如何在另一个表单上显示GroupBox及其内容？

Question

我有两个表格。在第一个表单中，我有一个虚拟的数字键盘(我有一个GroupBox，里面有数字按钮，这是我的虚拟数字键盘)。使用这个虚拟的数字键盘，我将数字输入到TextBox中。在第二个表单中，我有另一个TextBox，我可以在其中输入数字。

我想在第二个表单上使用我的虚拟数字键盘。我该怎么做呢？

如果有人一步一步地向我解释我应该做什么，我会很高兴。

Answer 1

1)创建一个WinForms项目，我叫它"ReusingUserControlsSample“

2)创建一个新的UserControl，将其命名为MyUserControlWithButtons或其他您喜欢的名称

3)出于习惯，在UserControl属性上设置AutoSize=true和AutoSizeMode=GrowAndShrink。稍后，您可能会了解它们的用途

4)在控件上放置一些按钮，将它们命名为"btnLetterA"，"btnLetterB"，"btnLetterC“

5)双击每个按钮，这样就会生成点击处理程序

6)在用户控件的代码中，创建一个public TextBox TheOutput属性

7)在用户控件的代码中，在步骤(5)中生成的每个单击处理程序中，添加一行向TheOutput textbox的TextBox属性添加一些文本。记住检查TheOutput是否为空。

构建。

8)返回Form1

9)将键盘放在表单上，将其命名为“myMyUserControlWithButtons”

10)在表单上放置一个TextBox，将其命名为"mytextbox“

11)转到Form1的代码

12)在te构造函数中，在"InitializeComponent“下面，将mytextbox赋值给mykeyboard的TheOutput

这就是了。现在您可以构建并运行它了，一切都应该正常了。请不要说“键盘”的全部代码都在用户控件中。表单仅将其设置为与文本框一起使用。在第二种情况下，你可以用同样的方法:放置键盘，放置文本框，将键盘设置为写入该文本框，它将同样起作用。

代码：

MyUserControlWithButtons.cs

using System;
using System.Windows.Forms;

namespace ReusingUserControlsSample
{
    public partial class MyUserControlWithButtons : UserControl
    {
        public MyUserControlWithButtons()
        {
            InitializeComponent();
        }

        public TextBox TheOutput { get; set; }

        private void btnLetterA_Click(object sender, EventArgs e)
        {
            TheOutput.Text += "A";
        }

        private void btnLetterB_Click(object sender, EventArgs e)
        {
            TheOutput.Text += "B";
        }

        private void btnLetterC_Click(object sender, EventArgs e)
        {
            TheOutput.Text += "C";
        }
    }
}

MyUserControlWithButtons.cs

namespace ReusingUserControlsSample
{
    partial class MyUserControlWithButtons
    {
        /// <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.btnLetterA = new System.Windows.Forms.Button();
            this.btnLetterB = new System.Windows.Forms.Button();
            this.btnLetterC = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // btnLetterA
            // 
            this.btnLetterA.Location = new System.Drawing.Point(3, 3);
            this.btnLetterA.Name = "btnLetterA";
            this.btnLetterA.Size = new System.Drawing.Size(66, 21);
            this.btnLetterA.TabIndex = 0;
            this.btnLetterA.Text = "The \"A\"";
            this.btnLetterA.UseVisualStyleBackColor = true;
            this.btnLetterA.Click += new System.EventHandler(this.btnLetterA_Click);
            // 
            // btnLetterB
            // 
            this.btnLetterB.Location = new System.Drawing.Point(66, 30);
            this.btnLetterB.Name = "btnLetterB";
            this.btnLetterB.Size = new System.Drawing.Size(66, 21);
            this.btnLetterB.TabIndex = 0;
            this.btnLetterB.Text = "The \"B\"";
            this.btnLetterB.UseVisualStyleBackColor = true;
            this.btnLetterB.Click += new System.EventHandler(this.btnLetterB_Click);
            // 
            // btnLetterC
            // 
            this.btnLetterC.Location = new System.Drawing.Point(3, 57);
            this.btnLetterC.Name = "btnLetterC";
            this.btnLetterC.Size = new System.Drawing.Size(66, 21);
            this.btnLetterC.TabIndex = 0;
            this.btnLetterC.Text = "The \"C\"";
            this.btnLetterC.UseVisualStyleBackColor = true;
            this.btnLetterC.Click += new System.EventHandler(this.btnLetterC_Click);
            // 
            // MyUserControlWithButtons
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.AutoSize = true;
            this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.Controls.Add(this.btnLetterC);
            this.Controls.Add(this.btnLetterB);
            this.Controls.Add(this.btnLetterA);
            this.Name = "MyUserControlWithButtons";
            this.Size = new System.Drawing.Size(135, 81);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button btnLetterA;
        private System.Windows.Forms.Button btnLetterB;
        private System.Windows.Forms.Button btnLetterC;
    }
}

Form1.cs

using System.Windows.Forms;

namespace ReusingUserControlsSample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            mykeyboard.TheOutput = mytextbox;
        }
    }
}

Form1.Designer.cs

namespace ReusingUserControlsSample
{
    partial class Form1
    {
        /// <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 Windows Form 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.mytextbox = new System.Windows.Forms.TextBox();
            this.mykeyboard = new ReusingUserControlsSample.MyUserControlWithButtons();
            this.SuspendLayout();
            // 
            // mytextbox
            // 
            this.mytextbox.Location = new System.Drawing.Point(84, 38);
            this.mytextbox.Name = "mytextbox";
            this.mytextbox.Size = new System.Drawing.Size(100, 20);
            this.mytextbox.TabIndex = 0;
            // 
            // mykeyboard
            // 
            this.mykeyboard.AutoSize = true;
            this.mykeyboard.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.mykeyboard.Location = new System.Drawing.Point(66, 122);
            this.mykeyboard.Name = "mykeyboard";
            this.mykeyboard.Size = new System.Drawing.Size(135, 81);
            this.mykeyboard.TabIndex = 1;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 264);
            this.Controls.Add(this.mykeyboard);
            this.Controls.Add(this.mytextbox);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox mytextbox;
        private MyUserControlWithButtons mykeyboard;
    }
}

Program.cs

using System;
using System.Windows.Forms;

namespace ReusingUserControlsSample
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

Answer 2

创建一个UserControl，并将您的虚拟数字键盘分组框/按钮放在上面。然后在每个表单上替换现有的组框/按钮，添加新的用户控件。

Answer 3

您有两个选择：

• 或者创建一个名为"VirtualKeypad“的UserControl，并将GroupBox和键盘按钮移动到那里，然后在这两个窗体上使用(放置)新的"VirtualKeypad”控件。你的控件必须公开一些事件，或者有一个属性告诉它将文本放在哪个文本框中，等等。
• ，或者，如果你只想有一个键盘，你的就有麻烦了。键盘必须是一个，但是你的键盘按钮如何知道把输入的文本放在哪里呢？你必须倾听焦点的变化，这样当你点击/触摸文本框(第一个或第二个)，然后点击/触摸小键盘时，键盘将不得不检查谁在他之前获得了焦点(是第一个还是第二个文本框上的旧焦点)，然后将数字/字母放在那里。这样做会有点棘手..此外，如果您是WinForms的初学者，您可能会在两个独立窗口之间的通信方面遇到一些问题。我建议你先试试UserControl。