将在运行时通过反射创建的DbSet 传递给Queryable(Passing A DbSet created at runtime via reflection to Queryable)

 我正在尝试执行动态linq查询，其中我的DbSet类型是在运行时通过反射创建的我得到错误： 
 
 
 
 “最好的重载方法匹配'System.Linq.Queryable.Where（System.Linq.IQueryable，System.Linq.Expressions.Expression>）'有一些无效的参数” 
 
 
 这是我的代码 
 
MyDataContext db = new MyDataContext ();
var dbType = db.GetType();
var dbSet = dbType.GetProperty("MyType").GetValue(db,null);
dbSet.GetType().InvokeMember("Local", BindingFlags.GetProperty, null, dbSet , null)
//just to show that it equal
dbSet.Equals(db.MyType); //returns true;
//here i create a dynamic expression tree 
dynamic l = Expression.Lambda(delagateType, greater, param);

//here it fails when i pass in my dbSet var but not when i pass db.MyType
dynamic q =   ((IEnumerable<object>)Queryable.Where(dbSet , l)).ToList();

I'm trying to execute a dynamic linq query where my DbSet Type is created at runtime via reflection an I'm getting the error:
 
 
 
"The best overloaded method match for 'System.Linq.Queryable.Where(System.Linq.IQueryable, System.Linq.Expressions.Expression>)' has some invalid arguments"
 
 
Here's my code
 
MyDataContext db = new MyDataContext ();
var dbType = db.GetType();
var dbSet = dbType.GetProperty("MyType").GetValue(db,null);
dbSet.GetType().InvokeMember("Local", BindingFlags.GetProperty, null, dbSet , null)
//just to show that it equal
dbSet.Equals(db.MyType); //returns true;
//here i create a dynamic expression tree 
dynamic l = Expression.Lambda(delagateType, greater, param);

//here it fails when i pass in my dbSet var but not when i pass db.MyType
dynamic q =   ((IEnumerable<object>)Queryable.Where(dbSet , l)).ToList();

原文：https://stackoverflow.com/questions/35894273