OrderByDynamic: Value cannot be null. (Parameter 'type')

[wtujvk]

Throw Exception: System.ArgumentNullException:“Value cannot be null. ”
// Type: System.Linq.EnumerableDynamic
// Assembly: Z.Expressions.Eval, Version=4.0.1.0, Culture=neutral, PublicKeyToken=59b66d028979105b
// MVID: 1B08F7D4-0A7D-4667-AB72-4B641D269972
// Assembly location: C:\Users\xx.nuget\packages\z.expressions.eval\4.0.1\lib\netstandard2.1\Z.Expressions.Eval.dll
nuget: System.Linq.Dynamic.Core 1.1.5

[TestClass]
public class Demo
{
    [TestMethod]
    public void OrderByDynamicTest()
    {
      IEnumerable<Model> list = new List<Model>()
      {
       new Model(){ Name = "jack", Age = 44}
      };
        var orderExpression = "name asc";
        var result = list.OrderByDynamic(orderExpression);
        Assert.IsNotNull(result);
    }
 }

public class Model
 {
      public string Name { get; set; }

      public int Age { get; set; }
 }

[JonathanMagnan]

Hello @wtujvk ,

You are currently mixing System.Linq.Dynamic.Core syntax with the C# Eval Expression library

System.Linq.Dynamic.Core

You must use the OrderBy method, not OrderByDynamic which is belongs our other library.

Here are some example of use:

• https://dynamic-linq.net/basic-simple-query#ordering-results
• https://dotnetfiddle.net/GdxsMG

C# Eval Expression

Require the same syntax as C#, so "x => x.Name"

Let me know if everything is clear,

Best Regards,

Jon

---

Performance Libraries
context.BulkInsert(list, options => options.BatchSize = 1000);
Entity Framework Extensions • Entity Framework Classic • Bulk Operations • Dapper Plus

Runtime Evaluation
Eval.Execute("x + y", new {x = 1, y = 2}); // return 3
C# Eval Function • SQL Eval Function

[wtujvk]

use nuget System.Linq.Dynamic.Core 1.2.8, it work ok like this:

using System.Linq;
using System.Linq.Dynamic.Core;

var result = list.AsQueryable().OrderBy(orderExpression);