TreeView添加图片

实现方式一：

通过代码方式实现如下所示：

   private string FilePath = Application.StartupPath + "\\Images\\";

            Image img = new Bitmap(FilePath + "one.ico");

            Image img1 = new Bitmap(FilePath + "two.ico");

            ImageList imgs = new ImageList();

            imgs.Images.Add(img);

            imgs.Images.Add(img1);

            this.tvTest.ImageList = imgs;

            TreeNode node = new TreeNode();

            node.Text = "Root";

            this.tvTest.Nodes.Add(node);

            node.ImageIndex = 0;

            node.SelectedImageIndex = 0;

            TreeNode node1 = new TreeNode();

            node1.Text = "root001";

            TreeNode node2 = new TreeNode();

            node2.Text = "root002";

            node.Nodes.Add(node1);

            node.Nodes.Add(node2);

            this.tvTest.ExpandAll();

            node1.ImageIndex =1;

            node1.SelectedImageIndex = 1;

            node2.ImageIndex = 1;

            node2.SelectedImageIndex = 1;

实现方式二：

通过绑定ImageList控件实现，如下所示：

操作步骤：第一步，工具箱中拖动ImageList控件；第二步，ImageList控件Images属性添加图片集合；第三步，TreeView控件绑定ImageList属性；

第四步，代码如下所示：

            TreeNode node = new TreeNode();

            node.Text = "Root";

            this.tvTest.Nodes.Add(node);

            node.ImageIndex = 0;

            node.SelectedImageIndex = 0;

            TreeNode node1 = new TreeNode();

            node1.Text = "root001";

            TreeNode node2 = new TreeNode();

            node2.Text = "root002";

            node.Nodes.Add(node1);

            node.Nodes.Add(node2);

            this.tvTest.ExpandAll();

            node1.ImageIndex =1;

            node1.SelectedImageIndex = 1;

            node2.ImageIndex = 1;

            node2.SelectedImageIndex = 1;

运行效果如下：