Winforms SplitterPanel，子重叠拆分的z-index [英] Winforms SplitterPanel, z-index of child overlap split

问题描述

我正在使用winforms中的SplitterPanel，在右侧，我需要一个自定义的下拉列表控件，该控件显示2列下拉列表。

I am working with a SplitterPanel in winforms where on the right hand side I want a custom dropdown list control which displays a 2 columns dropdown list.

问题是我希望有两列，所以我希望能够有一个比实际下拉列表更大的下拉列表区域，因此如果列表不适合拆分区域，则覆盖SplitterPanel。

The problem is that with there being two columns I want to be able to have a larger dropdown list area than the actual dropdown, and therefore overlap the SplitterPanel if the list doesn't fit in the split area.

我尝试使用 .BringToFront（）; ，但是这在SplitterPanel上不起作用，并且控件被隐藏。我来自网络背景，在该背景下我会使用z-index，但是我对winforms感到困惑。见下面的问题图片。

I have tried using .BringToFront();, however this does not work on the SplitterPanel and the control is hidden. I come from a web background where I would have used z-index for this but I am stumped with winforms. See below image of my issue.

有人知道我该如何解决吗？

Does anyone know how I can resolve this?

推荐答案

TaW的上述回答帮助我解决了我的问题。对于我将参数移入方法中的情况，我做了一些修改，因为我已经将复选框控件设置为控件的属性，并通过向上移动父级直到到达顶部来获得目标。

TaW's answer above helped my solve my issue. I modified it slightly for my situation where I moved the parameters into the method as I already had my checkbox control set as a property of the control and got the target by looping up the parents until I got to the top.

    private void moveCtlToTarget()
    {
        Control Target = Parent;
        while (Target.Parent != null)
            Target = Target.Parent;

        Point pt = CheckBox.PointToScreen(Point.Empty);
        CheckBox.Location = Target.PointToClient(pt);
        CheckBox.Parent = Target;
        CheckBox.BringToFront();
    }

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