如何在LINQ的where子句中传递动态条件？

Question

How can I write a dynamic query, and how to pass it into a where condition?

var query = "Name = 'Test'";

//Get data by passing dynamic query
var result = from Table01 in T0001
    where(query)
    select Table01 ;

Answer 1

You can use System.Linq.Dynamic so that you can build query dynamically:

var query = "Name == \"Test\"";

var result = dbContext.T0001.Where(query).ToList();

Answer 2

You add a reference to System.Linq.Dynamic or System.Linq.Dynamic.Core depending on the kind of project you have (it's a lot easier to get the deprecated package to play nice with a framework winforms project for example) and the flavour of .net it uses - see https://dynamic-linq.net/ for example use.

The code would be pretty much as you have there except you wouldn't use apostrophes to delimit the string because apostrophes are for chars. You could use \\" but the more typical way to do it is like

Where("Name = @0", "Test")