c# – 向TreeViewItem添加图标

发布时间：2020-12-16 00:06:07 所属栏目：百科来源：网络整理

导读：我被要求更新一个在类对象中动态构建的 WPF应用程序中的TreeVeiw.正如您将看到treeveiw没有任何约束.以下不是我的代码!! TreeView Grid.Row =“0”Horizo??ntalAlignment =“Stretch”Name =“tvLocations”VerticalAlignment =“Stretch”SelectedItemChang

我被要求更新一个在类对象中动态构建的 WPF应用程序中的TreeVeiw.正如您将看到treeveiw没有任何约束.以下不是我的代码!!

< TreeView Grid.Row =“0”Horizo??ntalAlignment =“Stretch”Name =“tvLocations”VerticalAlignment =“Stretch”SelectedItemChanged =“tvLocations_SelectedItemChanged”/>

private void BuildTreeVeiw(Location locationList)
    {
        this.Title = _selectedLoc.Name +  " - Locations";
        tvLocations.Items.Clear();

        TreeViewItem tvitem;

        tvitem = new TreeViewItem() { Header = locationList.Name,Uid = locationList.Id.ToString() };

        if (locationList.Printers != null)
        {
            TreeViewItem tvprnitem = new TreeViewItem() { Header = "Printers" };
            tvprnitem.FontWeight = FontWeights.Regular;

            foreach (Printer sprinters in locationList.Printers)
            {
                TreeViewItem psubitem = new TreeViewItem() { Header = sprinters.Name,Uid = sprinters.Id.ToString() };
                TreeViewItem psubitem1 = new TreeViewItem() { Header = String.Concat("UNC: ",sprinters.UNC) };
                psubitem.Items.Add(psubitem1);
                tvprnitem.Items.Add(psubitem);
            }
            tvitem.Items.Add(tvprnitem);
        }

        foreach (Location loc in locationList.Children)
        {
            AddChildren(loc,ref tvitem);
        }
        tvLocations.Items.Add(tvitem);
    }

    private void AddChildren(Location child,ref TreeViewItem tvi)
    {
        TreeViewItem tvitem;

        tvitem = new TreeViewItem() { Header = child.Name,Uid = child.Id.ToString() };
        if (child.Name ==  _currentLocation.Name)
        {
            tvitem.FontWeight = FontWeights.Bold;
        }

        if (child.Printers != null)
        {
            TreeViewItem tvprnitem = new TreeViewItem() { Header = "Printers" };
            tvprnitem.FontWeight = FontWeights.Regular;

            foreach (Printer sprinters in child.Printers)
            {
                TreeViewItem psubitem = new TreeViewItem() { Header = sprinters.Name,sprinters.UNC) };
                psubitem.Items.Add(psubitem1);
                tvprnitem.Items.Add(psubitem);
            }
            tvitem.Items.Add(tvprnitem);
        }
        if (child.Children != null)
        {
            foreach (Location loc in child.Children)
            {
                AddChildren(loc,ref tvitem);
            }
        }

        tvi.Items.Add(tvitem);

    }

这正确地构建了树,我被要求做的就是向TreeViewItem添加一个图标.根据位置或该位置内的打印机,图标将有所不同.

我看不到如何向TreeViewItems添加图标,任何人都可以指向正确的方向吗？

解决方法

我通过改变这一行来解决这个问题

tvitem = new TreeViewItem() { Header = child.Name,Uid = child.Id.ToString() };

至

tvitem = GetTreeView(child.Id.ToString(),child.Name,"location.png");

添加此功能

private TreeViewItem GetTreeView(string uid,string text,string imagePath)
    {
        TreeViewItem item = new TreeViewItem();
        item.Uid = uid;
        item.IsExpanded = false;

        // create stack panel
        StackPanel stack = new StackPanel();
        stack.Orientation = Orientation.Horizontal;

        // create Image
        Image image = new Image();
        image.Source = new BitmapImage
            (new Uri("pack://application:,/Images/" + imagePath));
        image.Width = 16;
        image.Height = 16;
        // Label
        Label lbl = new Label();
        lbl.Content = text;


        // Add into stack
        stack.Children.Add(image);
        stack.Children.Add(lbl);

        // assign stack to header
        item.Header = stack;
        return item;
    }

工作得很完美.

（编辑：李大同）

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