为以编程方式创建的控件创建事件处理程序

Question

我正在研究WPF应用程序，我想要的是如果选择了A组的特定单选按钮，程序会创建第二组单选按钮，将它们称为B组，同时禁用文本框。现在我想创建一个事件，因此如果用户从组B中选择选项3，则文本框将变为启用状态，当取消选择该文本框时，它将再次禁用。现在我以编程方式工作，但是当我尝试创建事件处理程序时，我引用了一个不存在的控件，它将无法构建。我正在尝试使用this.textBox.IsEnabled = true/false;启用/禁用文本框。所以只是为了确保实际的问题是清楚的。如何启用/禁用构建/运行时不存在的文本框？

我的活动：

private void AllowRegion(object sender, RoutedEventArgs e)
        {
            this.SpecRegionText.IsEnabled = true;
        }
private void DisallowRegion(object sender, RoutedEventArgs e)
        {
            this.SpecRegionText.IsEnabled = false;
        }

创建控件：

private void AddSpecificControls()
        {
            Grid grid = (Grid)this.SpecsGrid;
            RadioButton recruitmentEnabled = (RadioButton)this.RecruitmentEnabled;
            if ((bool)recruitmentEnabled.IsChecked)
            {
                RadioButton newNations = new RadioButton();
                newNations.Margin = new Thickness(10, 10, 0, 0);
                newNations.HorizontalAlignment = HorizontalAlignment.Left;
                newNations.Name = "NewNations";
                newNations.GroupName = "RecruitType";
                newNations.Content = "New Nations";
                newNations.Width = 124;
                grid.Children.Add(newNations);
                RadioButton reFound = new RadioButton();
                reFound.Margin = new Thickness(10, 30, 0, 0);
                reFound.HorizontalAlignment = HorizontalAlignment.Left;
                reFound.Name = "Refound";
                reFound.GroupName = "RecruitType";
                reFound.Content = "Refounded Nations";
                reFound.Width = 124;
                grid.Children.Add(reFound);
                RadioButton specRegionRadio = new RadioButton();
                specRegionRadio.Margin = new Thickness(10, 50, 0, 0);
                specRegionRadio.HorizontalAlignment = HorizontalAlignment.Left;
                specRegionRadio.VerticalAlignment = VerticalAlignment.Top;
                specRegionRadio.Name = "SpecRegionRadio";
                specRegionRadio.GroupName = "RecruitType";
                specRegionRadio.Content = "Specific Region";
                specRegionRadio.Width = 124;
                specRegionRadio.Height = 23;
                specRegionRadio.Checked += new RoutedEventHandler(AllowRegion);
                specRegionRadio.Unchecked += new RoutedEventHandler(DisallowRegion);
                grid.Children.Add(specRegionRadio);
                TextBox specRegionText = new TextBox();
                specRegionText.Margin = new Thickness(139, 50, 0, 0);
                specRegionText.HorizontalAlignment = HorizontalAlignment.Left;
                specRegionText.VerticalAlignment = VerticalAlignment.Top;
                specRegionText.Name = "SpecRegionText";
                specRegionText.Text = "Region";
                specRegionText.Width = 120;
                specRegionText.Height = 23;
                specRegionText.IsEnabled = false;
                grid.Children.Add(specRegionText);
            }
        }

Answer 1

您可以使用lambda 挂钩委托内联，但为此您必须在radioButton 之前声明textBox。

TextBox specRegionText = new TextBox();
RadioButton specRegionRadio = new RadioButton();
specRegionRadio.Checked += (s,e) => specRegionText.IsEnabled = true;
specRegionRadio.Unchecked += (s,e) => specRegionText.IsEnabled = false;