c# WPF 如何调用或调用按钮 function 使用字符串变量，字符串变量包含按钮名称？

Question

string buttonName="";  
private void _1btn_Click(object sender, RoutedEventArgs e){
    var button = (Button) sender; 
    buttonName = button.Name;
    ChangeButtonColour();
} 

private void ChangeButtonColour() {
    buttonName.Background = Brushes.Red;// doesn't Work!
}

我尝试使用字符串变量buttonName（其中包含“_1btn”）调用按钮function，而不是调用实际按钮名称的_1btn。

Answer 1

    //find the control by from form element tree
    private void ChangeButtonColour(string _btname)
    {
        Button foundTextBox = FindChild<Button>(Application.Current.MainWindow, _btname);
    }

    public static T FindChild<T>(DependencyObject parent, string childName)where T : DependencyObject
    {
        // Confirm parent and childName are valid. 
        if (parent == null) return null;

        T 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
            T childType = child as T;
            if (childType == null)
            {
                // recursively drill down the tree
                foundChild = FindChild<T>(child, childName);

                // If the child is found, break so we do not overwrite the found child. 
                if (foundChild != null) break;
            }
            else if (!string.IsNullOrEmpty(childName))
            {
                var frameworkElement = child as FrameworkElement;
                // If the child's name is set for search
                if (frameworkElement != null && frameworkElement.Name == childName)
                {
                    // if the child's name is of the request name
                    foundChild = (T)child;
                    break;
                }
            }
            else
            {
                // child element found.
                foundChild = (T)child;
                break;
            }
        }

        return foundChild;
    }

Answer 2

我找到了答案。 您不能将按钮属性存储在字符串变量中。 因此，您创建了一个按钮 object 类型变量，然后将按钮分配给新的按钮类型变量，然后您可以调用按钮属性。

Button buttonName="";  

private void _1btn_Click(object sender, RoutedEventArgs e){    
buttonName = _1btn;
ChangeButtonColour();
} 

private void ChangeButtonColour() {
buttonName.Background = Brushes.Red;// This works!
}