Question

 List<DynamicBusinessObject> dbo = SearchController.Instance.GetSearchResultList(search, null, "date", startRow - 1, ucDataPager1.PageSize, state);

The above line of code is calling the GetSearchResultList method which up until now had 5 arguments.

I added a 6th argument but wanted to make this argument optional so that all the other pages that call this function don’t need to be updated just yet.

So i changed the function to look like this:

        [System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Select, true)]
    public List<DynamicBusinessObject> GetSearchResultList(Search search, List<CategoryAttribute> listCatAttrib, string sortBy, int startRow, int pageSize, [Optional, DefaultParameterValue("")] string state)
    {
        StorageQuery qry = new QrySearchResult(
            search.ID,
            (listCatAttrib != null && listCatAttrib.Count > 0) ? listCatAttrib[0].Attribute.ID : -1,
            (listCatAttrib != null && listCatAttrib.Count > 1) ? listCatAttrib[1].Attribute.ID : -1,
            (listCatAttrib != null && listCatAttrib.Count > 2) ? listCatAttrib[2].Attribute.ID : -1,
            1, sortBy, startRow, pageSize, state);
        List<DynamicBusinessObject> list = BusinessObject.Search(qry);
        return list;
    }

However, when i try to build, it gives me the error that GetSearchResultList has no overload method and takes 5 arguments.
I also tried doing string state = “” instead of using [Optional]

Anyone got any ideas why it’s complaining about me not passing 6 arguments when i make the call if the 6th argument is optional?

Answer 1

You should be able to use:

..., string state = "") {

One possible issue is that your project is targeting an older version of .NET. Check the project properties to make sure it is pointing at the correct version.