从面板中删除动态控件

我在Windows窗体的面板上动态生成控件，我还生成了一个用于删除控件的按钮，所有控件都在行中。

int c = 0; private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; ComboBox combo = new ComboBox(); combo.Name = "combobox" + v ; combo.Location = new Point(30, 5 + (30 * v)); ComboBox combo2 = new ComboBox(); combo2.Name = "combobox2" + v ; combo2.Location = new Point(170, 5 + (30 * v)); TextBox txt = new TextBox(); txt.Name = "txtbx" + v; txt.Location = new Point(300, 5 + (30 * v)); TextBox txt2 = new TextBox(); txt2.Name = "txtbx2" + v; txt2.Location = new Point(450, 5 + (30 * v)); TextBox txt3 = new TextBox(); txt3.Name = "txtbx3" + v; txt3.Location = new Point(600, 5 + (30 * v)); Button btn = new Button(); btn.Name = "btn" + v; btn.Text = "Remove"; btn.Location = new Point(750, 5 + (30 * v)); panel1.Controls.Add(combo); panel1.Controls.Add(btn); panel1.Controls.Add(txt); panel1.Controls.Add(combo2); panel1.Controls.Add(txt2); panel1.Controls.Add(txt3); btn.Click += new EventHandler(btn_Click); combo.Tag = btn; combo2.Tag = combo; btn.Tag = combo2; } private void btn_Click(object sender, EventArgs e) { ComboBox cb3 = btnh.Tag as ComboBox; ComboBox cb4 = cb3.Tag as ComboBox; panel1.Controls.Remove(cb3); panel1.Controls.Remove(cb4); panel1.Controls.Remove(btnh); } 

现在，如何在单击该行中的按钮时从一行中删除所有控件？

Answer 1

您仍然没有说明要删除哪个控件，要删除哪种控件或者如何识别它们。

您可以循环访问控件以删除特定控件。

如果你有Linq ，它很容易：

 private void btn_Click(object sender, EventArgs e) { panel1.Controls.Clear(); //to remove all controls //to remove all comboboxes foreach (Control item in panel1.Controls.OfType()) { panel1.Controls.Remove(item); } //to remove control by Name foreach (Control item in panel1.Controls.OfType()) { if (item.Name == "bloodyControl") panel1.Controls.Remove(item); } //to remove just one control, no Linq foreach (Control item in panel1.Controls) { if (item.Name == "bloodyControl") { panel1.Controls.Remove(item); break; //important step } } } 

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编辑：

由于您已经标记了控件，因此很容易做到这一点。 您只需从标签中检索控件即可。 但是你需要适当标记：

改为：

 private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; Button btn = new Button(); btn.Name = "btn" + v; btn.Text = "Remove"; btn.Location = new Point(750, 5 + (30 * v)); btn.Click += new EventHandler(btn_Click); ComboBox combo = new ComboBox(); combo.Name = "combobox" + v ; combo.Location = new Point(30, 5 + (30 * v)); combo.Tag = btn; ComboBox combo2 = new ComboBox(); combo2.Name = "combobox2" + v ; combo2.Location = new Point(170, 5 + (30 * v)); combo2.Tag = btn; TextBox txt = new TextBox(); txt.Name = "txtbx" + v; txt.Location = new Point(300, 5 + (30 * v)); txt.Tag = btn; TextBox txt2 = new TextBox(); txt2.Name = "txtbx2" + v; txt2.Location = new Point(450, 5 + (30 * v)); txt2.Tag = btn; TextBox txt3 = new TextBox(); txt3.Name = "txtbx3" + v; txt3.Location = new Point(600, 5 + (30 * v)); txt3.Tag = btn; panel1.Controls.Add(combo); panel1.Controls.Add(btn); panel1.Controls.Add(txt); panel1.Controls.Add(combo2); panel1.Controls.Add(txt2); panel1.Controls.Add(txt3); } private void btn_Click(object sender, EventArgs e) { //to remove control by Name foreach (Control item in panel1.Controls.OfType()) { if (item.Tag == sender || item == sender) panel1.Controls.Remove(item); } } 

在这里，您使用按钮标记控件，因此在按钮单击时，您可以删除所有控件，其标签是您从sender参数获得的单击按钮。 但这种方法的缺点是你必须枚举面板的所有控件都不是很好。

编辑：当我开始学习时，下面的代码是针对OP现在不使用的表格布局面板。 但无论如何，桌面布局更适合这项工作。

我建议你这样做：

 private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; Button btn = new Button(); btn.Name = "btn" + v; btn.Text = "Remove"; btn.Location = new Point(750, 5 + (30 * v)); btn.Click += new EventHandler(btn_Click); btn.Tag = v; ComboBox combo = new ComboBox(); combo.Name = "combobox" + v ; combo.Location = new Point(30, 5 + (30 * v)); combo.Tag = v; ComboBox combo2 = new ComboBox(); combo2.Name = "combobox2" + v ; combo2.Location = new Point(170, 5 + (30 * v)); combo2.Tag = v; TextBox txt = new TextBox(); txt.Name = "txtbx" + v; txt.Location = new Point(300, 5 + (30 * v)); txt.Tag = v; TextBox txt2 = new TextBox(); txt2.Name = "txtbx2" + v; txt2.Location = new Point(450, 5 + (30 * v)); txt2.Tag = v; TextBox txt3 = new TextBox(); txt3.Name = "txtbx3" + v; txt3.Location = new Point(600, 5 + (30 * v)); txt3.Tag = v; panel1.Controls.Add(combo); panel1.Controls.Add(btn); panel1.Controls.Add(txt); panel1.Controls.Add(combo2); panel1.Controls.Add(txt2); panel1.Controls.Add(txt3); } private void btn_Click(object sender, EventArgs e) { int toBeDeletedRow = (int)((Control)sender).Tag; for (int row = panel1.RowCount - 1; row >= 0; row--) { if (row == toBeDeletedRow) { panel1.RowStyles.RemoveAt(row); panel1.RowCount--; return; } } } 

Answer 2

如果你有一个面板o其他容器有更多dinamicaly组件可以删除所有或多个，你可以这样做。

在第一步中，您将在数组或列表中加载组件。

 List lst = new List(); foreach (Object obj in this.PanelImplementationTeam.Controls) { //DO NOT REMOVE COMPONENT IN THIS LOOP BECAUSE //YOU DECREASE THE .Controls ARRAY AND YOU WILL HAVE AN ERROR if (obj is PersonalUserControl) { lst.Add((PersonalUserControl)obj); } } foreach(PersonalUserControl uc in lst) { uc.Dispose(); } 

Answer 3

如果要删除的所有控件都在Panel中，则可以执行以下操作： panel.Controls.Clear(); 这将清除面板中的所有控件。

Answer 4

删除控制事件。 来自MSDN ：

以编程方式从集合中删除控件

1. 从事件中删除事件处理程序。 在Visual Basic中，使用RemoveHandler Statement关键字; 在Visual C＃中，使用- =运算符（C＃参考） 。
2. 使用“ 删除”方法从面板的“ 控件”集合中删除所需的控件 。
3. 调用Dispose方法以释放控件使用的所有资源。

在链接页面中使用VB和C＃给出了具体示例。