ExpressionEvaluation.Runtime 1.3.0

.NET 6.0

dotnet add package ExpressionEvaluation.Runtime --version 1.3.0

NuGet\Install-Package ExpressionEvaluation.Runtime -Version 1.3.0

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="ExpressionEvaluation.Runtime" Version="1.3.0" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

paket add ExpressionEvaluation.Runtime --version 1.3.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: ExpressionEvaluation.Runtime, 1.3.0"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

// Install ExpressionEvaluation.Runtime as a Cake Addin
#addin nuget:?package=ExpressionEvaluation.Runtime&version=1.3.0

// Install ExpressionEvaluation.Runtime as a Cake Tool
#tool nuget:?package=ExpressionEvaluation.Runtime&version=1.3.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

About ExpressionEvaluationRuntime

ExpressionEvaluationRuntime is a mathematical expressions evaluator library written in C# derived from the MathEval project. Allows to evaluate mathematical, boolean, string and datetime expressions. Code is written in pure C#, run on the fly. We don't use any third party libraries or packages. If you get any bugs please let me know by creating a new issue.

Many thanks to our contributors: Thanhrin (from Da Nang, VietNam) Eduardo Salinas (from Huesca, Spain) MathEval (from Matheval)

Installation

Using Package Manager

PM> Install-Package ExpressionEvaluationRuntime

Official document

The libary supports all what is supported in the origibal MathEval library documented here: https://matheval.org/math-expression-eval-for-c-sharp/

Supported operators, contants, functions

Supported Operators

<table>

<tbody>

<tr>

<th>Operator</th>

<th>Description</th>

</tr>

<tr>

<td>Additive operator / Unary plus / Concatenate string / Datetime addition</td>

</tr>

<tr>

<td>Concatenate string</td>

</tr>

<tr>

<td>Subtraction operator / Unary minus / Datetime subtraction</td>

</tr>

<tr>

<td>Multiplication operator, can be omitted in front of an open bracket</td>

</tr>

<tr>

<td>Division operator</td>

</tr>

<tr>

<td>Remainder operator (Modulo)</td>

</tr>

<tr>

<td>Power operator</td>

</tr>

</tbody>

</table>

Supported conditional statements

<table>

<tbody>

<tr>

<th>Conditional statement</th>

<th>Description</th>

</tr>

<tr>

<td>IF(logical_condition, value_if_true, value_if_false)</td>

<td>Example:
IF(2>1,"Pass","Fail")</td>

</tr>

<tr>

<td>SWITCH(expression, val1,result1, [val2,result2], …, [default])</td>

<td>Example:
SWITCH(3+2,5,"Apple",7,"Mango",3,"Good","N/A")</td>

</tr>

</tbody>

</table>

Supported logical and math functions

<table>

<tbody>

<tr>

<th>Function<sup>*</sup></th>

<th>Description</th>

</tr>

<tr>

<td>AND(logical1, [logical2], …)</td>

<td>Determine if all conditions are TRUE</td>

</tr>

<tr>

<td>OR(logical1, [logical2], …)</td>

<td>Determine if any conditions in a test are TRUE</td>

</tr>

<tr>

<td>NOT(logical)</td>

<td>To confirm one value is not equal to another</td>

</tr>

<tr>

<td>XOR(logical1, [logical2], …)</td>

<td>Exclusive OR function</td>

</tr>

<tr>

<td>SUM(number1, [number2],…)</td>

<td>Return sum of numbers supplied</td>

</tr>

<tr>

<td>AVERAGE(number1, [number2],…)</td>

<td>Return average of numbers supplied</td>

</tr>

<tr>

<td>MIN(number1, [number2],…)</td>

<td>Return the smallest value from the numbers supplied</td>

</tr>

<tr>

<td>MAX(number1, [number2],…)</td>

<td>Return the biggest value from the numbers supplied</td>

</tr>

<tr>

<td>MOD(number, divisor)</td>

<td>Get remainder of two given numbers after division operator.</td>

</tr>

<tr>

<td>ROUND(number, num_digits)</td>

<td>Returns the rounded approximation of given number using half-even rounding mode
( you can change to another rounding mode)</td>

</tr>

<tr>

<td>FLOOR(number, significance)</td>

<td>Rounds a given number towards zero to the nearest multiple of a specified significance</td>

</tr>

<tr>

<td>CEILING(number, significance)</td>

<td>Rounds a given number away from zero, to the nearest multiple of a given number</td>

