面板 1 上的动态按钮 - 位置

Question

所以我有一个带有可滚动面板的应用程序，它在面板上动态列出文件夹。在文件夹列表下方，我还有一个按钮。单击按钮后，它会在每个文件夹列表旁边动态创建一个按钮。我的每个按钮的 Y 值每次都增加 =+ 26 - 如果我的面板还不可滚动，这一切都很好。一旦面板变得可滚动并且我向下滚动然后继续添加更多按钮，它会跳转几个空格然后只添加更多按钮。我认为这与更改为 Y 位置的滚动有关？我该如何解决这个问题？

C# WinForms

感谢和问候。

private void button1_Click(object sender, EventArgs e)
{
    Button newButton = new Button();
    newButton.Location = new System.Drawing.Point(0, (y+6));
    buttons.Add(newButton);
    y += 20;
    panel1.Controls.Add(newButton);
}

Answer 1

您可以尝试从最后一个按钮动态获取按钮的 y 位置：本例中为 (i-1)，

    private void button1_Click(object sender, EventArgs e)
    {
        Button newButton = new Button();
        newButton.Location = new System.Drawing.Point(0, buttons[i -1].Location.Y + 26);
        i++;
        buttons.Add(newButton);
        panel1.Controls.Add(newButton);
    }

Answer 2

您可以使用 class 创建和管理按钮，例如

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

public class CreateButtons
{
    /// <summary>
    /// Size to create each button
    /// </summary>
    /// <returns></returns>
    public Size ButtonSize { get; set; }
    /// <summary>
    /// Provides a reference to your buttons
    /// </summary>
    /// <returns></returns>
    public List<Button> Buttons { get; set; }
    /// <summary>
    /// base name of buttone e.g. btn, cmd etc.
    /// </summary>
    /// <returns></returns>
    public string ButtonBaseName { get; set; }
    /// <summary>
    /// Used to spread out buttons
    /// </summary>
    /// <returns></returns>
    public int Base { get; set; }
    public int BaseAddition { get; set; }
    /// <summary>
    /// Count of buttons
    /// </summary>
    /// <returns></returns>
    public int ButtonCount { get; set; }
    /// <summary>
    /// control to place buttons onto
    /// </summary>
    /// <returns></returns>
    public Control ParentControl { get; set; }
    public CreateButtons(string BaseName)
    {
        this.ButtonBaseName = BaseName;
    }
    /// <summary>
    /// Create single button and add it to the list of buttons property
    /// </summary>
    /// <param name="item"></param>
    public void CreateSingleButton(string item)
    {
        if (Buttons == null)
        {
            Buttons = new List<Button>();
        }
        Button b = new Button
        {
            Name = string.Concat(ButtonBaseName, item),
            Text = item,
            Size = ButtonSize,
            Location = new Point(25, this.Base),
            Parent = ParentControl,
            Visible = true
        };

        // wire up an event or have an event it gets wired too
        b.Click += (object s, EventArgs e) =>
        {
            //Button tb = (Button)s;
            //MessageBox.Show(tb.Text);
        };

        this.ParentControl.Controls.Add(b);
        Buttons.Add(b);
        Base += BaseAddition;
    }
}

在带有滚动面板的表单设置中，一个列表框（显示我们可以访问所有创建的按钮），一个允许您通过为每个按钮命名来测试它的文本框。用于创建添加到列表中的单个按钮的按钮。

using System;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace CreateDynamicButtons1_cs
{
    public partial class Form1 : Form
    {
        private CreateButtons buttons = new CreateButtons("btn");

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            buttons.ParentControl = panel1;
            buttons.Base = 10;
            buttons.BaseAddition = 35;
            buttons.ButtonSize = new Size(50, 25);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrWhiteSpace(textBox1.Text))
            {
                buttons.CreateSingleButton(textBox1.Text);
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (buttons.Buttons != null)
            {
                listBox1.DataSource = 
                    buttons.Buttons.Select(item => item.Name).ToList();
            }
        }
    }
}

Answer 3

只需将您的动态按钮行替换为以下内容：

panel1.AutoScroll = true;
        Button myButton = new Button();
        myButton.Location = new Point(
           panel1.AutoScrollPosition.X,
           panel1.AutoScrollPosition.Y + (y+6));
        y += 20;
        panel1.Controls.Add(myButton);

面板 1 上的动态按钮 - 位置

dynamic buttons on panel1 - locations

c#

panels

winforms

scrollable