C# 如何删除 switch 中动态创建的控件

Question

好的，所以在我的 switch(comboBox1.SelectedIndex) 中 case 1 它会动态创建一些标签和组合框并添加它们到 tabPage1，但我希望在选择 case 2

时删除那些动态创建的控件

public void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (comboBox2.SelectedIndex)
            {
                case 0:
                    {
                        //do nothing.
                        break;
                    }
                case 1:
                    {
                        Label label16 = new Label();
                        tabPage1.Controls.Add(label16);
                        label16.Left = 465;
                        label16.Top = 111;
                        label16.Text = "Time:";
                        label16.Size = new Size(60, 13);

                        ComboBox comboBox13 = new ComboBox();
                        tabPage1.Controls.Add(comboBox13);
                        comboBox13.Left = 533;
                        comboBox13.Top = 108;
                        comboBox13.Size = new Size(104, 21);
                        comboBox13.DropDownStyle = ComboBoxStyle.DropDownList;

                        comboBox13.DisplayMember = "Text";
                        comboBox13.ValueMember = "Value";
                        var ComboBox13Items = new[] { 
                        new { Text = "1 Second", Value = "1" }, 
                        new { Text = "2.5 Seconds", Value = "2.5" }, 
                        new { Text = "5 Seconds", Value = "5" },
                        new { Text = "7.5 Seconds", Value = "7.5" },
                        new { Text = "10 Seconds", Value = "10" }
                        };
                        comboBox13.DataSource = ComboBox13Items;
                        break;
                    }
                case 2:
                    {
                        foreach (Control TimeLabel in tabPage1.Controls.OfType<Controls>())
                        {
                            if (TimeLabel.Name == "label16")
                                tabPage1.Controls.Remove(TimeLabel);
                        }

                        foreach (Control TimeComboBox in tabPage1.Controls.OfType<Controls>())
                        {
                            if (TimeComboBox.Name == "comboBox13")
                                tabPage1.Controls.Remove(TimeComboBox);
                        }

                        break;
                    }

我也尝试将 OfType<Controls> 更改为 OfType<Label> 和 OfType<ComboBox>，仍然没有成功：/

Answer 1

Label label16 = new Label();
                        tabPage1.Controls.Add(label16);
                        label16.Left = 465;
                        label16.Top = 111;
                        label16.Text = "Time:";
                        label16.Size = new Size(60, 13);

不创建名为 "label16" 的按钮，而是创建一个未命名的按钮。

您需要添加

labal16.Name = "label16";

名称应该是唯一的，如果有可能添加不止一组，请保留一个计数器或其他东西，并使用计数器来制作一个唯一的名称。

C# 如何删除 switch 中动态创建的控件

C# How to remove dynamically created controls in switch

c#

controls

dynamic-controls

switch-statement