</tr>

<tr>

<td>POWER(number, power)</td>

<td>Returns the result of a number raised to a given power</td>

</tr>

<tr>

<td>Produces a random number between 0 and 1</td>

</tr>

<tr>

<td>SIN(number)</td>

<td>Returns the trigonometric sine of the angle given in radians</td>

</tr>

<tr>

<td>SINH(number)</td>

<td>Returns the hyperbolic sine of a number</td>

</tr>

<tr>

<td>ASIN(number)</td>

<td>Returns the arc sine of an angle, in the range of -pi/2 through pi/2</td>

</tr>

<tr>

<td>COS(number)</td>

<td>Returns the trigonometric cos of the angle given in radians</td>

</tr>

<tr>

<td>COSH(number)</td>

<td>Returns the hyperbolic cos of a number</td>

</tr>

<tr>

<td>ACOS(number)</td>

<td>Returns the arc cosine of an angle, in the range of 0.0 through pi</td>

</tr>

<tr>

<td>TAN(number)</td>

<td>Returns the tangent of the angle given in radians</td>

</tr>

<tr>

<td>TANH(number)</td>

<td>Returns the hyperbolic tangent of a number</td>

</tr>

<tr>

<td>ATAN(number)</td>

<td>Returns the arc tangent of an angle given in radians</td>

</tr>

<tr>

<td>ATAN2(x_number, y_number)</td>

<td>Returns the arctangent from x- and y-coordinates</td>

</tr>

<tr>

<td>COT(number)</td>

<td>Returns the cotangent of an angle given in radians.</td>

</tr>

<tr>

<td>COTH(number)</td>

<td>Returns the hyperbolic cotangent of a number</td>

</tr>

<tr>

<td>SQRT(number)</td>

<td>Returns the correctly rounded positive square root of given number</td>

</tr>

<tr>

<td>LN(number)</td>

<td>Returns the natural logarithm (base e) of given number</td>

</tr>

<tr>

<td>LOG10(number)</td>

<td>Returns the logarithm (base 10) of given number</td>

</tr>

<tr>

<td>EXP(number)</td>

<td>Returns e raised to the power of given number</td>

</tr>

<tr>

<td>ABS(number)</td>

<td>Returns the absolute value of given number</td>

</tr>

<tr>

<td>FACT(number)</td>

<td>Returns the factorial of a given number</td>

</tr>

<tr>

<td>SEC(number)</td>

<td>Returns the secant of an angle given in radians</td>

</tr>

<tr>

<td>CSC(number)</td>

<td>Returns the cosecant of an angle given in radians</td>

</tr>

<tr>

<td>Return value of Pi</td>

</tr>

<tr>

<td>RADIANS(degrees)</td>

<td>Convert degrees to radians</td>

</tr>

<tr>

<td>DEGREES(radians)</td>

<td>Convert radians to degrees</td>

</tr>

<tr>

<td>INT(number)</td>

<td>Returns the Integer value of given number</td>

</tr>

</tbody>

</table>

Supported Constants

<table>

<tbody>

<tr>

<th>Constant</th>

<th>Description</th>

</tr>

<tr>

<td>The value of e</td>

</tr>

<tr>

<td>The value of PI</td>

</tr>

<tr>

<td>The boolean true value</td>

</tr>

<tr>

<td>FALSE</td>

<td>The boolean false value</td>

</tr>

<tr>

<td>The null value</td>

</tr>

</tbody>

</table>

Supported text functions

<table>

<tbody>

<tr>

<th>Function</th>

<th>Description</th>

</tr>

<tr>

<td>LEFT(text, num_chars)</td>

<td>Extracts a given number of characters from the left side of a supplied text string</td>

</tr>

<tr>

<td>RIGHT(text, num_chars)</td>

<td>Extracts a given number of characters from the right side of a supplied text string</td>

</tr>

<tr>

<td>MID(text, start_num, num_chars)</td>

<td>Extracts a given number of characters from the middle of a supplied text string</td>

</tr>

<tr>

<td>REVERSE(text)</td>

<td>Reverse a string</td>

</tr>

<tr>

<td>ISNUMBER(text)</td>

<td>Check if a value is a number</td>

</tr>

<tr>

<td>LOWER(text)</td>

<td>Converts all letters in the specified string to lowercase</td>

</tr>

<tr>

<td>UPPER(text)</td>

<td>Converts all letters in the specified string to uppercase</td>

</tr>

<tr>

<td>PROPER(text)</td>

<td>Capitalizes words given text string</td>

</tr>

<tr>

<td>Removes extra spaces from text</td>

</tr>

<tr>

<td>Returns the length of a string/ text</td>

</tr>

<tr>

<td>TEXT(value, [format_text])</td>

<td>Convert a numeric value into a text string. You can use the TEXT function to embed formatted numbers inside text
Example:
`

