Create lambda expression for OrderBy based on string

Question

The method

MyMethod

as a string parameter. Based on the value of this parameter, I'd like get back an expression to use with an

OrderBy

. I don't find the right syntax for

Expression<Func<>>

to use with the dictionary (as

TValue

type)

public void MyMethod(string orderBy)

{

    var dico = new Dictionary<string, string>

    {

        { "property1", x => x.Name},

        { "property2", x => x.Age},

    };



    dico.TryGetValue("property1", out string myOrder);



    myList.OrderBy(myOrder)......



}

Update :

var dico = new Dictionary<string, Expression<Func<Person, xxxxx>>>

{

    { "property1", x => x.Name},

    { "property2", x => x.Age},

};

Thanks,

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Answer 1

I think you may get hints from this:

public void MyMethod(string orderBy)
{
    // Assuming Product has 'Name' and 'Age' property ?
    var dico = new Dictionary<string, Expression<Func<Product,object>>>
    {
        { "property1", x => x.Name},
        { "property2", x => x.Age},
    };

    Expression<Func<Product,object>> myorder;
    dico.TryGetValue(orderBy, out myOrder);

    _context.Products.OrderBy(myOrder);
}

Create lambda expression for OrderBy based on string

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