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 WindowsFormsApplication49
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
      radioButton1.Checked = true;
      pictureBox1.Visible = false;
      textBox1.Visible = true;
    }
    //“查看”按钮
    private void button1_Click(object sender, EventArgs e)
    {
      IDataObject data;//为传送数据提供与格式无关的接口
      string format = FormatString();
      if (format == "Bitmap")
      {
        textBox1.Visible = false;
        pictureBox1.Visible = true;
        data = Clipboard.GetDataObject();//检索位于当前系统剪切板的数据
        if (data.GetDataPresent(format))//确定此实例中存储的数据是否与指定的格式关联，返回布尔
        {
          pictureBox1.Image = (Bitmap)data.GetData(format);//检索与指定的格式关联的数据
          pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
        }
        else
        {
          MessageBox.Show("格式不正确", "提示");
        }
      }
      else
      {
        textBox1.Visible = true;
        pictureBox1.Visible = false;
        data = Clipboard.GetDataObject();
        if (data.GetDataPresent(format))
        {
          textBox1.Text = (string)data.GetData(format);
        }
        else
        {
          MessageBox.Show("格式不正确", "提示");
        }
      }
    }
    private string FormatString()
    {
      string format = "";
      if (radioButton1.Checked) format = DataFormats.Text;//得到IDATAOBJECT里面数据的格式
      if (radioButton2.Checked) format = DataFormats.Rtf;
      if (radioButton3.Checked) format = DataFormats.Bitmap;
      if (radioButton4.Checked) format = DataFormats.Html;
      return format;
    }
  }
}