如何将字典分配给组合框的项目（显示和值成员）？

Question

我知道如何将查询中的值分配给 ListBox 的显示和值成员：

using (SqlConnection con = new SqlConnection(ReportRunnerConstsAndUtils.CPSConnStr))
{
    using (SqlCommand cmd = new SqlCommand(ReportRunnerConstsAndUtils.SelectUnitsQuery, con))
    {
        cmd.CommandType = CommandType.Text;
        using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
        {
            DataTable dt = new DataTable();
            sda.Fill(dt);
            ((ListBox)checkedListBoxUnits).DataSource = dt;
            ((ListBox)checkedListBoxUnits).DisplayMember = "Unit";
            ((ListBox)checkedListBoxUnits).ValueMember = "Unit";
        }
    }
}

...以及如何将单个值分配给 ComboBox，如下所示：

List<String> schedulableWeeks = PlatypusUtils.GetWeekBeginnings(WEEKS_COUNT).ToList();
BindingSource bs = new BindingSource();
bs.DataSource = schedulableWeeks;
comboBoxWeekToSchedule.DataSource = bs;

...但是如何将字典分配给组合框，将我的字典的字符串值作为显示值，将日期时间作为值成员？我试过这个：

Dictionary<String, DateTime> schedulableWeeks = 
    PlatypusUtils.GetWeekBeginningsDict(WEEKS_TO_OFFER_COUNT);
BindingSource bs = new BindingSource();
bs.DataSource = schedulableWeeks;
comboBoxWeekToSchedule.DataSource = bs;
comboBoxWeekToSchedule.DisplayMember = schedulableWeeks[0];
comboBoxWeekToSchedule.ValueMember = schedulableWeeks[1];

...认为我可以通过 Dictionary 元素 0 访问字符串，通过元素 1 访问 DateTime，但它甚至不编译 ("Argument 1: cannot convert from 'int' to 'string'") - 两行的错误信息相同。

Answer 1

您尝试过使用 toDictionary() 吗？我不确定 PlatypusUtils.GetWeekBeginningsDict 到底是什么 returns，但我猜这可以解决问题。

Dictionary<String, DateTime> schedulableWeeks = PlatypusUtils.GetWeekBeginningsDict(WEEKS_TO_OFFER_COUNT).ToDictionary(x => x.Key);

也可能是 KeyValuePair 的绑定源问题：

comboBoxWeekToSchedule.DisplayMember = "Key";
comboBoxWeekToSchedule.ValueMember = "Value";

Answer 2

像这样的东西应该可以工作：

BindingSource bs = new BindingSource();
bs.DataSource = schedulableWeeks;
comboBoxWeekToSchedule.DataSource = bs;
comboBoxWeekToSchedule.DisplayMember = "Key";
comboBoxWeekToSchedule.ValueMember = "Value";

基本上，字典中的每个项目都有一个"Key"和一个"Value"，因为字典中的每个项目都是一个KeyValuePair<string,DateTime>

Answer 3

尝试为组合框设置键和值，如下所示：

comboBoxWeekToSchedule.DisplayMember = "Key";
comboBoxWeekToSchedule.ValueMember = "Value";

如何将字典分配给组合框的项目（显示和值成员）？

How can I assign a Dictionary to a combobox's Items (Display and Value Members)?

c#

combobox

dictionary