在剪贴板上保存自定义对象

剪贴板上一般放置的都是由DataFormats类定义好的数据类型，其实我们也可以定义自己的数据类型。
创建自己写的类的对象，再将该对象在程序与剪贴板之间传来传去，挺有意思哦

代码中已有注释，不再做说明。

先创建一个类，用作表达数据信息：

 1using System;
 2
 3namespace SimpleTest
 4{
 5 /**//// <summary>
 6 /// UserInfo 的摘要说明。
 7 /// </summary>
 8 [Serializable]//必须给此类加上这个标志，表明此类是可以序列化的（即可以将此类创建的对象转换为数据流）
 9 public class UserInfo
10 {
11  public UserInfo()
12  {
13   //
14   // TODO: 在此处添加构造函数逻辑
15   //
16  }
17  public string Name = "余智学";
18  public bool IsMan = true;
19  public int Age = 20;
20  public DateTime Birthday = new DateTime(1986,1,1);
21 }
22}
23
24

实现功能的窗体：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Data.SqlClient;

namespace SimpleTest
{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button btnCopyToClipboard;
        private System.Windows.Forms.Button btnPasteFromClipboard;
        private System.Windows.Forms.TextBox txtName;
        private System.Windows.Forms.RadioButton rdoIsMan;
        private System.Windows.Forms.NumericUpDown numAge;
        private System.Windows.Forms.DateTimePicker dtpBirthday;
        private System.Windows.Forms.RadioButton rdoIsWoman;
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.btnCopyToClipboard = new System.Windows.Forms.Button();
            this.btnPasteFromClipboard = new System.Windows.Forms.Button();
            this.txtName = new System.Windows.Forms.TextBox();
            this.rdoIsMan = new System.Windows.Forms.RadioButton();
            this.rdoIsWoman = new System.Windows.Forms.RadioButton();
            this.numAge = new System.Windows.Forms.NumericUpDown();
            this.dtpBirthday = new System.Windows.Forms.DateTimePicker();
            ((System.ComponentModel.ISupportInitialize)(this.numAge)).BeginInit();
            this.SuspendLayout();
            // 
            // btnCopyToClipboard
            // 
            this.btnCopyToClipboard.Location = new System.Drawing.Point(84, 216);
            this.btnCopyToClipboard.Name = "btnCopyToClipboard";
            this.btnCopyToClipboard.Size = new System.Drawing.Size(104, 23);
            this.btnCopyToClipboard.TabIndex = 0;
            this.btnCopyToClipboard.Text = "复制到剪贴板";
            this.btnCopyToClipboard.Click += new System.EventHandler(this.btnCopyToClipboard_Click);
            // 
            // btnPasteFromClipboard
            // 
            this.btnPasteFromClipboard.Location = new System.Drawing.Point(260, 216);
            this.btnPasteFromClipboard.Name = "btnPasteFromClipboard";
            this.btnPasteFromClipboard.Size = new System.Drawing.Size(104, 23);
            this.btnPasteFromClipboard.TabIndex = 0;
            this.btnPasteFromClipboard.Text = "从剪贴板粘贴";
            this.btnPasteFromClipboard.Click += new System.EventHandler(this.btnPasteFromClipboard_Click);
            // 
            // txtName
            // 
            this.txtName.Location = new System.Drawing.Point(156, 48);
            this.txtName.Name = "txtName";
            this.txtName.Size = new System.Drawing.Size(120, 21);
            this.txtName.TabIndex = 1;
            this.txtName.Text = "";
            // 
            // rdoIsMan
            // 
            this.rdoIsMan.Checked = true;
            this.rdoIsMan.Location = new System.Drawing.Point(160, 88);
            this.rdoIsMan.Name = "rdoIsMan";
            this.rdoIsMan.Size = new System.Drawing.Size(48, 24);
            this.rdoIsMan.TabIndex = 2;
            this.rdoIsMan.TabStop = true;
            this.rdoIsMan.Text = "男";
            // 
            // rdoIsWoman
            // 
            this.rdoIsWoman.Location = new System.Drawing.Point(232, 88);
            this.rdoIsWoman.Name = "rdoIsWoman";
            this.rdoIsWoman.Size = new System.Drawing.Size(56, 24);
            this.rdoIsWoman.TabIndex = 2;
            this.rdoIsWoman.Text = "女";
            // 
            // numAge
            // 
            this.numAge.Location = new System.Drawing.Point(156, 128);
            this.numAge.Name = "numAge";
            this.numAge.Size = new System.Drawing.Size(128, 21);
            this.numAge.TabIndex = 3;
            // 
            // dtpBirthday
            // 
            this.dtpBirthday.Location = new System.Drawing.Point(156, 168);
            this.dtpBirthday.Name = "dtpBirthday";
            this.dtpBirthday.Size = new System.Drawing.Size(128, 21);
            this.dtpBirthday.TabIndex = 4;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(448, 325);
            this.Controls.Add(this.dtpBirthday);
            this.Controls.Add(this.numAge);
            this.Controls.Add(this.rdoIsMan);
            this.Controls.Add(this.txtName);
            this.Controls.Add(this.btnCopyToClipboard);
            this.Controls.Add(this.btnPasteFromClipboard);
            this.Controls.Add(this.rdoIsWoman);
            this.KeyPreview = true;
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.numAge)).EndInit();
            this.ResumeLayout(false);

        }
        #endregion

        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }
        /**//// <summary>
        /// 根据窗体上各个控件的值创建UserInfo对象
        /// </summary>
        /// <returns></returns>
        private UserInfo CreateObj()
        {
            UserInfo obj = new UserInfo();
            obj.Name = this.txtName.Text;
            obj.IsMan = this.rdoIsMan.Checked;
            obj.Age = (int)this.numAge.Value;
            obj.Birthday = this.dtpBirthday.Value;
            return obj;
        }
        /**//// <summary>
        /// 在窗体上显示UserInfo对象
        /// </summary>
        /// <param name="obj"></param>
        private void ShowObjInForm(UserInfo obj)
        {
            if(obj != null)
            {
                this.txtName.Text = obj.Name;
                this.rdoIsMan.Checked = obj.IsMan;
                this.rdoIsWoman.Checked = !obj.IsMan;
                this.numAge.Value = obj.Age;
                this.dtpBirthday.Value = obj.Birthday;
            }
        }
        private void btnCopyToClipboard_Click(object sender, System.EventArgs e)
        {
            UserInfo obj = this.CreateObj();
            //申请注册一个新的Clipboard数据格式
            DataFormats.Format UserInfoFormat = DataFormats.GetFormat("UserInfo");
            //将对象包容到DataObj中
            IDataObject myDataObj = new DataObject(obj);
            //复制到剪贴板，并在退出程序时仍然保存
            Clipboard.SetDataObject(myDataObj,true);
            MessageBox.Show("对象已复制到剪贴板！");
        }
        private void btnPasteFromClipboard_Click(object sender, System.EventArgs e)
        {
            //从剪贴板中提取对象
            IDataObject retObj = Clipboard.GetDataObject();
            //判断剪贴板上的数据是否是UserInfo类型的
            if(retObj.GetDataPresent("SimpleTest.UserInfo"))
            {
                //获取UserInfo对象
                UserInfo obj = retObj.GetData("SimpleTest.UserInfo") as UserInfo;
                //在窗体上显示对象
                this.ShowObjInForm(obj);
            }
            else
            {
                MessageBox.Show("不支持的数据格式！");
            }
        }
        private void Form1_Load(object sender, System.EventArgs e)
        {
            ShowObjInForm(new UserInfo());
        }            
        
    }
}