript.Import(name, Engine) method but I cant find > | any information on what string it requires for the 'name' parameter...is > it > | the assembly name, path to the dll or something else (I have tried both > | these options without success)? Could it be a security issue? > | > | Hoping someone can help as there is not a lot on the Net or MSDN about > this. > | > | Mark > | > | > >
Thanks Simone...I will try this out.
Mark [quoted text, click to view] "Simone Massaro" <simone@iconics.com> wrote in message news:uUkTtoI2EHA.304@TK2MSFTNGP11.phx.gbl... > This is what I have been doing: > > string[] commonNamespaces = > > { > > "System", > > "System.Collections", > > "System.ComponentModel", > > "System.Data", > > "System.Drawing", > > "System.Windows.Forms", > > "System.Xml", > > "Ico.Gwx" > > //"System.Drawing.Drawing2D", > > //"System.Drawing.Imaging", > > //"System.Globalization", > > //"System.IO", > > //"System.Reflection", > > //"System.Text", > > //"System.Text.RegularExpressions", > > //"System.Threading" > > }; > > string[] commonAssemblies = > > { > > "mscorlib", > > "System", > > "System.Data", > > "System.Drawing", > > "System.Windows.Forms", > > "System.Xml", > > "GwxRuntimeCore", > > "GwxRuntimeCoreCommands", > > "GwxRuntimeViewControl", > > "GwxConfigCore" > > }; > > private Microsoft.JScript.GlobalScope jscriptGlobalScope = null; > > private void UninitializeJScriptDotNetEngine() > > { > > if (jscriptGlobalScope != null) > > jscriptGlobalScope.engine.Close(); > > jscriptGlobalScope = null; > > } > > private void InitializeJScriptDotNetEngine() > > { > > if (jscriptGlobalScope == null) > > { > > try > > { > > jscriptGlobalScope = > Microsoft.JScript.Vsa.VsaEngine.CreateEngineAndGetGlobalScope(false, > commonAssemblies); > > } > > catch {} > > foreach (string ns in commonNamespaces) > > { > > try > > { > > if ((ns != null) && (ns != String.Empty)) > > Microsoft.JScript.Import.JScriptImport(ns, jscriptGlobalScope.engine); > > } > > catch {} > > } > > } > > } > > > > > After initializing the engine you can call > > Object retVal=Microsoft.JScript.Eval.JScriptEvaluate(jscriptCode, "unsafe", > jscriptGlobalScope.engine); > > it will evaluate your code using the assembly and namespaces that you > declared > > > > "bruce barker" <nospam_brubar@safeco.com> wrote in message > news:OuFTbaj1EHA.1144@TK2MSFTNGP09.phx.gbl... > > the vsa engine has an Items (IVsaItems) collections, to which you can add > > references. > > > > -- bruce (sqlwork.com) > > > > > > "Kolo San" <write2kolo@hotmail.com> wrote in message > > news:ShWpd.7690$3U4.233365@news02.tsnz.net... > > | Hi, > > | > > | I am trying to add a JScript Evaluation to a Page Template parser in C# > > for > > | a CMS port from ASP that I am doing. VBscript (for ASP) has an Eval > > | function which we have used to allow some measure of scripting within > page > > | templates (allowing some of our other developers to extend our pages > > without > > | playing with the base scripts). > > | > > | The Evaluation works in C# for actual JScript.Net classes (like Math, > etc) > > | but I am having problems loading (or referencing) Net Managed assemblies > > | (like System, or classes which we have created) into the script engine. > > | > > | The somewhat prototypical code I am using for this is (in a Parse.dll > > | assembly which the aspx page 'uses'): > > | > > | <code> > > | > > | Microsoft.JScript.Vsa.VsaEngine scriptEngine = > > | Microsoft.JScript.Vsa.VsaEngine.CreateEngine(); > > | try{ > > | // Ok, now evaluate the expression using the script file where > necessary. > > | result = Microsoft.JScript.Eval.JScriptEvaluate(fullscriptfile, > > | scriptEngine).ToString(); > > | }catch(Exception ex){ > > | result = ex.ToString(); > > | } > > | return result; > > | > > | </code> > > | > > | where the script file is loaded into the string 'fullscriptfile'. > > | > > | Is there any way I can add C# assemblies into the scriptEngine before > > | Evaluating. > > | > > | I tried the Microsoft.JScript.Import(name, Engine) method but I cant > find > > | any information on what string it requires for the 'name' parameter...is > > it > > | the assembly name, path to the dll or something else (I have tried both > > | these options without success)? Could it be a security issue? > > | > > | Hoping someone can help as there is not a lot on the Net or MSDN about > > this. > > | > > | Mark > > | > > | > > > > > >
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