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wpf之TreeView綁定

wpf之TreeView綁定

     wpf綁定TreeView,貌似比winForm可能要麻煩一些,不過仔細(xì)分析一下,還是很好解決的,最近做了一個項目,正好寫了一下,下面把代碼貼出來和大家分享一下

先看一個簡單的綁定

 //代碼綁定TreeView2        private void BindTreeView2()        {            TreeViewItem item1 = new TreeViewItem() { Header = "節(jié)點一" };            TreeViewItem item11 = new TreeViewItem() { Header = "節(jié)點1-1" };            item11.Items.Add("aaaa");            item11.Items.Add("bbbb");            item11.Items.Add("cccc");            item11.Items.Add("dddd");            item1.Items.Add(item11);            item1.Items.Add("cccc");            item1.Items.Add("dddd");            TreeViewItem item2 = new TreeViewItem() { Header = "節(jié)點二" };            item2.Items.Add("aaaa");            item2.Items.Add("bbbb");            item2.Items.Add("cccc");            item2.Items.Add("dddd");            treeView2.Items.Add(item1);            treeView2.Items.Add(item2);        }        private void treeView2_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)        {            string dd = treeView2.SelectedItem as string;            MessageBox.Show(dd);        }

然后在看看動態(tài)綁定

首先、需要創(chuàng)建一個節(jié)點類,包括節(jié)點名稱,圖片,內(nèi)容等,另外為了可以增加子節(jié)點,在加一個泛型IList,類型就是節(jié)點類本身

 

/// <summary>
    
/// 節(jié)點類
    
/// </summary>
    internal class PropertyNodeItem
    {
        public string Icon { getset; }
        public string EditIcon { getset; }
        public string DisplayName { getset; }
        public string Name { getset; }
        public int id { getset; }
        public int parentId{get;set;}
        public bool IsExpanded { getset; }
        public List<PropertyNodeItem> Children { getset; }
        public PropertyNodeItem()
        {
            Children = new List<PropertyNodeItem>();
        }
    }

 

然后從數(shù)據(jù)庫中讀取根節(jié)點綁定到treeView中

 

  WebDictClassServices.WebDictClass webDict = new WebDictClass();
        //根節(jié)點添加到treeVIew中
        private void loadTree()
        {
            tvProperties.Items.Clear();//加載根節(jié)點前先清除Treeview控件項
            List<PropertyNodeItem> itemList = new List<PropertyNodeItem>();
            DataTable  dt=webDict.GetArticles();
            DataView dv = dt.DefaultView;
            dv.RowFilter = " ClassType='3' and ParentId=0 ";
            PropertyNodeItem node = new PropertyNodeItem()
            {
                DisplayName = dv[0].Row["title"].ToString(),
                Name = dv[0].Row["title"].ToString(),
                id=Convert.ToInt32(dv[0].Row["id"].ToString()),
                parentId=Convert.ToInt32(dv[0].Row["ParentId"].ToString()),
                IsExpanded=true
                
            };
            int id =Convert.ToInt32(dv[0]["id"].ToString());
            int pid = Convert.ToInt32(dv[0]["ParentId"].ToString());
            ForeachPropertyNode(node, id);
            itemList.Add(node);
            
            this.tvProperties.ItemsSource = itemList;
        }

 

然后,在 ForeachPropertyNode方法中,實現(xiàn)了無限極節(jié)點

 

 //無限接循環(huán)子節(jié)點添加到根節(jié)點下面
        private void ForeachPropertyNode(PropertyNodeItem node,int pid)
        {
            DataTable dtDict = webDict.GetArticles();
            DataView dvDict = dtDict.DefaultView;
            dvDict.RowFilter = " ClassType='3' and ParentId=" + pid;

            if (dvDict.Count > 0)
            {
                foreach (DataRowView view in dvDict)
                {
                    int id = Convert.ToInt32(view["id"].ToString());
                    string name = view["title"].ToString();
                    int parentId = Convert.ToInt32(view["ParentId"].ToString());
                    PropertyNodeItem childNodeItem = new PropertyNodeItem()
                    {
                        DisplayName = name,
                        Name = name,
                        id=id,
                        parentId=parentId,
                        IsExpanded=false
                    };
                    ForeachPropertyNode(childNodeItem, id);
                    node.Children.Add(childNodeItem);
                }
            }
          
        }

如果我們想觸發(fā)點擊節(jié)點事件

 

      //選中節(jié)點事件
        private void tvProperties_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            PropertyNodeItem item = this.tvProperties.SelectedItem as PropertyNodeItem;
            string nodeText= item.Name;

          //  MessageBox.Show(nodeText);
            
        }

 

前臺的xaml文件

 

 <TreeView Height="264" x:Name="tvProperties" Width="220" SelectedItemChanged="tvProperties_SelectedItemChanged">
                <TreeView.ItemContainerStyle>
                    <Style TargetType="{x:Type TreeViewItem}">
                        <Setter Property="IsExpanded" Value="{Binding IsExpanded}"></Setter>
                    </Style>
                </TreeView.ItemContainerStyle>
                    <TreeView.ItemTemplate>
              
                    <HierarchicalDataTemplate  ItemsSource="{Binding Path=Children}">
                        
                        <StackPanel Orientation="Horizontal">
                          
                            <Image VerticalAlignment="Center" Source="{Binding Icon}" Width="16" Height="16" Margin="0,0,2,2"></Image>

                            <TextBlock VerticalAlignment="Center" Name="nodeName" Text="{Binding DisplayName}"></TextBlock>
                          
                            <Image VerticalAlignment="Center" Source="{Binding EditIcon}" Margin="2,0,0,0"></Image>
                          
                            <StackPanel.ToolTip>
                               
                                <TextBlock VerticalAlignment="Center" Text="{Binding Name}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>
                               
                            </StackPanel.ToolTip>
                           
                        </StackPanel>
                      
                    </HierarchicalDataTemplate>
                
                </TreeView.ItemTemplate>
            </TreeView>

 可以發(fā)現(xiàn),我們綁定的節(jié)點是類型的,到時候都可以轉(zhuǎn)化過去,從而取得相關(guān)的值

多思考,多創(chuàng)新,才是正道!
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