C# WinForm DataGridView讓DataPropertyName支持復雜屬性

首先給Grid添加BindingSource，類型為BindingForForm2。或者設置Grid的DataSource為IEnumerable<BindingForForm2>。

BindingForForm2類型如下。

 public class BindingForForm2
    {
        public int Age { get; set; }
        public string Name { get; set; }
        public int Height { get; set; }
        public int Weight { get; set; }
        public ClassTest ClassTest { get; set; }

    }

    public class ClassTest
    {
        public string S1 { get; set; }
        public string S2 { get; set; }
    }

 

 我們想在Grid上直接顯示BindingForForm2中ClassTest屬性的S1和S2屬性。可以如下圖設置DataPropertyName。直接設置用屬性點的方式。

然后如下注冊DataGridView的CellFormatting事件即可。代碼大致意思是，先取到當前選中行的Object（此處為BindingForForm2），然后取到DataPropertyName的設置，再循環用反射讀取想要的值。

 private void DataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            if (e.Value != null) return;
            try
            {
                var dgv = (DataGridView)sender;
                object obj = null;
                var source = dgv.DataSource as BindingSource;
                if (source != null)
                {
                    obj = ((IEnumerable<object>)source.DataSource).ElementAt(e.RowIndex);
                }
                else if (dgv.DataSource is IEnumerable<object>)
                {
                    obj = ((IEnumerable<object>)dgv.DataSource).ElementAt(e.RowIndex);
                }
                var col = dgv.Columns[e.ColumnIndex];
                var props = col.DataPropertyName.Split('.');
                foreach (var prop in props)
                {
                    if (obj == null) return;
                    var p = obj.GetType().GetProperty(prop);
                    if (p == null) return;
                    obj = p.GetValue(obj, null);
                }
                e.Value = obj;
            }
            catch
            {
                //ignore
            }
        }

 

 

效果：

bindingSource填充數據

 bindingForForm2BindingSource.DataSource = new List<BindingForForm2>
            {
                new BindingForForm2 {Age = 10, Height = 120, Name = "xxx", ClassTest = new ClassTest {S1 = "sdjfkljlk"}},
                new BindingForForm2 {Age = 12, Height = 120, Name = "asd", ClassTest = new ClassTest {S2 = "ccccccc"}},
                new BindingForForm2 {Age = 14, Height = 120, Name = "asdd"}
            };

GridView顯示

 

轉載請注明出處。 http://www.cnblogs.com/JmlSaul/p/7726233.html