❔ Flee Library, Issue add Variable to Variable Collection with Null Value

I'm using flee third party Library to evaluate expression .
I want to add Variable to expression with null value like this code in below

ExpressionContext context= new ExpressionContext ();
var variables = context.Varibles;

variables.Add("a",null);

var compile = context.CompileGeneric<bool>("((a is not null) and (a>5))");
var result = compile.Evaluate();

ExpressionContext context= new ExpressionContext ();
var variables = context.Varibles;

variables.Add("a",null);

var compile = context.CompileGeneric<bool>("((a is not null) and (a>5))");
var result = compile.Evaluate();

I got exception ArgumentNullException .
is there any way to add variable with null value.
Note : i wouldn't to check value in code because the string expression is input from user

C#•4y ago•

2 replies

saeed_AlRabid

❔ Flee Library, Issue add Variable to Variable Collection with Null Value

I'm using flee third party Library to evaluate expression .
I want to add Variable to expression with null value like this code in below

ExpressionContext context= new ExpressionContext ();
var variables = context.Varibles;

variables.Add("a",null);

var compile = context.CompileGeneric<bool>("((a is not null) and (a>5))");
var result = compile.Evaluate();

ExpressionContext context= new ExpressionContext ();
var variables = context.Varibles;

variables.Add("a",null);

var compile = context.CompileGeneric<bool>("((a is not null) and (a>5))");
var result = compile.Evaluate();

I got exception ArgumentNullException .
is there any way to add variable with null value.
Note : i wouldn't to check value in code because the string expression is input from user

❔ Flee Library, Issue add Variable to Variable Collection with Null Value

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