C＃数据绑定问题 [英] C# data binding question

问题描述

大家好我正在尝试从我制作的US_State类的静态列表中加载一个组合框。列表会在我的WPF窗口中填充所有正确的数据，但如果我放入ComboboxState.ItemsSource = Get_States，我的组合框会加载;在我的窗口代码后面，但我想我可以通过绑定加载组合框。这是我的代码我有

  public   partial   class  ProfileScreen：Window 
 { //  < span class =code-comment>列表填充正确的数据 
  public 列表< US_State> Get_States = StatesArray.Get_States; 
} 
  //   xaml  
< ComboBox x：名称=   ComboboxState Grid.Column =   1 Grid.Row =   2 VerticalAlignment =  中心宽度=   120 Horizo​​ntalAlignment =   Left ToolTip =  输入您的州。 
 ItemsSource =   {Binding Get_States，RelativeSource = {RelativeSource AncestorType = Window，Mode = FindAncestor}，UpdateSourceTrigger = PropertyChanged} 
 DisplayMem berPath =  名称 SelectedValuePath =  缩写 /> 

Us_State中的代码使用Inotify接口和static class只创建一个List< us_state>并加载它。



我尝试过：



数据绑定不要工作，但这适用于codebehind

解决方案

 <   ComboBox     x：名称  =  ComboboxState   网格.Column   =  1    Grid.Row   =  2    VerticalAlignment   = 中心    Widt h   =  120    Horizo​​ntalAlignment   = 左   工具提示  = 输入您的州。  
   
                                    < span class =code-attribute>                   ItemsSource   =  {Binding Get_States} SelectedItem =  {Binding     SimpleStringProperty，   模式  =   TwoWay}   ，    UpdateSourceTrigger   =   PropertyChanged}   
   
                                                       DisplayMemberPath   = 名称    SelectedValuePath   = 缩写  /  >  

试一试，看看它是否有效。如果没有，请告诉我。

 public List< US_State> Get_States = StatesArray.Get_States; 

WPF数据绑定仅适用于属性。你已经声明了一个字段，它不起作用。



如果在Visual Studio中检查输出窗口，你会看到一个数据绑定错误告诉你该物业不存在。



尝试将您的油田更改为物业：

公开列表< US_State> Get_States => StatesArray.Get_States; 

Hello all I’m trying to load a combobox from a static list of a class US_State I made. The list gets populated in my WPF window with all the correct data but my combobox loads if I put ComboboxState.ItemsSource = Get_States; in my window code behind but I thought I could load the combobox by just binding. Here is my code I have

public partial class ProfileScreen : Window
    {	//List populates with correct data
	public List<US_State> Get_States = StatesArray.Get_States;
     }
//xaml
<ComboBox x:Name="ComboboxState" Grid.Column="1" Grid.Row="2" VerticalAlignment="Center" Width="120" HorizontalAlignment="Left" ToolTip="Enter your state."
                          ItemsSource="{Binding Get_States, RelativeSource={RelativeSource AncestorType=Window, Mode=FindAncestor}, UpdateSourceTrigger=PropertyChanged}"
                          DisplayMemberPath="Name" SelectedValuePath="Abbreviation"/>

My code in Us_State uses Inotify interface and static class just creates a List<us_state> and loads it.

What I have tried:

databinding dont work but this works in codebehind

解决方案

<ComboBox x:Name="ComboboxState" Grid.Column="1" Grid.Row="2" VerticalAlignment="Center" Width="120" HorizontalAlignment="Left" ToolTip="Enter your state."

                          ItemsSource="{Binding Get_States} SelectedItem="{Binding SimpleStringProperty, Mode=TwoWay}" , UpdateSourceTrigger=PropertyChanged}"

                          DisplayMemberPath="Name" SelectedValuePath="Abbreviation"/>

Try this and see if it will work. Let me know if did not.

public List<US_State> Get_States = StatesArray.Get_States;

WPF data binding only works with properties. You've declared a field, which won't work.

If you check the output window in Visual Studio, you'll see a data binding error telling you that the property doesn't exist.

Try changing your field to a property:

public List<US_State> Get_States => StatesArray.Get_States;

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