Question

我试图让ListBox显示多行表Accommodation的串联。

因为我无法编辑数据源，所以我准备了一个类AccommodationEntity，它包含原始Accommodation对象和我希望ListBox显示的字符串。

但是，由于某种原因，我无法设置ListBox的DisplayMember属性，从而显示默认的jibber-jabber。

我按如下方式设置了列表框：

accommodationList.DisplayMember = "textToShow";
// load and set up accommodation
List<AccommodationEntity> relatedAccommodations = 
    dt.listHolidayAccommodation(relatedHoliday);
accommodationList.DataSource = relatedAccommodations;
accommodationList.Refresh();

存储在数据源中的对象的类如下所示：

class AccommodationEntity
{
    public accommodation classicAccommodation;
    public string textToShow;

    public AccommodationEntity(stay relatedStay)
    {
        this.classicAccommodation = relatedStay.accommodation;

        string from = relatedStay.dateFrom.ToString();
        string to = relatedStay.dateTo.ToString();
        string city = relatedStay.accommodation.location.ToString();
        string hotelName = relatedStay.accommodation.name.ToString();

        this.textToShow = hotelName + ", " + city + " (" + from + " - " + to + ")";
    }
}

} `

最后，有一种方法可以进行一些搜索（返回正确的对象）：

public List<AccommodationEntity> listHolidayAccommodation(holiday selectedHoliday)
{
    List<AccommodationEntity> ubytovani = new List<AccommodationEntity>();

    var stays = from singleStay in selectedHoliday.stays
                select singleStay;

    foreach (stay singleStay in stays)
    {
        AccommodationEntity newStay = new AccommodationEntity(singleStay);
        ubytovani.Add(newStay);
    }

    return ubytovani;
}

我知道dataSource包含正确的数据，但出于某种原因，DisplayMember属性似乎仍然设置为""。

任何帮助都将不胜感激。

感谢。

Answer 1

您是否设置了DisplayMember和ValueMember属性？查看MSDN上的DataSource属性，了解它们如何设置所有三个属性。

<强>更新

尝试切换：

accommodationList.DisplayMember = "textToShow";
// load and set up accommodation
List<AccommodationEntity> relatedAccommodations = 
    dt.listHolidayAccommodation(relatedHoliday);
accommodationList.DataSource = relatedAccommodations;

到此：

// load and set up accommodation
List<AccommodationEntity> relatedAccommodations = 
    dt.listHolidayAccommodation(relatedHoliday);
accommodationList.DataSource = relatedAccommodations;
accommodationList.DisplayMember = "textToShow";

Answer 2

您是否尝试像这样设置DisplayMember和DisplayValue。其中“名称”/“值”是住宿类中的财产名称。

List<AccommodationEntity> relatedAccommodations = dt.listHolidayAccommodation(relatedHoliday);
accommodationList.DataSource = relatedAccommodations;
accommodationList.DisplayMember = "Name";
accommodationList.ValueMember = "Value";

<强>更新

确保textToShow实际上是一个属性，而不仅仅是一个公共字段。

多个DisplayMember使用特殊类

2 个答案: