我正在使用TreeView来显示我的数据。我想绑定(bind)树 View 项目的前景。这是下面的代码。
看法:
<UserControl.Resources>
<HierarchicalDataTemplate x:Key="TreeViewItem" ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal">
<CheckBox Margin="2" IsChecked="{Binding IsChecked, Mode=TwoWay}" Content="{Binding Title}"
Background="{Binding Path=ForegroundColor}" IsThreeState="True"/>
</StackPanel>
</HierarchicalDataTemplate>
</UserControl.Resources>
<Grid>
<TreeView Margin="5, 0, 5, 0" ItemsSource="{Binding GeoGraphixModules}" ItemTemplate="{StaticResource TreeViewItem}" IsEnabled="{Binding TreeViewEnabled}" />
</Grid>
在我看来
公共(public)类SomeTreeViewItem
{
公共(public)收集 child
{
得到{return _children; }
}
public Brush ForegroundColor
{
get
{
if (SomeCheck)
return Brushes.Green;
else
return Brushes.Red;
}
}
}
现在,当我调试该应用程序时,“ForegroundColor”被击中,但该应用程序仍将黑色显示为所有子项的前景。这里有什么问题?
最佳答案
在尝试创建相同的错误后,我做了以下viewmodel
public class ViewModel
{
private Collection<GeoGraphixModule> _geoGraphixModules;
public ViewModel()
{
_geoGraphixModules = new Collection<GeoGraphixModule>();
_geoGraphixModules.Add(new GeoGraphixModule(){Children = new Collection<Bla>(){new Bla{Children = new Collection<Bla>{new Bla(), new Bla(), new Bla()}}}});
_geoGraphixModules.Add(new GeoGraphixModule(){Children = new Collection<Bla>(){new Bla{Children = new Collection<Bla>{new Bla(), new Bla(), new Bla()}}}});
_geoGraphixModules.Add(new GeoGraphixModule(){Children = new Collection<Bla>(){new Bla{Children = new Collection<Bla>{new Bla(), new Bla(), new Bla()}}}});
_geoGraphixModules.Add(new GeoGraphixModule(){Children = new Collection<Bla>(){new Bla{Children = new Collection<Bla>{new Bla(), new Bla(), new Bla()}}}});
}
public Collection<GeoGraphixModule> GeoGraphixModules
{
get { return _geoGraphixModules; }
set { _geoGraphixModules = value; }
}
}
public class GeoGraphixModule
{
public Brush ForegroundColor
{
get
{
if (SomeCheck())
return Brushes.Green;
return Brushes.Red;
}
}
private bool SomeCheck()
{
Random random = new Random();
int randomNumber = random.Next(0, 100);
if ((randomNumber % 2) == 0)
return true;
return false;
}
private Collection<Bla> _children;
public Collection<Bla> Children { get; set; }
}
public class Bla
{
private bool? _isChecked;
private string _title;
private Collection<Bla> _children;
public bool? IsChecked
{
get { return _isChecked; }
set
{
_isChecked = value;
}
}
public Collection<Bla> Children
{
get { return _children; }
set { _children = value; }
}
public string Title
{
get { return _title; }
set
{
_title = value;
}
}
}
我知道它非常丑陋,但适用于顶级,请在下面的图片中进行掠夺
关于c# - TreeView项目前景绑定(bind)MVVM,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/18691824/