如何将字符串ObservableCollection绑定到wpf DataGridTemplateColumn中的combobox。 [英] How to bind a string ObservableCollection to combobox in wpf DataGridTemplateColumn.

问题描述

大家好，



我无法弄清楚我做错了什么。我的模型中有以下代码。

  private  ObservableCollection< string> _metadataFieldList =  new  ObservableCollection< string>（）; 
  public  ObservableCollection< string> MetadaFieldList 
 {
  get  { return  _metadataFieldList; } 
  set  
 {
 _metadataFieldList =  value ; 
} 
} 

视图模型中的以下代码

列表< string> ; lst =  new  DirectoryInfo（fullFolderPath）.GetDirectories（  * ，SearchOption.AllDirectories）
 .Select（x = >  x.FullName）。ToList（）; 
 
 model.MetadaFieldList =  new  ObservableCollection< string>（lst）; 

和我的xaml标记中的以下内容。

 <   DataGridTemplateColumn    宽度  = 自动 >  
 <   DataGridTemplateColumn.CellTemplate  >  
 <   DataTemplate  >  
 <   ComboBox     SelectedValue   =  {Binding Path = FieldName，Mode = TwoWay，UpdateSourceTrigger = PropertyChanged}  
   
                                                < span class =code-attribute>                   ItemsSource   =  {Binding Path = MetadaFieldList} >  
 <   / ComboBox  >  
 < span class =code-keyword><   / DataTemplate  >  
 <   / DataGridTemplateColumn.CellTemplate  >  
 <   / DataGridTemplateColumn  >  

组合框始终为空，且ItemsSource为空。



提前感谢您的帮助。



Zafar

解决方案

必须按如下方式更改ItemSource

< pre lang =xml> ItemsSource ={Binding DataContext.TaxonomyList，Mode = TwoWay，
RelativeSource = {RelativeSource FindAncestor，AncestorType = {x：Type Window}}，UpdateSourceTrigger = PropertyChanged}

Hi All,

I am unable to figure out what I am doing wrong. i have the following code in my model.

private ObservableCollection<string> _metadataFieldList = new ObservableCollection<string>();
        public ObservableCollection<string> MetadaFieldList
        {
            get { return _metadataFieldList; }
            set
            {
                _metadataFieldList = value;
            }
        }

The following code in the viewmodel

List<string> lst = new DirectoryInfo(fullFolderPath).GetDirectories("*", SearchOption.AllDirectories)
                .Select(x => x.FullName).ToList();

            model.MetadaFieldList = new ObservableCollection<string>(lst);

and the following in my xaml markup.

<DataGridTemplateColumn Width="Auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox SelectedValue="{Binding Path=FieldName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

                                ItemsSource="{Binding Path=MetadaFieldList}">
                            </ComboBox>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

The combobox is always empty and and the ItemsSource is null.

Thanks in advance for any help.

Zafar

解决方案

Had to Change the ItemSource as follows

ItemsSource="{Binding DataContext.TaxonomyList, Mode=TwoWay, 
           RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, UpdateSourceTrigger=PropertyChanged}"

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