从动态界面中删除控制[关闭]

Question

我正在做一个 c# 练习项目，以提高我的技能并学习新事物。我创建了一个由几个控件组成的动态界面。当加载表单时，它以 numericUpDown 和 Button 启动。当用户在 numeric up down 上选择一个数字并单击按钮时，它将根据在 numericUpDown 上选择的数字生成尽可能多的文本框，它还会在生成的文本框旁边生成一个删除按钮。当用户单击删除按钮时，我无法删除文本框

这是我拥有的代码：

// 生成文本框和按钮

private void AssessmentButton_Click(object sender, EventArgs e)
{
  int length = (int)this.NoAssesmentBoxlv4.Value;
  for (int i = 0; i < length; i++)
  {
    textboxAssesmentName.Add(new TextBox());
    var p = new System.Drawing.Point(110, 260 + i * 25);                     
    (textboxAssesmentName[i] as TextBox).Location = p;
    (textboxAssesmentName[i] as TextBox).Size = new System.Drawing.Size(183, 20);
    this.Lv4Tab.Controls.Add(textboxAssesmentName[i] as TextBox);
    buttoRemove.Add(new Button());
    (buttoRemove[i] as Button).Location = new System.Drawing.Point(380, 260 + i * 25);
    (buttoRemove[i] as Button).Text = @"x";
    (buttoRemove[i] as Button).BackColor = Color.Red;
    (buttoRemove[i] as Button).ForeColor = Color.White;
    (buttoRemove[i] as Button).Size = new System.Drawing.Size(22, 23);
    this.Lv4Tab.Controls.Add(buttoRemove[i] as Button);

    (buttoRemove[i] as Button).Click += this.buttoRemove_click;
  }
}

这里是删除按钮点击的来源：（这个方法不编译）

private void buttoRemove_click(object sender, EventArgs e)
{
  foreach (Object obj in textboxAssesmentName)
  {
    // THIS LINE DOES NOT COMPILE!!!
    this.Controls.Remove(textboxAssesmentName.Remove);
  }
}

任何想法将不胜感激

Answer 1

试试类似的东西

foreach (var control in textboxAssesmentName)
{
    this.Controls.Remove(control);
}

您现有的代码没有任何意义。

另请参阅
http://msdn.microsoft.com/en-us/library/82785s1h%28v=vs.80%29.aspx

Answer 2

我建议你使用Button 的Tag 属性来存储与之关联的TextBox。要将其放入您的代码中，请将此行插入您的循环中：

(buttoRemove[i] as Control).Tag = textboxAssesmentName[i];

那么您的事件处理程序将如下所示：

private void buttoRemove_click(object sender, EventArgs e)
{
    this.Controls.Remove((sender as Control).Tag as Control);
}

编辑：这是我编写代码的方式（不包括拼写错误）。

private void AssessmentButton_Click(object sender, EventArgs e)
{
    int length = (int)this.NoAssesmentBoxlv4.Value;
    for (int i = 0; i < length; i++)
    {
        TextBox t = new TextBox();
        System.Drawing.Point p = new System.Drawing.Point(110, 260 + i * 25);                     
        t.Location = p;
        t.Size = new System.Drawing.Size(183, 20);

        Button b = new Button();
        b.Location = new System.Drawing.Point(380, 260 + i * 25);
        b.Text = @"x";
        b.BackColor = Color.Red;
        b.ForeColor = Color.White;
        b.Size = new System.Drawing.Size(22, 23);
        b.Click += new System.EventHandler(this.buttoRemove_click);

        this.Lv4Tab.Controls.Add(t);
        this.Lv4Tab.Controls.Add(b);
        textboxAssesmentName.Add(t);
        buttoRemove.Add(b);
    }
}

private void buttoRemove_click(object sender, EventArgs e)
{
    Control b = sender as Control;
    Control t = b.Tag as Control;
    this.Lv4Tab.Controls.Remove(t);
    this.Lv4Tab.Controls.Remove(b);
    textboxAssesmentName.Remove(t);
    buttoRemove.Remove(b);
}