C# 从WPF中的TreeView获取TreeView项
使用C# 从WPF中的TreeView获取TreeView项,c#,.net,wpf,treeview,C#,.net,Wpf,Treeview,使用hierarchycaldatatemplate从TreeView获取treevieItem时遇到问题。我想按值搜索一个项目，并将IsExpanded设置为True，然后选择它 我正在Visual Studio 2015和Windows 10中使用C#WPF XAML代码： <TreeView x:Name="TreeOres" SelectedItemChanged="TreeOres_SelectedItemChanged" Background="#f9f9f9" MinWid
hierarchycaldatatemplateTreeViewtreevieItem<TreeView x:Name="TreeOres" SelectedItemChanged="TreeOres_SelectedItemChanged" Background="#f9f9f9" MinWidth="350" Width="auto" DockPanel.Dock="Left" ItemsSource="{Binding}">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate DataType="local:Ores" ItemsSource="{Binding Path=resParent_Code_FK}">
<DockPanel LastChildFill="True" HorizontalAlignment="Stretch" Width="auto" Margin="0,5,0,5">
<Label Width="30" Height="30" DockPanel.Dock="Left" Uid="{Binding Path=Ores_ParentCode_FK}" Template="{StaticResource ImageTemp}"/>
<Label Content="{Binding Path=Ores_Name}" Width="250" DockPanel.Dock="Left"/>
<DockPanel.ContextMenu>
<ContextMenu>
<MenuItem Header="اضافة مجلد جديد + " x:Name="AddGroup" Click="AddGroup_Click" Uid="{Binding Path=Ores_Code}" />
<MenuItem Header="اضافة صنف جديد + " x:Name="AddItem" Click="AddItem_Click" Uid="{Binding Path=Ores_Code}" />
</ContextMenu>
</DockPanel.ContextMenu>
</DockPanel>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
<TreeView.Resources>
<LinearGradientBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFD9F4FF" Offset="0"/>
<GradientStop Color="#FF9BDDFB" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="{x:Static SystemColors.ControlBrushKey}" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFEEEDED" Offset="0"/>
<GradientStop Color="#FFDDDDDD" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}" Color="Black" />
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
<Setter Property="IsExpanded" Value="True" />
</Style>
</TreeView.Resources>
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="BorderThickness" Value="1.5"/>
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="BorderBrush" Value="#adc6e5"/>
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="FontWeight" Value="Bold" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="True"/>
<Condition Property="IsSelectionActive" Value="False"/>
</MultiTrigger.Conditions>
<Setter Property="BorderBrush" Value="LightGray"/>
</MultiTrigger>
</Style.Triggers>
<Style.Resources>
<Style TargetType="Border">
<Setter Property="CornerRadius" Value="1"/>
</Style>
</Style.Resources>
</Style>
</TreeView.ItemContainerStyle>
</TreeView>
类ClassTreeView
{
///
///按某个值在treeview中搜索
///
///
///
///
/// ///
///
公共字符串筛选器字符串{get；set；}
公共字符串筛选器列{get；set；}
公共字符串筛选器ColumnText{get；set；}
公共对象结果{get；set；}
公共数据表mtable{get；set；}
public void SelectNodeById（树视图树）
{
对于（int i=0；i public void SelectNodeById(TreeView Tree)
{
var item = findItemById(Tree, "uid");
}
private static object findItemById(TreeView Tree, string uid)
{
foreach (var item in Tree.Items)
{
//every item in your tree is a dockpanel
var d = item as DockPanel;
//the first item has a uid
if (d.Children.Count > 0 && d.Children[0].Uid == uid)
return item;
}
return null;
}
IsExpandedTreeViewItemvar item = new TreeViewItem();
item.IsExpanded = true;
item.IsSelected = true;
这是完整的类代码。您可以使用此代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Data;
using System.Windows.Media;
using System.Windows;
public string FilterString { get; set; } // Value searching
public string FilterColumn { get; set; } // column name
public string FilterColumnText { get; set; } // by this variable will display text
System.Windows.Threading.DispatcherTimer tmr = new System.Windows.Threading.DispatcherTimer(); // by this timer will search about an item becouse for going to next item we need to stop sometime
private int count = 0;
private int i = 0;
// will call to this method and adding treeview control to search about item
public void FindNode(TreeView tree = null)
{
tmr.Interval = new TimeSpan(0, 0, 0, 0, 1);
// will add count of objects
