c# - 带控件的基本 UserControl - 派生控件中的对齐不正确

Question

我正在尝试构建将用于构建其他控件的基础控件。
想法是向基础添加通用功能。

我在 Visual Studio 中使用 Add>User Control 构建了基础。我的控件在右上角有 4 个按钮，它们都固定在右上角:

下面是我的控制代码:

using System;
using System.Windows.Forms;

namespace LayoutManager
{
    public partial class BasePanel : UserControl
    {
        public event EventHandler<Direction> Expand;

        public BasePanel()
        {
            InitializeComponent();
        }

        protected virtual void OnExpand(Direction e)
        {
            var handler = Expand;
            if (handler != null) handler(this, e);
        }

        private void Right(object sender, EventArgs e)
        {
            OnExpand(Direction.Right);
        }

        private void Left(object sender, EventArgs e)
        {
            OnExpand(Direction.Left);
        }

        private void Up(object sender, EventArgs e)
        {
            OnExpand(Direction.Up);
        }

        private void Down(object sender, EventArgs e)
        {
            OnExpand(Direction.Down);
        }
    }
}

和设计器代码:

namespace LayoutManager
{
    partial class BasePanel
    {
        /// <summary> 
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary> 
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Component Designer generated code

        /// <summary> 
        /// Required method for Designer support - do not modify 
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.rightBtn = new System.Windows.Forms.Button();
            this.leftBtn = new System.Windows.Forms.Button();
            this.upBtn = new System.Windows.Forms.Button();
            this.downBtn = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // rightBtn
            // 
            this.rightBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.rightBtn.Font = new System.Drawing.Font("Arial Narrow", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(238)));
            this.rightBtn.Location = new System.Drawing.Point(185, 27);
            this.rightBtn.Name = "rightBtn";
            this.rightBtn.Size = new System.Drawing.Size(23, 23);
            this.rightBtn.TabIndex = 0;
            this.rightBtn.Text = "►";
            this.rightBtn.UseVisualStyleBackColor = true;
            this.rightBtn.Click += new System.EventHandler(this.Right);
            // 
            // leftBtn
            // 
            this.leftBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.leftBtn.Font = new System.Drawing.Font("Arial Narrow", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(238)));
            this.leftBtn.Location = new System.Drawing.Point(160, 27);
            this.leftBtn.Name = "leftBtn";
            this.leftBtn.Size = new System.Drawing.Size(23, 23);
            this.leftBtn.TabIndex = 1;
            this.leftBtn.Text = "◄";
            this.leftBtn.UseVisualStyleBackColor = true;
            this.leftBtn.Click += new System.EventHandler(this.Left);
            // 
            // upBtn
            // 
            this.upBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.upBtn.Font = new System.Drawing.Font("Arial Narrow", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(238)));
            this.upBtn.Location = new System.Drawing.Point(160, 3);
            this.upBtn.Name = "upBtn";
            this.upBtn.Size = new System.Drawing.Size(23, 23);
            this.upBtn.TabIndex = 3;
            this.upBtn.Text = "▲";
            this.upBtn.UseVisualStyleBackColor = true;
            this.upBtn.Click += new System.EventHandler(this.Up);
            // 
            // downBtn
            // 
            this.downBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
            this.downBtn.Font = new System.Drawing.Font("Arial Narrow", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(238)));
            this.downBtn.Location = new System.Drawing.Point(185, 3);
            this.downBtn.Name = "downBtn";
            this.downBtn.Size = new System.Drawing.Size(23, 23);
            this.downBtn.TabIndex = 4;
            this.downBtn.Text = "▼";
            this.downBtn.UseVisualStyleBackColor = true;
            this.downBtn.Click += new System.EventHandler(this.Down);
            // 
            // BasePanel
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.Controls.Add(this.downBtn);
            this.Controls.Add(this.upBtn);
            this.Controls.Add(this.leftBtn);
            this.Controls.Add(this.rightBtn);
            this.Name = "BasePanel";
            this.Size = new System.Drawing.Size(211, 140);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button rightBtn;
        private System.Windows.Forms.Button leftBtn;
        private System.Windows.Forms.Button upBtn;
        private System.Windows.Forms.Button downBtn;
    }
}

当我添加第二个控件并将其设置为扩展 BasePanel 时:

public partial class MyPanel : BasePanel
{
    public MyPanel()
    {
        InitializeComponent();
    }
}

我得到这个控件:

但是底部右上角的按钮不再正确对齐。
我无法更改按钮属性，因为它们被锁定(点击后我可以看到左上角的小锁角)

我应该如何创建具有其他控件(在我的例子中是按钮)的基本 UserControl，以及我应该如何扩展它以使所有控件在派生控件中正确对齐？

编辑:我使用 VS2013 Pro Update 4

Answer 1

您可以使用 Panel 作为 BasePanel 中按钮的容器。然后将面板的 Dock 属性设置为 Top 并将您的 Button 控件放在面板中并将其 Anchor 属性设置为顶部，右侧。

这样，当您从BasePanel 继承时，包括容器面板和按钮在内的所有控件都是私有(private)的并且不能被编辑，但是设计者尊重控件的定位。

你也可以移除面板和按钮的设计器，这样它们对设计器处的鼠标是透明的:

public BasePanel()
{
    InitializeComponent();
    TypeDescriptor.AddAttributes(this.panel1, new DesignerAttribute(typeof(object)));
    TypeDescriptor.AddAttributes(this.button1, new DesignerAttribute(typeof(object)));
    TypeDescriptor.AddAttributes(this.button2, new DesignerAttribute(typeof(object)));
    TypeDescriptor.AddAttributes(this.button3, new DesignerAttribute(typeof(object)));
    TypeDescriptor.AddAttributes(this.button4, new DesignerAttribute(typeof(object)));
}