c# - DataGridView - 使用 DataPropertyName 显示子元素属性

Question

让图像显示我有以下类(class)

public class Master
{
    public string MasterName = "Something";

    public List<Detail> details = new List<Detail>();
}

public class Detail 
{
    public string Foo = "Test";
}

然后我想使用下面的代码在 DataGridView 中显示 Details 对象的集合

DataGridViewTextBoxColumn column = new DataGridViewTextBoxColumn();
column.DataPropertyName = "Details.Foo";
column.HeaderText = "Foo header";

dgv.Columns.Add(column);

该列显示在网格中，但没有值

Answer 1

如果您需要更通用(即使用 DataPropertyName = "MyProp1.MyProp2.MyProp3")，您可以使用这个

private void Grid_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    DataGridViewColumn column = Grid.Columns[e.ColumnIndex];
    if (column.DataPropertyName.Contains("."))
    {
        object data = Grid.Rows[e.RowIndex].DataBoundItem;
        string[] properties = column.DataPropertyName.Split('.');
        for (int i = 0; i < properties.Length && data != null; i++)
            data = data.GetType().GetProperty(properties[i]).GetValue(data);
        Grid.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = data;
    }
}