TEXT(123) -> 123

TEXT(DATEVALUE("2021-01-23"),"dd-MM-yyyy") -> 23-01-2021

TEXT(2.61,"hh:mm") -> 14:38

TEXT(2.61,"[hh]") -> 62

TEXT(2.61,"hh-mm-ss") -> 14-38-24

<div class="enlighter-default enlighter-v-inline enlighter-t-enlighter "><span class="enlighter"><span class="enlighter-m0">TEXT</span><span class="enlighter-g1">(</span><span class="enlighter-m0">DATEVALUE</span><span class="enlighter-g1">(</span><span class="enlighter-s0">"2021-01-03"</span><span class="enlighter-g1">)</span><span class="enlighter-text">-</span><span class="enlighter-m0">DATEVALUE</span><span class="enlighter-g1">(</span><span class="enlighter-s0">"2021-01-01"</span><span class="enlighter-g1">)</span><span class="enlighter-text">,</span><span class="enlighter-s0">"[h]"</span><span class="enlighter-g1">)</span> <span class="enlighter-text">-</span><span class="enlighter-g1">></span> <span class="enlighter-text"></span> <span class="enlighter-n1">48</span></span></div>

TEXT(DATEVALUE("2021-01-03")-DATEVALUE("2021-01-01"),"[h]") -> 48

<div class="enlighter-default enlighter-v-inline enlighter-t-enlighter "><span class="enlighter"><span class="enlighter-m0">TEXT</span><span class="enlighter-g1">(</span><span class="enlighter-m0">TIME</span><span class="enlighter-g1">(</span><span class="enlighter-n1">12</span><span class="enlighter-text">,</span><span class="enlighter-n4">00</span><span class="enlighter-text">,</span><span class="enlighter-n4">00</span><span class="enlighter-g1">)</span><span class="enlighter-text">-</span><span class="enlighter-m0">TIME</span><span class="enlighter-g1">(</span><span class="enlighter-n1">10</span><span class="enlighter-text">,</span><span class="enlighter-n1">30</span><span class="enlighter-text">,</span><span class="enlighter-n1">10</span><span class="enlighter-g1">)</span><span class="enlighter-text">,</span><span class="enlighter-s0">"hh hours and mm minutes and ss seconds"</span><span class="enlighter-g1">)</span> <span class="enlighter-text">-</span><span class="enlighter-g1">></span> <span class="enlighter-text"></span> <span class="enlighter-s0">"01 hours and 29 minutes and 50 seconds"</span></span></div>

`TEXT(TIME(12,00,00)-TIME(10,30,10),"hh hours and mm minutes and ss seconds") → "01 hours and 29 minutes and 50 seconds"``</td>

</tr>

<tr>

<td>REPLACE(old_text, start_num, num_chars, new_text)</td>

<td>Replaces characters specified by location in a given text string with another text string</td>

</tr>

<tr>

<td>SUBSTITUTE(text, old_text, new_text)</td>

<td>Replaces a set of characters with another</td>

</tr>

<tr>

<td>FIND(find_text, within_text, [start_num])</td>

<td>Returns the location of a substring in a string (case sensitive)</td>

</tr>

<tr>

<td>SEARCH(find_text, within_text, [start_num])</td>

<td>Returns the location of a substring in a string (case insensitive)</td>

</tr>

<tr>

<td>CONCAT(text1, text2, text3,…)</td>

<td>Combines the text from multiple strings</td>

</tr>

<tr>

<td>ISBLANK(text)</td>

<td>Returns TRUE when a given string is null or empty, otherwise return FALSE</td>

</tr>

<tr>

<td>REPT(text, repeat_time)</td>

<td>Repeats characters a given number of times</td>

</tr>

<tr>

<td>Return character from ascii code</td>

</tr>

<tr>

<td>Returns a ascii code of a character</td>

</tr>

<tr>

<td>VALUE(text)</td>

<td>Convert numbers stored as text to numbers</td>

</tr>

</tbody>

</table>

Usage examples

Basic evaluator

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expression = new Expression("(a + b) / 2 ");
		expression.Bind("a", 3);
		expression.Bind("b",5);
		Object value = expression.Eval();
		Console.WriteLine("Result: "+value); //Result: 4
		
