WPF 动态生成对象属性 （dynamic）

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原文:WPF 动态生成对象属性 （dynamic）

 

 

 

技术图片

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

  1.  public class NurseScheduleStatisticsModel : DynamicObject
  2.     {
  3.  
  4.  
  5.         Dictionary<string, object> Properties = new Dictionary<string, object>();
  6.  
  7.         public override bool TrySetMember(SetMemberBinder binder, object value)
  8.         {
  9.             if (!Properties.Keys.Contains(binder.Name))
  10.             {
  11.             
  12.                 Properties.Add(binder.Name, value.ToString());
  13.             }
  14.             return true;
  15.         }
  16.         public override bool TryGetMember(GetMemberBinder binder, out object result)
  17.         {
  18.             return Properties.TryGetValue(binder.Name, out result);
  19.         }
  20.     }

生成临时数据

  1.        private ObservableCollection<NurseScheduleStatisticsModel> GetNameDataLlist()
  2.         {
  3.      
  4.             dynamic model = new NurseScheduleStatisticsModel();
  5.             model.Name = "市川 賞子";
  6.             model.Class_ = "B";
  7.             model.JOb = "リーダー";
  8.             model.Num = "1";
  9.             model.Num1 = "r1";
  10.             model.Num2 = "R1";
  11.             model.Num3 = "r1";
  12.             model.Num4 = "r1";
  13.             model.Num5 = "T1";
  14.             dynamic model2 = new NurseScheduleStatisticsModel();
  15.             model2.Name = "石田";
  16.             model2.Class_ = "B";
  17.             model2.JOb = "リーダー";
  18.             model2.Num = "2";
  19.             model2.Num1 = "r2";
  20.             model2.Num2 = "R2";
  21.             model2.Num3 = "r3";
  22.             model2.Num4 = "r2";
  23.             model2.Num5 = "T2";
  24.             dynamic model3 = new NurseScheduleStatisticsModel();
  25.             model3.Name = "安达 鮎美";
  26.             model3.Num = "3";
  27.             model3.Class_ = "B";
  28.             model3.JOb = "リーダー";
  29.             model3.Num1 = "r2";
  30.             model3.Num2 = "R3";
  31.             model3.Num3 = "r2";
  32.             model3.Num4 = "r3";
  33.             model3.Num5 = "T3";
  34.         
  35.             modelList.Add(model);
  36.             modelList.Add(model2);
  37.             modelList.Add(model3);
  38.       
  39.  
  40.  
  41.             return modelList;
  42.  
  43.         }

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  

  1.       for (int i = 0; i < 10; i++)
  2. 			{ 
  3.                  DataGridTextColumn dl = new DataGridTextColumn();
  4.                 dl.Header=‘num‘+i;
  5.               
  6.                 dl.Binding = new Binding("Num" + (i + 1) );
  7.                 dataGrid.Columns.Add(dl);
  8. 			}
  9. 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 

  1.     public class NameList : INotifyPropertyChanged
  2.     {
  3.         public event PropertyChangedEventHandler PropertyChanged;
  4.  
  5.         public NameList(string name, string jOb, string class_, int num, NurseScheduleStatisticsModel model) { Name = name; Class_ = class_; JOb = jOb; Num = num; Ml = model; }
  6.       
  7.   
  8.         private string name;
  9.  
  10.         public string Name
  11.         {
  12.             get { return name; }
  13.             set
  14.             {
  15.                 name = value;
  16.                 if (PropertyChanged != null)
  17.                 {
  18.                     PropertyChanged(this, new PropertyChangedEventArgs("Name"));
  19.                 }
  20.  
  21.             }
  22.         }
  23.         private int num;
  24.  
  25.         public int Num
  26.         {
  27.             get { return num; }
  28.             set
  29.             {
  30.                 num = value;
  31.                 if (PropertyChanged != null)
  32.                 {
  33.                     PropertyChanged(this, new PropertyChangedEventArgs("Num"));
  34.                 }
  35.             }
  36.         }
  37.         private string class_;
  38.  
  39.         public string Class_
  40.         {
  41.             get { return class_; }
  42.             set
  43.             {
  44.                 class_ = value;
  45.                 if (PropertyChanged != null)
  46.                 {
  47.                     PropertyChanged(this, new PropertyChangedEventArgs("Class_"));
  48.                 }
  49.             }
  50.         }
  51.  
  52.  
  53.  
  54.         private string jOb;
  55.  
  56.         public string JOb
  57.         {
  58.             get { return jOb; }
  59.             set
  60.             {
  61.                 jOb = value;
  62.                 if (PropertyChanged != null)
  63.                 {
  64.                     PropertyChanged(this, new PropertyChangedEventArgs("JOb"));
  65.                 }
  66.             }
  67.         }
  68.  
  69.         private NurseScheduleStatisticsModel ml;
  70.  
  71.         public NurseScheduleStatisticsModel Ml
  72.         {
  73.             get { return ml; }
  74.             set { ml = value;
  75.             if (PropertyChanged != null)
  76.             {
  77.                 PropertyChanged(this, new PropertyChangedEventArgs("Ml"));
  78.             }
  79.             }
  80.         }
  81.  
  82.   
  83.  
  84.     }

模拟数据

  1.   private ObservableCollection<NameList> GetNameDataLlist2()
  2.         {
  3.  
  4.             dynamic model = new NurseScheduleStatisticsModel();
  5.  
  6.             model.Num1 = "r1";
  7.             model.Num2 = "R1";
  8.             model.Num3 = "r1";
  9.             model.Num4 = "r1";
  10.             model.Num5 = "T1";
  11.             dynamic model2 = new NurseScheduleStatisticsModel();
  12.  
  13.             model2.Num1 = "r2";
  14.             model2.Num2 = "R2";
  15.             model2.Num3 = "r3";
  16.             model2.Num4 = "r2";
  17.             model2.Num5 = "T2";
  18.             dynamic model3 = new NurseScheduleStatisticsModel();
  19.  
  20.             model3.Num1 = "r2";
  21.             model3.Num2 = "R3";
  22.             model3.Num3 = "r2";
  23.             model3.Num4 = "r3";
  24.             model3.Num5 = "T3";
  25.  
  26.             //modelList.Add(model);
  27.             //modelList.Add(model2);
  28.             //modelList.Add(model3);
  29.  
  30.             listName.Add(new NameList("市川 賞子", "リーダー", "B", 1, model));
  31.             listName.Add(new NameList("石田", "リーダー", "C", 2, model2));
  32.             listName.Add(new NameList("安达 鮎美", "リーダー", "C", 3, model3));
  33.  
  34.             return listName;
  35.  
  36.         }

 

绑定动态列

需要在套一层Ml对象来引用

  1.     for (int i = 0; i < LS.Count; i++)
  2. 			{ 
  3.                  DataGridTextColumn dl = new DataGridTextColumn();
  4.                 dl.Header=LS[i];
  5.               
  6.                 dl.Binding = new Binding("Ml.Num" + (i + 1) );
  7.                 dataGrid.Columns.Add(dl);
  8. 			}

 

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

技术图片

 

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