DataGridview绑定复杂对象

DataGridview绑定复杂对象

假设有一个类

class Person    {        PRivate string id;        private string name;        private Address homeAddr;        public string ID        {            get { return id; }            set { id = value; }        }        public string Name        {            get { return name; }            set { name = value; }        }        public Address HomeAddr        {            get { return homeAddr; }            set { homeAddr = value; }        }    }    class Address    {        private string cityname;        private string postcode;        public string CityName        {            get { return cityname; }            set { cityname = value; }        }        public string PostCode        {            get { return postcode; }            set { postcode = value; }        }    }

将类绑定到Datagridview

List<Person> lst = new List<Person>();            for (int i = 0; i < 10000; ++i)            {                lst.Add(new Person()                {                    ID = "1",                    Name = "name",                    HomeAddr = new Address() { CityName = “CityName”, PostCode = “PostCode ”}                });            }            dataGridView1.DataSource = lst;

其实值已经有了，只是Datagridview不显示。可以通过DataPropertyName指定子属性名字，在CellFormatting事件中通过反射获取。

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)        {            if ((dataGridView1.Rows[e.RowIndex].DataBoundItem != null) &&                (dataGridView1.Columns[e.ColumnIndex].DataPropertyName.Contains(".")))            {                string[] names = dataGridView1.Columns[e.ColumnIndex].DataPropertyName.Split('.');                object obj = dataGridView1.Rows[e.RowIndex].DataBoundItem;                for (int i = 0; i < names.Count(); ++i)                {                    try                    {                        var result = obj.GetType().GetProperty(names[i]).GetValue(obj, null);                        obj = result;                        e.Value = result.ToString();                    }                    catch (Exception)                    {                        return;                        throw;                    }                }            }        }

结果发现Datagridview列多了

可以指定dataGridView1的AutoGenerateColumns属性为false，让datagridview不自动生成列。（要在绑定前指定）

• 如果字属性只有一个属性要显示，可以直接override字属性的ToString方法。
• msdn上有人用特性实现，不过我试了下貌似不行。http://blogs.msdn.com/b/msdnts/archive/2007/01/19/how-to-bind-a-datagridview-column-to-a-second-level-property-of-a-data-source.aspx