	}
}

Conditional statements

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expression = new Expression("IF(time>8, (HOUR_SALARY*8) + (HOUR_SALARY*1.25*(time-8)), HOUR_SALARY*time)");
		//bind variable
		expression.Bind("HOUR_SALARY", 10);
		expression.Bind("time", 9);
		//eval
		Decimal salary = expression.Eval<Decimal>();	
		Console.WriteLine(salary); //return 92.5
	}
}

Validate expression

Expression expression = new Expression("SUM(1,2,3) + true");
List<String> errors = expression.GetError(); 
if(errors.Count > 0)
{
  foreach(String error in errors)
  {
  	Console.WriteLine(error);
  }
}

Min, max, sum, avg

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expr = new Expression("MIN(2,3,16)");
		int min = expr.Eval<int>(); 
		Console.WriteLine(min);// return 2 (min)
		
		expr.SetFomular("Max(2,3,16)");
		int max = expr.Eval<int>(); 
		Console.WriteLine(max);// return 16 (max)
		
		expr.SetFomular("Sum(2,3,16)");
		decimal sum = expr.Eval<decimal>(); 
		Console.WriteLine(sum);// return 21	(sum)
		
		expr.SetFomular("average(2,3,16)");
		decimal average = expr.Eval<decimal>(); 
		Console.WriteLine(average);// return 7 (average)	
	}
}

Round, floor, ceiling

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expr = new Expression("ROUND(2.149, 1)");
		Object value = expr.Eval<Decimal>(); 
		Console.WriteLine("ROUND(2.149, 1) = "+value); //return 2.1
		
		expr = new Expression("FLOOR(2.149)");
		value = expr.Eval(); 
		Console.WriteLine("FLOOR(2.149) = "+value); //return 2	
		
		expr = new Expression("FLOOR(3.7,2)");
		value = expr.Eval(); 
		Console.WriteLine("FLOOR(3.7,2) = "+value);	//return 2
		
		expr = new Expression("CEILING(2.149)");
		value = expr.Eval(); 
		Console.WriteLine("CEILING(2.149) = "+value); //return 3
		
		expr = new Expression("CEILING(1.5, 0.1)");
		value = expr.Eval(); 
		Console.WriteLine("CEILING(1.5, 0.1) = "+value); //return 1.5	
	}
}

Trigonometry

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expr = new Expression("tan(a)^3-((3*sin(a)-sin(3*a))/(3*cos(a)+cos(3*a)))");
		Decimal value = expr.Bind("a", Math.PI/6).Eval<Decimal>(); 
		Console.WriteLine(value); //return 0		
	}
}

Deal with string

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression taxExpr = new Expression("IF(LOWER(TAX_CODE)='vat',amount*10/100,IF(LOWER(TAX_CODE)='gst',amount*15/100,0))");
		taxExpr.Bind("TAX_CODE","GST");
		taxExpr.Bind("amount", 5005m);
		Decimal value = taxExpr.Eval<Decimal>();
		Console.WriteLine(value);
	}
}

Concatenate strings

using System;
using ExpressionEvaluation.Runtime;
					
public class Program
{
	public static void Main()
	{
		Expression expr = new Expression("CONCAT('The United States of ', 'America')");
		String value = expr.Eval<String>();	
		Console.WriteLine(value);//The United States of America	
	}
}

License

MIT license

Product	Compatible and additional computed target framework versions.
.NET	net6.0 is compatible. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 is compatible. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed.

Product

.NET

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net6.0
- No dependencies.
net7.0
- No dependencies.
net8.0
- No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last updated
1.3.0	366	5/31/2024
1.2.0	108	5/31/2024
1.1.1	109	5/31/2024
1.1.0	103	5/31/2024

ExpressionEvaluation.Runtime 1.3.0

About ExpressionEvaluationRuntime

Installation

Official document

Supported operators, contants, functions

Supported Operators

Supported conditional statements

Supported logical and math functions

Supported Constants

Supported text functions

Usage examples

Basic evaluator

Conditional statements

Validate expression

Min, max, sum, avg

Round, floor, ceiling

Trigonometry

Deal with string

Concatenate strings

License

net6.0

net7.0

net8.0

NuGet packages

GitHub repositories