how do you set a defaultparametervalue of null for optional parameters?

Question

So i have a chunk of code like this:

public List<DynamicBusinessObject> GetSearchResultList(Search search, List<CategoryAttribute> listCatAttrib, string sortBy, int startRow, int pageSize, [Optional, DefaultParameterValue("")] string state, [Optional, DefaultParameterValue("")] string condition, [Optional, DefaultParameterValue("")] string manufacturer)

I'd like to know how instead of a default value of "" (empty string) i can instead set it to null? Tried using DBNull.value but it didn't like that.

score 0 · Accepted Answer · answered Oct 23 '12 at 22:16

0

use the = null

public List<DynamicBusinessObject> GetSearchResultList(Search search, List<CategoryAttribute> listCatAttrib, string sortBy, int startRow, int pageSize, string state = null, string condition = null, string manufacturer = null)

answered Oct 23 '12 at 22:16

Florescu Mihai

186
5

No way to do it with DefaultParameterValue? – merk Oct 23 '12 at 22:41

score 0 · Answer 2 · answered Aug 09 '21 at 14:01

0

It should be possible to simply replace the empty string with null like this:

[Optional, DefaultParameterValue(null)] string state

answered Aug 09 '21 at 14:01

Øystein Kolsrud

359
2
16

how do you set a defaultparametervalue of null for optional parameters?

2 Answers2