如何设置为一个TreeView一些但不是所有节点的图像？ [英] How do I set an image for some but not all nodes in a TreeView?

问题描述

我有一个的TreeView Windows窗体控件与的ImageList ，我想一些显示图像的节点的，但其他人没有图像。

I have a TreeView windows forms control with an ImageList, and I want some of the nodes to display images, but the others to not have images.

我的不的希望有一个空格所在的形象应该是。我的没有的希望看起来像树视图将借鉴如果没有一个ImageList线的图像。我如何得到它绘制图像的一些项目，而不是别人，而不诉诸笨拙黑客这样？

I don't want a blank space where the image should be. I don't want an image that looks like the lines that the TreeView would draw if it didn't have an ImageList. How do I get it to draw images for some items and not others, without resorting to clumsy hacks like that?

推荐答案

我想这一次，我不认为这是可能的。

I tried this once and I don't think it is possible.

如果您尝试设置两个 ImageKey 和的ImageIndex 来未设置值的控制只是默认值的ImageIndex 0以下code：

If you try to set both ImageKey and ImageIndex to "not set" values the control just defaults ImageIndex to 0. The following code:

treeView.ImageKey = "Value";
Debug.WriteLine(treeView.ImageIndex);
treeView.ImageKey = null;
Debug.WriteLine(treeView.ImageIndex);
treeView.ImageIndex = -1;
Debug.WriteLine(treeView.ImageIndex);

生成输出：

-1
0
0

这样的告诉你，控制开发商要确保总有一个默认的图像。这只是给你留下了黑客的选择，我很害怕。

This kind of tells you that the control developers wanted to make sure that there was always a default image. That just leaves you with the hack options I'm afraid.

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