Have you seen https://ncalc.codeplex.com/ and https://github.com/sheetsync/NCalc ? It’s extensible, fast (e.g. has its own cache) enables you to provide custom functions and varaibles at run time by handling EvaluateFunction/EvaluateParameter events. Example expressions it can parse: Expression e = new Expression(“Round(Pow(Pi, 2) + Pow([Pi2], 2) + X, 2)”); e.Parameters[“Pi2”] = new Expression(“Pi * Pi”); e.Parameters[“X”] = … Read more
You cannot use Visual Studio 2008 to develop 4.0 applications in a supported manner. Currently only Visual Studio 2010 can be used to develop 4.0 apps. Starting with 2008 you can use it to develop for earlier versions of the framework but not later ones.
I had this problem also and it was a pain. I configured my connection string and managed to solve the problem. In the connection string I replaced the value |DataDirectory|\dbfilename.mdf for AttachDbFilename property, with the path to the file. |DataDirectory| can only be used if the database file is in the App_Data folder inside same … Read more
Preferentially, avoid having long tasks executing in such an environment. Delegate long running tasks out to a stable system service via interoperability, leaving the web application responsive and only required for direct user requests. Web applications have never been (and still aren’t) considered reliable systems – anyone who has ever used a browser has encountered … Read more
Found solution on the error page itself. Just needed to add requestValidationMode=”2.0″ in web.config <system.web> <compilation debug=”true” targetFramework=”4.0″ /> <httpRuntime requestValidationMode=”2.0″ /> </system.web> MSDN information: HttpRuntimeSection.RequestValidationMode Property
When you get this error it isn’t always obvious what is going on, but as the error says – you are missing a reference. Take the following line of code as an example: MyObjectType a = new MyObjectType(“parameter”); It looks simple enough and you probably have referenced “MyObjectType” correctly. But lets say one of the … Read more