Question

我需要基于以下两个类来设置DataGridView

public class Selection 
{
    public string Display { get; protected set; }
    public int Value { get; protected set; }

    public Selection( string d, int v)
    {
        Display = d; Value = v;
    }
}

public class TestData
{
    public Selection Selection { get; protected set; }
    public int Quantity { get; protected set; }

    public TestData( Selection sel, int q)
    {
        Selection = sel;
        Quantity = q;
    }
}

TestData对象是行。用户必须从由列表或类似内容填充的ComboBox列中选择一个Selection。但是TestData集合必须是BindingList才能添加或删除行，因此，它是datagrid DataSource。到目前为止，我正在尝试使用以下代码设置de grid

    List<Selection> getSelectionList()
    {
        List<Selection> result = new List<Selection>();

        result.Add(new Selection("Zero", 0));
        result.Add(new Selection("One", 10));
        result.Add(new Selection("Two", 20));
        result.Add(new Selection("Three", 30));
        result.Add(new Selection("Four", 40));
        result.Add(new Selection("Five", 50));
        result.Add(new Selection("Six", 60));

        return result;
    }

    List<TestData> getTestDataList(List<Selection> reference)
    {
        List<TestData> result = new List<TestData>();
        result.Add(new TestData(reference[1], 10));

        return result;
    }

................
        DataGridViewComboBoxColumn combo = (DataGridViewComboBoxColumn)dataGridView1.Columns[0];
        List<Selection> list = getSelectionList();
        combo.DataSource = list;
        combo.DisplayMember = "Display";
        combo.ValueMember = "Value";

        BindingList<TestData> source = new BindingList<TestData>(getTestDataList(list)) { AllowEdit = true, AllowNew = true, AllowRemove = true };

        dataGridView1.DataSource = source;
................

但是结果很烦人： a）网格显示两行（即使我在TestData列表中仅设置了一个元素） b）组合单元中没有数据。

我该如何解决？

TIA

Answer 1

您只需要添加两行：

string key = ((KeyValuePair<string, string>)combo.SelectedItem).Key;
string value = ((KeyValuePair<string, string>)combo.SelectedItem).Value;

Datagridview允许用户使用组合框列添加或删除行

1 个答案: