问题描述
我已经在Windows窗体的面板上动态生成了控件，并且还生成了一个用于删除控件的按钮，这些控件都是成行的.
I have dynamically generated controls on the panels of windows form and i have also generated a button for removing the controls, all in rows.
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后将其删除?
Now how do I remove all the controls from a row upon clicking a button from that row?
推荐答案
您仍然没有说出要删除的控件，要删除的控件的类型或如何识别它们.
You are still not saying which control you want to remove, what type of controls you want to remove or how you want to identify them.
您可以循环浏览控件以删除特定的控件.
You could just loop through the controls to remove specific Controls.
如果您有Linq，则很容易:
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<ComboBox>())
{
panel1.Controls.Remove(item);
}
//to remove control by Name
foreach (Control item in panel1.Controls.OfType<Control>())
{
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
}
}
}
执行相同的操作很容易，因为您已经为控件添加了标签.您所需要的只是从标记中取回控件. 但是您需要适当地标记:
Its easy to do the same since you're tagging the control already. All you need is to just retrieve the control back from tag. But you need to tag appropriately:
相反，请执行以下操作:
Do this instead:
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<Control>())
{
if (item.Tag == sender || item == sender)
panel1.Controls.Remove(item);
}
}
在此处使用按钮标记控件，因此在单击按钮时，可以删除其标签是从sender参数获得的被单击按钮的所有控件.但是这种方法的缺点是您必须枚举面板的所有控件，但这并不是很好.
Here you are tagging controls with the button, hence on the button click you can remove all the controls whose tags are the clicked button which you get from sender argument. But the downside of this approach is that you have to enumerate all the controls of the panel which is not great.
当我开始学习以下代码时，该代码适用于OP暂时未使用的表格布局面板.但是无论如何，表格面板布局更适合此工作.
我建议您这样做:
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;
}
}
}
这篇关于从面板中删除动态控件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！