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How to use NCalcScalarResolverArgs class of NBi.Core.Scalar.Resolver package

Best NBi code snippet using NBi.Core.Scalar.Resolver.NCalcScalarResolverArgs

NCalcScalarResolverTest.cs

Source:NCalcScalarResolverTest.cs

...17            using (var dt = new DataTable())18            {19                var row = dt.NewRow();20                var context = new Context(null);21                var args = new NCalcScalarResolverArgs("1+1", context);22                context.Switch(row);23                var resolver = new NCalcScalarResolver<object>(args);24                var output = resolver.Execute();25                Assert.That(output, Is.EqualTo(2));26            }27        }28        [Test]29        public void Instantiate_WithRowValuesBasedOnNames_CorrectComputation()30        {31            using (var dt = new DataTable())32            {33                dt.Columns.Add("a", typeof(int));34                dt.Columns.Add("b", typeof(int));35                dt.Columns.Add("c", typeof(int));36                var row = dt.NewRow();37                var context = new Context(null);38                row.ItemArray = new object[] { 2, 5, 3 };39                var args = new NCalcScalarResolverArgs("a*Max(b, c)-2", context);40                context.Switch(row);41                var resolver = new NCalcScalarResolver<object>(args);42                var output = resolver.Execute();43                Assert.That(output, Is.EqualTo(2*Math.Max(5,3)-2));44            }45        }46        [Test]47        public void Instantiate_WithRowValuesBasedOnBracketNames_CorrectComputation()48        {49            using (var dt = new DataTable())50            {51                dt.Columns.Add("a", typeof(int));52                dt.Columns.Add("b", typeof(int));53                dt.Columns.Add("c", typeof(int));54                var row = dt.NewRow();55                row.ItemArray = new object[] { 2, 5, 3 };56                var context = new Context(null);57                var args = new NCalcScalarResolverArgs("[a]*Max([b], [c])-2", context);58                context.Switch(row);59                var resolver = new NCalcScalarResolver<object>(args);60                var output = resolver.Execute();61                Assert.That(output, Is.EqualTo(2 * Math.Max(5, 3) - 2));62            }63        }64        [Test]65        public void Instantiate_WithRowValuesBasedOnOrdinals_CorrectComputation()66        {67            using (var dt = new DataTable())68            {69                dt.Columns.Add("a", typeof(int));70                dt.Columns.Add("b", typeof(int));71                dt.Columns.Add("c", typeof(int));72                var row = dt.NewRow();73                row.ItemArray = new object[] { 2, 5, 3 };74                var context = new Context(null);75                var args = new NCalcScalarResolverArgs("[#0]*Max([#1], [#2])-2", context);76                context.Switch(row);77                var resolver = new NCalcScalarResolver<object>(args);78                var output = resolver.Execute();79                Assert.That(output, Is.EqualTo(2 * Math.Max(5, 3) - 2));80            }81        }82        [Test]83        public void Instantiate_WithRowValuesBasedOnOrdinalsAndVariable_CorrectComputation()84        {85            using (var dt = new DataTable())86            {87                dt.Columns.Add("a", typeof(int));88                dt.Columns.Add("b", typeof(int));89                dt.Columns.Add("c", typeof(int));90                var row = dt.NewRow();91                row.ItemArray = new object[] { 2, 5, 3 };92                var context = new Context(new Dictionary<string, IVariable> { { "myVar", new GlobalVariable(new LiteralScalarResolver<decimal>(10)) } });93                var args = new NCalcScalarResolverArgs("[#0]*Max([#1], [#2])-[@myVar]", context);94                context.Switch(row);95                var resolver = new NCalcScalarResolver<object>(args);96                var output = resolver.Execute();97                Assert.That(output, Is.EqualTo(2 * Math.Max(5, 3) - 10));98            }99        }100    }101}...

NCalcScalarResolver.cs

Source:NCalcScalarResolver.cs

...12namespace NBi.Core.Scalar.Resolver13{14    class NCalcScalarResolver<T> : IScalarResolver<T>15    {16        private NCalcScalarResolverArgs Args { get; }17        public NCalcScalarResolver(NCalcScalarResolverArgs args)18            => Args = args;19        public T Execute()20        {21            var exp = new NCalc.Expression(Args.Code);22            var factory = new ColumnIdentifierFactory();23            exp.EvaluateParameter += delegate (string name, NCalc.ParameterArgs args)24            {25                args.Result = name.StartsWith("@")26                    ? Args.Context.Variables[name.Substring(1, name.Length - 1)].GetValue()27                    : GetValueFromRow(Args.Context.CurrentRow, factory.Instantiate(name));28            };29            var rawValue = exp.Evaluate();30            return (T)Convert.ChangeType(rawValue, typeof(T));31        }...

