C# 如何在运行时c中清除窗体控件#

我正在设计一个Windows窗体，以便在运行时创建子窗体。我希望子窗体根据在父窗体中输入的文本生成控件（按钮、列表框等）。我的问题是，当我关闭子窗体，输入新文本并重新启动子窗体时，会创建相同的控件

这是我如何称呼子窗体的：

private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                Form2 frm2 = new Form2();

                frm2.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

这是子窗体中的代码

try
            {
                this.MaximizeBox = false;
                this.MinimizeBox = false;
                this.BackColor = Color.White;
                this.ForeColor = Color.Black;
                this.Size = new System.Drawing.Size(550, 550);
                this.Text = "Test Create form in run time ";
               Form1 frm1 = new Form1();
               if (frm1.master == "button")
                  {
                    this.btnAdd.BackColor = Color.Gray;
                    this.btnAdd.Text = "Add";
                    this.btnAdd.Location = new System.Drawing.Point(90, 25);
                    this.btnAdd.Size = new System.Drawing.Size(50, 25);
                    this.Controls.Add(btn);
                }
}

有人能给我一段代码或链接吗？

希望这能对您有所帮助

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
  Utilities.ResetAllControls(this);
}

public class Utilities
    {
        public static void ResetAllControls(Control form)
        {
            foreach (Control control in form.Controls)
            {
                if (control is TextBox)
                {
                    TextBox textBox = (TextBox)control;
                    textBox.Text = null;
                }

                if (control is ComboBox)
                {
                    ComboBox comboBox = (ComboBox)control;
                    if (comboBox.Items.Count > 0)
                        comboBox.SelectedIndex = 0;
                }

                if (control is CheckBox)
                {
                    CheckBox checkBox = (CheckBox)control;
                    checkBox.Checked = false;
                }

                if (control is ListBox)
                {
                    ListBox listBox = (ListBox)control;
                    listBox.ClearSelected();
                }
            }
        }      
    }

试试这个

    foreach(control in this.Controls)
    {
        this.Controls.Remove(control);
        control.Dispose();
    }
    this.Controls.Clear();

---

问题在于，您不是从From1发送文本，而是在Form2中创建新的Form1。这不是你想要的我猜

要解决这个问题：

在Form2中添加一个名为say'ControlText'的字符串属性

假设用户将文本写入名为Text1的文本框中 表格1

然后，您将从Form1调用form2，如下所示：

private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                Form2 frm2 = new Form2();
                frm2.ControlText = Text1.text
                frm2.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

try
            {
                this.MaximizeBox = false;
                this.MinimizeBox = false;
                this.BackColor = Color.White;
                this.ForeColor = Color.Black;
                this.Size = new System.Drawing.Size(550, 550);
                this.Text = "Test Create form in run time ";
               if (ControlText == "button")
                  {
                    this.btnAdd.BackColor = Color.Gray;
                    this.btnAdd.Text = "Add";
                    this.btnAdd.Location = new System.Drawing.Point(90, 25);
                    this.btnAdd.Size = new System.Drawing.Size(50, 25);
                    this.Controls.Add(btn);
                }
}

最后，表单2中的代码如下所示：

private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                Form2 frm2 = new Form2();
                frm2.ControlText = Text1.text
                frm2.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

try
            {
                this.MaximizeBox = false;
                this.MinimizeBox = false;
                this.BackColor = Color.White;
                this.ForeColor = Color.Black;
                this.Size = new System.Drawing.Size(550, 550);
                this.Text = "Test Create form in run time ";
               if (ControlText == "button")
                  {
                    this.btnAdd.BackColor = Color.Gray;
                    this.btnAdd.Text = "Add";
                    this.btnAdd.Location = new System.Drawing.Point(90, 25);
                    this.btnAdd.Size = new System.Drawing.Size(50, 25);
                    this.Controls.Add(btn);
                }
}

---

添加您的代码，可能您没有销毁旧窗口。在form2的OnClose中，在具有文本的控件中创建如下内容：text.text=”“您是否从中绑定表单控件和对象结构的数据？这不会“销毁”窗口。把它关上。制作如下

form2.Dispose（）

form2=new Form（）

请输入您的代码，这样我就可以清楚地了解问题所在