C# & Other .NET Compilers


Adding uCalc Fast Math Parser to your .NET application


Previous versions had a separate way of implementing uCalc with .NET.As of version 3.0 you simply add the include file to your project, and make sure the DLLs are in the path (no need to use Add Reference), and youíre ready to go.In C#, instead things like uCalcNET.uCalcNET.ucReleaseItem itís now uCalc.ucReleaseItem.There is no longer an additional uCalcNET.dll file.


Note: Version 3 was designed to work with C# 2010 and C# 2012.For earlier versions of C#, you may either revise the uCalc header, or else use uCalc FMP 2.96.Also, C# examples in this documentation were originally intended for earlier versions of C#.The examples were manually revised but not tested.Sample code that was tested with C# 2010 and C# 2012 can be found in the demo program that comes with the uCalc FMP download.



Example 1:


In C# (unlike VB.NET), you have the option of declaring a section of code as unsafe, so that you can use pointers.This allows you to attach a uCalc variable to the address of a variable in your host C# program.For VB.NET, you would need to use ucSetVariableValue, which is commented out in the code below:



unsafe private void buttonSpeedTest_Click(object sender, System.EventArgs e)


††††† int ExprHandle, xHandle;

††††† double x = 1, SumTotal = 0, SumMax, TimerStart, TimerEnd;


††††† // Un-comment the following line if you prefer not to use the C# "unsafe" mode

††††† // xHandle = uCalc.ucDefineVariable("x As Double");


††††† // Remove the following line if you prefer not to use the C# "unsafe" mode

††††† xHandle = uCalc.ucDefineVariable("x As Double", (int)&x);


††††† ExprHandle = uCalc.ucParse(textSumExpression.Text);

††††† SumMax = System.Convert.ToDouble(textSumMax.Text);†††††††††††††††


††††† TimerStart = Microsoft.VisualBasic.DateAndTime.Timer;

††††† while (x <= SumMax)

††††† {

††††††††††† // Un-comment the following line if you prefer not to use the C# "unsafe" mode

††††††††††† // uCalc.ucSetVariableValue(xHandle, x);

††††††††††† SumTotal = SumTotal + uCalc.ucEvaluate(ExprHandle);

††††††††††† x++;

††††† }

††††† TimerEnd = Microsoft.VisualBasic.DateAndTime.Timer - TimerStart;


††††† textSumResult.Text = System.Convert.ToString(SumTotal);

††††† labelElapsedTime.Text = "Elapsed Time:" + System.Convert.ToString(TimerEnd);


††††† uCalc.ucReleaseItem(ExprHandle);

††††† uCalc.ucReleaseItem(xHandle);††††††







Other C# Examples:


The following examples are for key features that may have some peculiarities in C#.There are many more examples in Visual Basic that are general enough that a C# counter-part was not included.


Example 3:Simple evaluation with ucEvalStr

Example 4:Fast evaluation millions of times in a loop

Example 5:Defining a centralized error handler

Example 6:Raising an error with ucRaiseErrorMessage

Example 7:A native function callback with two numeric arguments

Example 8:A native function callback with any number of arguments

Example 9:A native string callback function

Example 10:Attached variables


See More Examples


New or enhanced in version 3.0

         See also Whatís New.


New or enhanced in version 2.96