count = FindVisualChildren<DependencyObject>(tree).ToList().Count;
tmr.Tick += (s, e) =>
{
if (i < count)
{
if (FindVisualChildren<Grid>(tree).ToList()[i] != null)
{
Grid node = FindVisualChildren<Grid>(tree).ToList()[i];
if (SelectNode(node))
{
// if we found the item will stoping the timer
i = 0;
count = 0;
tmr.Stop();
}
}
i += 1;
}
// will add new count to the variable after expand the items
count = FindVisualChildren<Grid>(tree).ToList().Count;
};
tmr.Start();
}
// Search for an item
bool SelectNode(DependencyObject node)
{
bool fo = false;
for (int i = 0; i < (node as Grid).Children.Count; i++)
{
object obj = (node as Grid).Children[i];
if (obj.GetType() == typeof(Border))
{
TreeViewItem item = ((obj as Border).TemplatedParent as TreeViewItem);
if (item != null && item is TreeViewItem)
{
if (item.Items.Count > 0)
{
item.IsExpanded = true;
}
var row = item.Header as DataRowView;
if (row[FilterColumn].ToString() == FilterString)
{
item.IsSelected = true;
BindParent(item);
fo = true;
break;
}
items.Add(item);
}
}
}
return fo;
}
public IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
if (depObj != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
yield return (T)child;
foreach (T childOfChild in FindVisualChildren<T>(child))
yield return childOfChild;
}
}
}
使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用System.Threading.Tasks；
使用System.Windows.Controls；
使用系统数据；
使用System.Windows.Media；
使用System.Windows；
公共字符串筛选器字符串{get；set；}//值搜索
公共字符串过滤器column{get；set；}//列名
公共字符串过滤器ColumnText{get；set；}///由此变量将显示文本
System.Windows.Threading.dispatchermer tmr=新系统.Windows.Threading.dispatchermer（）；//通过此计时器，我们将搜索一个项目，因为我们需要在某个时间停止下一个项目
私有整数计数=0；
私有整数i=0；
//将调用此方法并添加treeview控件以搜索关于项目
public void FindNode（TreeView tree=null）
{
tmr.Interval=新的时间跨度（0,0,0,0,1）；
//将添加对象的计数
count=FindVisualChildren（tree）.ToList（）.count；
tmr.勾选+=（s，e）=>
{
如果（i0）
{
item.IsExpanded=true；
}
var row=项目。标题为DataRowView；
if（行[FilterColumn].ToString（）==FilterString）
{
item.IsSelected=true；
家长（项目）；
fo=真；
布雷
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Data;
using System.Windows.Media;
using System.Windows;
public string FilterString { get; set; } // Value searching
public string FilterColumn { get; set; } // column name
public string FilterColumnText { get; set; } // by this variable will display text
System.Windows.Threading.DispatcherTimer tmr = new System.Windows.Threading.DispatcherTimer(); // by this timer will search about an item becouse for going to next item we need to stop sometime
private int count = 0;
private int i = 0;
// will call to this method and adding treeview control to search about item
public void FindNode(TreeView tree = null)
{
tmr.Interval = new TimeSpan(0, 0, 0, 0, 1);
// will add count of objects
count = FindVisualChildren<DependencyObject>(tree).ToList().Count;
tmr.Tick += (s, e) =>
{
if (i < count)
{
if (FindVisualChildren<Grid>(tree).ToList()[i] != null)
{
Grid node = FindVisualChildren<Grid>(tree).ToList()[i];
if (SelectNode(node))
{
// if we found the item will stoping the timer
i = 0;
count = 0;
tmr.Stop();
}
}
i += 1;
}
// will add new count to the variable after expand the items
count = FindVisualChildren<Grid>(tree).ToList().Count;
};
tmr.Start();
}
// Search for an item
bool SelectNode(DependencyObject node)
{
bool fo = false;
for (int i = 0; i < (node as Grid).Children.Count; i++)
{
object obj = (node as Grid).Children[i];
if (obj.GetType() == typeof(Border))
{
TreeViewItem item = ((obj as Border).TemplatedParent as TreeViewItem);
if (item != null && item is TreeViewItem)
{
if (item.Items.Count > 0)
{
item.IsExpanded = true;
}
var row = item.Header as DataRowView;
if (row[FilterColumn].ToString() == FilterString)
{
item.IsSelected = true;
BindParent(item);
fo = true;
break;
}
items.Add(item);
}
}
}
return fo;
}
public IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
if (depObj != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
yield return (T)child;
foreach (T childOfChild in FindVisualChildren<T>(child))
yield return childOfChild;
}
}
}