NCalcScalarResolverArgs.cs

Source:NCalcScalarResolverArgs.cs

...6using System.Threading.Tasks;7using NBi.Core.Variable;8namespace NBi.Core.Scalar.Resolver9{10    class NCalcScalarResolverArgs : IScalarResolverArgs11    {12        public string Code { get; }13        public Context Context { get; }14        public NCalcScalarResolverArgs(string code, Context context)15         => (Code, Context) = (code, context);16    }17}...

NCalcScalarResolverArgs

Using AI Code Generation

1using NBi.Core.Scalar.Resolver;2using System;3using System.Collections.Generic;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7{8    {9        static void Main(string[] args)10        {11            NCalcScalarResolverArgs ncalcScalarResolverArgs = new NCalcScalarResolverArgs();12            ncalcScalarResolverArgs.Expression = "1+2";13            ncalcScalarResolverArgs.Format = "decimal";14            ncalcScalarResolverArgs.Culture = "en-US";15            NCalcScalarResolver ncalcScalarResolver = new NCalcScalarResolver(ncalcScalarResolverArgs);16            Console.WriteLine(ncalcScalarResolver.Execute());17            Console.ReadLine();18        }19    }20}21using NBi.Core.Scalar.Resolver;22using System;23using System.Collections.Generic;24using System.Linq;25using System.Text;26using System.Threading.Tasks;27{28    {29        static void Main(string[] args)30        {31            NCalcScalarResolverArgs ncalcScalarResolverArgs = new NCalcScalarResolverArgs();32            ncalcScalarResolverArgs.Expression = "1+2";33            ncalcScalarResolverArgs.Format = "decimal";34            ncalcScalarResolverArgs.Culture = "en-US";35            NCalcScalarResolver ncalcScalarResolver = new NCalcScalarResolver(ncalcScalarResolverArgs);36            Console.WriteLine(ncalcScalarResolver.Execute());37            Console.ReadLine();38        }39    }40}41using NBi.Core.Scalar.Resolver;42using System;43using System.Collections.Generic;44using System.Linq;45using System.Text;46using System.Threading.Tasks;47{48    {49        static void Main(string[] args)50        {51            NCalcScalarResolverArgs ncalcScalarResolverArgs = new NCalcScalarResolverArgs();52            ncalcScalarResolverArgs.Expression = "1+2";53            ncalcScalarResolverArgs.Format = "decimal";54            ncalcScalarResolverArgs.Culture = "en-US";55            NCalcScalarResolver ncalcScalarResolver = new NCalcScalarResolver(ncalcScalarResolverArgs);

NCalcScalarResolverArgs

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using NBi.Core.Scalar.Resolver;7using System.Data;8{9    {10        static void Main(string[] args)11        {12            NCalcScalarResolverArgs nCalcScalarResolverArgs = new NCalcScalarResolverArgs();13            nCalcScalarResolverArgs.Expression = "1+1";14            NCalcScalarResolver nCalcScalarResolver = new NCalcScalarResolver(nCalcScalarResolverArgs);15            var result = nCalcScalarResolver.Execute();16            Console.WriteLine(result);17            Console.ReadKey();18        }19    }20}21using System;22using System.Collections.Generic;23using System.Linq;24using System.Text;25using System.Threading.Tasks;26using NBi.Core.Scalar.Resolver;27using System.Data;28{29    {30        static void Main(string[] args)31        {32            NCalcScalarResolverArgs nCalcScalarResolverArgs = new NCalcScalarResolverArgs();33            nCalcScalarResolverArgs.Expression = "1+1";34            nCalcScalarResolverArgs.Variables = new Dictionary<string, object>()35            {36                { "a", 1 },37                { "b", 2 }38            };39            NCalcScalarResolver nCalcScalarResolver = new NCalcScalarResolver(nCalcScalarResolverArgs);40            var result = nCalcScalarResolver.Execute();41            Console.WriteLine(result);42            Console.ReadKey();43        }44    }45}

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