public void Enumerable_GetMethod_Any()
{
MethodInfo anyMethod = EnumerableMethodInfo.Any <int>();
Assert.NotNull(anyMethod);
Assert.True(anyMethod.IsGenericMethod);
}
public void Enumerable_GetMethod_Select()
{
MethodInfo selectMethod = EnumerableMethodInfo.Select <int, int>();
Assert.NotNull(selectMethod);
Assert.True(selectMethod.IsGenericMethod);
}
public void ChangeBinaryToMethodCall()
{
var addresses = Expression.MakeMemberAccess(
Expression.Parameter(typeof(Person), "person"),
typeof(Person).GetProperty(nameof(Person.Addresses)));
var count = Expression.MakeMemberAccess(addresses, typeof(Address).GetProperty("Count"));
// person.PersonId == "1"
BinaryExpression personIdEqualsOne =
Expression.MakeBinary(
ExpressionType.Equal,
Expression.MakeMemberAccess(
Expression.Parameter(typeof(Person), "person"),
typeof(Person).GetProperty(nameof(Person.PersonId))),
Expression.Constant("1"));
// person.PersonId
Expression personId = personIdEqualsOne.Left;
// person.Addresses
MemberExpression personAddresses = new ChangeMemberProperty(
typeof(Person),
personId,
nameof(Person.Addresses))
.Change();
// Select method
MethodInfo selectMethod = EnumerableMethodInfo.Select <Address, int>();
// address
ParameterExpression addressParam = Expression.Parameter(typeof(Address), "address");
// address.AddressId
MemberExpression memberAccess = Expression.MakeMemberAccess(
addressParam,
typeof(Address).GetProperty(nameof(Address.AddressId)));
// address => address.AddressId
LambdaExpression lambda = Expression.Lambda(
memberAccess,
addressParam
);
// person.Addresses.Select(address => address.AddressId)
MethodCallExpression selectAddresses = Expression.Call(selectMethod, new List <Expression> {
personAddresses, lambda
});
Assert.NotNull(selectAddresses);
}