C# 类动态添加属性、方法

2021/10/1 9:40:45

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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() 

复制代码
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;
                }
            }
        }
复制代码 复制代码
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);
        }
    }
复制代码

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

 

原文地址:http://www.cnblogs.com/maomiyouai/p/3594132.html



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