[英]Flowlayout Adding control in between controls dynamically
我正在對現有應用程序進行更改。 我被困在一個需要在流面板中間添加控件的問題上。 我已經簡化了下面的問題。
每個 object 添加了 label 和按鈕控件。 我在初始屏幕啟動時添加了 3 組對象。
當用戶單擊任何按鈕時,會添加另一個 object:
但是,我需要控件位於單擊它的按鈕下方,而不是添加到底部。 例如,單擊 A 按鈕,然后 Label D 和按鈕 d 應出現在 A 按鈕下方並向下移動其他控件。 該事件是一個按鈕,但也可以是其他事件,例如下拉菜單,但規則/行為是相同的。 是否可以在流面板中間添加控件?
以下是代碼示例:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApp8
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
List<Control_Info> list = new List<Control_Info>();
list.Add(new Control_Info { Label_Name = "Test A", Button_Name = "Desc A" });
list.Add(new Control_Info { Label_Name = "Test B", Button_Name = "Desc B" });
list.Add(new Control_Info { Label_Name = "Test C", Button_Name = "Desc C" });
foreach (Control_Info ci in list)
{
loadControlToPanel(ci);
}
}
private void loadControlToPanel(Control_Info ci)
{
Label label = new Label();
label.Text = ci.Label_Name;
label.AutoSize = false;
flowLayoutPanel1.Controls.Add(label);
Button button = new Button();
button.Text = ci.Button_Name;
button.AutoSize = false;
button.Click += new EventHandler(buttonClickEvent);
flowLayoutPanel1.Controls.Add(button);
}
private void buttonClickEvent(object sender, EventArgs e)
{
Control_Info ci = new Control_Info{ Label_Name = "Test D", Button_Name = "Desc D" };
loadControlToPanel(ci);
}
}
}
使用SetChildIndex(...);
方法,例如:
Form f5 = new Form();
FlowLayoutPanel panel = new FlowLayoutPanel { FlowDirection = FlowDirection.TopDown, Dock = DockStyle.Fill };
f5.Controls.Add(panel);
Label lbA = new Label { Text = "A" };
Button btnA = new Button { Text = "A" };
panel.Controls.Add(lbA);
panel.Controls.Add(btnA);
char c = 'B';
EventHandler action = null;
action = (o, e) => {
int index = panel.Controls.IndexOf((Control) o); // index of button clicked
Label lbNew = new Label { Text = c.ToString() };
Button btnNew = new Button { Text = c.ToString() };
btnNew.Click += action;
c++;
panel.SuspendLayout();
panel.Controls.Add(lbNew);
panel.Controls.Add(btnNew);
panel.Controls.SetChildIndex(btnNew, index+1);
panel.Controls.SetChildIndex(lbNew, index+1);
panel.ResumeLayout(true);
};
btnA.Click += action;
Application.Run(f5);
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