获得所选RadioButton的指数在一组 [英] Getting the index of the selected RadioButton in a group

问题描述

我有一个单选按钮RB1。结果
我怎样才能获得所选择的单选按钮的索引RB1的组的参考？结果
我用Google搜索了一会儿，但没有成功

I have got a reference to a RadioButton rb1.
How can I get the index of the selected RadioButton in rb1's group ?
I have googled for a while but without success.

任何帮助将不胜感激。

推荐答案

如果你有，这点则有可能出错了你的设计，你应该重新考虑它

If you got to this point then there is probably something wrong with your design and you should reconsider it.

这是说，你可以遍历可视化树，并发现它是这样的：

that being said you could traverse the visual tree and find it like this:

        /// Returns the first GroupBox ancester            
        public DependencyObject  FindAncestor(DependencyObject current)

        {
            current = VisualTreeHelper.GetParent(current);

            while (current != null)
            {
                if (current is GroupBox)
                {
                    return (T)current;
                }
                current = VisualTreeHelper.GetParent(current);
            };
            return null;
        }

然后再在儿童和发现检查单选按钮

then go over the children and find the checked radioButton

    public RadioButton FindChild<T>(DependencyObject parent)       
    {
        // Confirm parent and childName are valid.
        if (parent == null) return null;

        RadioButton foundChild = null;

        int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < childrenCount; i++)
        {
            var child = VisualTreeHelper.GetChild(parent, i);
            // If the child is not of the request child type child
            var childType = child as radioButton;
            if (childType == null)
            {
                // recursively drill down the tree
                foundChild = FindChild(child);

                // If the child is found, break so we do not overwrite the found child.
                if (foundChild != null) return foundChild ;
            }
            else if (childName.IsChecked == true)
            {
               return foundChild;  
            }
        }

        return null;
    }

这篇关于获得所选RadioButton的指数在一组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！