原文:WPF 动态生成对象属性 （dynamic）

 

 

 

项目中列行的数据 都需要动态生成 所以考虑到对象绑定  可需要一个动态生成属性的意思

缺点 加载速度会慢 很明显的慢

解决办法 尽量减轻动态属性的量~

参考文章

https://www.cnblogs.com/maomiyouai/p/3594132.html

https://www.cnblogs.com/dingli/archive/2012/06/14/2548687.html（这个没看明白 但是冥冥中让我觉得 收藏一下以后可能会用）

代码

属性类   想研究明白的 看参考文章

 public class NurseScheduleStatisticsModel : DynamicObject
    {
 
 
        Dictionary<string, object> Properties = new Dictionary<string, object>();
 
        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            if (!Properties.Keys.Contains(binder.Name))
            {
            
                Properties.Add(binder.Name, value.ToString());
            }
            return true;
        }
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            return Properties.TryGetValue(binder.Name, out result);
        }
    }

生成临时数据

       private ObservableCollection<NurseScheduleStatisticsModel> GetNameDataLlist()
        {
     
            dynamic model = new NurseScheduleStatisticsModel();
            model.Name = "市川 賞子";
            model.Class_ = "B";
            model.JOb = "リーダー";
            model.Num = "1";
            model.Num1 = "r1";
            model.Num2 = "R1";
            model.Num3 = "r1";
            model.Num4 = "r1";
            model.Num5 = "T1";
            dynamic model2 = new NurseScheduleStatisticsModel();
            model2.Name = "石田";
            model2.Class_ = "B";
            model2.JOb = "リーダー";
            model2.Num = "2";
            model2.Num1 = "r2";
            model2.Num2 = "R2";
            model2.Num3 = "r3";
            model2.Num4 = "r2";
            model2.Num5 = "T2";
            dynamic model3 = new NurseScheduleStatisticsModel();
            model3.Name = "安达 鮎美";
            model3.Num = "3";
            model3.Class_ = "B";
            model3.JOb = "リーダー";
            model3.Num1 = "r2";
            model3.Num2 = "R3";
            model3.Num3 = "r2";
            model3.Num4 = "r3";
            model3.Num5 = "T3";
        
            modelList.Add(model);
            modelList.Add(model2);
            modelList.Add(model3);
      
 
 
            return modelList;
 
        }

动态增加列和绑定datagrid

dl.Binding = new Binding("Num" + (i + 1) );

这里的bing 绑定的就是对象里的Num1~开始的对象  

      for (int i = 0; i < 10; i++)
			{ 
                 DataGridTextColumn dl = new DataGridTextColumn();
                dl.Header='num'+i;
              
                dl.Binding = new Binding("Num" + (i + 1) );
                dataGrid.Columns.Add(dl);
			}
dataGrid.ItemsSource = GetNameDataLlist();

 

我在项目里 使用一个自定义对象 来包含 dynamic 动态对象 减少不必要的开销

 

对象 

    public class NameList : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
 
        public NameList(string name, string jOb, string class_, int num, NurseScheduleStatisticsModel model) { Name = name; Class_ = class_; JOb = jOb; Num = num; Ml = model; }
      
  
        private string name;
 
        public string Name
        {
            get { return name; }
            set
            {
                name = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Name"));
                }
 
            }
        }
        private int num;
 
        public int Num
        {
            get { return num; }
            set
            {
                num = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Num"));
                }
            }
        }
        private string class_;
 
        public string Class_
        {
            get { return class_; }
            set
            {
                class_ = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Class_"));
                }
            }
        }
 
 
 
        private string jOb;
 
        public string JOb
        {
            get { return jOb; }
            set
            {
                jOb = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("JOb"));
                }
            }
        }
 
        private NurseScheduleStatisticsModel ml;
 
        public NurseScheduleStatisticsModel Ml
        {
            get { return ml; }
            set { ml = value;
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs("Ml"));
            }
            }
        }
 
  
 
    }

模拟数据

  private ObservableCollection<NameList> GetNameDataLlist2()
        {
 
            dynamic model = new NurseScheduleStatisticsModel();
 
            model.Num1 = "r1";
            model.Num2 = "R1";
            model.Num3 = "r1";
            model.Num4 = "r1";
            model.Num5 = "T1";
            dynamic model2 = new NurseScheduleStatisticsModel();
 
            model2.Num1 = "r2";
            model2.Num2 = "R2";
            model2.Num3 = "r3";
            model2.Num4 = "r2";
            model2.Num5 = "T2";
            dynamic model3 = new NurseScheduleStatisticsModel();
 
            model3.Num1 = "r2";
            model3.Num2 = "R3";
            model3.Num3 = "r2";
            model3.Num4 = "r3";
            model3.Num5 = "T3";
 
            //modelList.Add(model);
            //modelList.Add(model2);
            //modelList.Add(model3);
 
            listName.Add(new NameList("市川 賞子", "リーダー", "B", 1, model));
            listName.Add(new NameList("石田", "リーダー", "C", 2, model2));
            listName.Add(new NameList("安达 鮎美", "リーダー", "C", 3, model3));
 
            return listName;
 
        }

 

绑定动态列

需要在套一层Ml对象来引用

    for (int i = 0; i < LS.Count; i++)
			{ 
                 DataGridTextColumn dl = new DataGridTextColumn();
                dl.Header=LS[i];
              
                dl.Binding = new Binding("Ml.Num" + (i + 1) );
                dataGrid.Columns.Add(dl);
			}

 

就是慢 的有这点数据量就要4秒~6秒 loading加载提示肯定是要有了

希望有人有更好 更成熟的方法