C# WinForm DataGridView让DataPropertyName支持复杂属性

首先给Grid添加BindingSource，类型为BindingForForm2。或者设置Grid的DataSource为IEnumerable<BindingForForm2>。

BindingForForm2类型如下。

 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; }
    }

我们想在Grid上直接显示BindingForForm2中ClassTest属性的S1和S2属性。可以如下图设置DataPropertyName。直接设置用属性点的方式。

然后如下注册DataGridView的CellFormatting事件即可。代码大致意思是，先取到当前选中行的Object（此处为BindingForForm2），然后取到DataPropertyName的设置，再循环用反射读取想要的值。

  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填充数据

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

GridView显示

转载请注明出处。 http://www.cnblogs.com/JmlSaul/p/7726233.html