C# 类动态添加属性、方法
C# 类动态添加属性、方法
问题:
需要动态为WPF中的DataGrid添加列,并动态绑定相应数据.(此处仅实现动态属性的添加和使用,关于动态方法的添加和使用详见推荐阅读)
实现关键点:
目标类继承DynamicObject,添加动态属性集合,并重写方法TrySetMember()和TryGetMember()
public void BtnQuery() { var view = this.GetView() as MainScreenView; if (view != null) { view.dgdNurseScheduleStatistics.Columns.Clear(); var scheduleClassList = Connectors.NurseScheduleStatisticsConnector.GetInstance.FindScheduleClassList().OrderBy(item => item.Id); if (scheduleClassList != null) { List<NurseScheduleStatisticsModel> modelList = new List<NurseScheduleStatisticsModel>(); for (int i = 0; i < 10; i++) { dynamic model = new NurseScheduleStatisticsModel(); model.col0 = i; model.col1 = i; model.col2 = i; model.col3 = i; model.col4 = i; modelList.Add(model); } for (int i = 0; i < 5; i++) { DataGridTextColumn column = new DataGridTextColumn(); column.Header = "col" + i; column.Binding = new Binding("col" + i); view.dgdNurseScheduleStatistics.Columns.Add(column); } view.dgdNurseScheduleStatistics.ItemsSource = modelList; } } }
public class NurseScheduleStatisticsModel : DynamicObject { public string EmpName { get; set; } public string TotalHour { get; set; } public string TotalWork { get; set; } Dictionary<string, object> Properties = new Dictionary<string, object>(); public override bool TrySetMember(SetMemberBinder binder, object value) { if (!Properties.Keys.Contains(binder.Name)) {
//在此可以做一些小动作
//if (binder.Name == "Col")
// Properties.Add(binder.Name + (Properties.Count), value.ToString());
//else
// Properties.Add(binder.Name, value.ToString());
Properties.Add(binder.Name, value.ToString()); } return true; } public override bool TryGetMember(GetMemberBinder binder, out object result) { return Properties.TryGetValue(binder.Name, out result); } }
效果图:
推荐阅读:http://www.cnblogs.com/serviceboy/archive/2010/04/16/1713688.html
http://msdn.microsoft.com/zh-cn/library/system.dynamic.dynamicobject.trysetmember(v=vs.110).aspx