From simple C# math expression...

int result = Eval.Execute<int>("X + Y", new { X = 1, Y = 2});

To complex code to parse.

int result = Eval.Execute<int>(@"
	var list = new List<int>() { 1, 2, 3, 4, 5 };
	var filter = list.Where(x => x < 4);
	return filter.Sum(x => x);");

Eval Expression.NET improve dramatically performance to access public and private method, field, property value or to create object instance over using C# reflection.

PM> Install-Package Z.Expressions.Eval

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Evaluate and execute the code or expression.

Support:

Anonymous Class

// using Z.Expressions; // Don't forget to include this.
int result = Eval.Execute<int>("X + Y", new { X = 1, Y = 2});

Argument Position

// using Z.Expressions; // Don't forget to include this.
int result = Eval.Execute<int>("{0} + {1}", 1, 2);

Class Member

// using Z.Expressions; // Don't forget to include this.
dynamic expandoObject = new ExpandoObject();
expandoObject.X = 1;
expandoObject.Y = 2;
int result = Eval.Execute<int>("X + Y", expandoObject);

Extension Methods

// using Z.Expressions; // Don't forget to include this.
string s = "X + Y";
int result = s.Execute<int>(new { X = 1, Y = 2 });

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Compile the code or expression and return a delegate.

Support:

Custom Delegate

// using Z.Expressions; // Don't forget to include this.
var compiled = Eval.Compile<Func<int, int, int>>("X + Y", "X", "Y");
foreach(var item in list)
{
	int result = compiled(item.Value1, item.Value2);
}

Extension Methods

// using Z.Expressions; // Don't forget to include this.
string s = "X + Y";
var compiled = s.Compile<Func<int, int, int>>("X", "Y");
foreach(var item in list)
{
	int result = compiled(item.Value1, item.Value2);
}

Learn more

Eval Expression.NET support all C# Syntax:

• All C# Keywords (MSDN Documentation)
• All C# Operators (MSDN Documentation)
• Constant Folding
• Extension Methods
• Generic Type
• Lambda Expression
• Number Suffix

You can even access to C# 6.0 features even if you are using C# 4.0.

• string interpolation
• typename
• null conditional member access

Learn more

Every month, a new monthly trial of the PRO Version is available to let you evaluate all its features without limitations.

The best way to contribute is by spreading the word about the library:

• Blog it
• Comment it
• Fork it
• Star it
• Share it

A HUGE THANKS for your help.

Entity Framework

• EntityFramework Extensions
• EntityFramework Plus

Bulk Operations

• Bulk Operations
• Dapper Plus

Expression Evaluator

• Eval-SQL.NET
• Eval-Expression.NET

Others

• Extension Methods Library
• LINQ Async

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