{

           byte[] bytes= (byte[])dataset.Tables[0].Rows[this.listBox1.SelectedIndex][1];

              MemoryStream memStream=new MemoryStream(bytes);

              try

              {

                     Bitmap myImage = new Bitmap(memStream);

                     this.pictureBox1.Image= myImage;

              }

              catch

              {

                     this.pictureBox1.Image=null;

              }

       }

⑹ 添加“更换图片”的Click事件代码

private void buttonUpdateImage_Click(object sender, System.EventArgs e)

{

       OpenFileDialog openFileDialog1=new OpenFileDialog();

       openFileDialog1.ShowDialog();

       if (openFileDialog1.FileName.Trim()!="")

   {

              Stream myStream = openFileDialog1.OpenFile();

              int length=(int)myStream.Length;

              byte[] bytes=new byte[length];

              myStream.Read(bytes,0,length);

              myStream.Close();

           dataset.Tables[0].Rows[this.listBox1.SelectedIndex][1] =bytes;

              ShowImage();

       }

}

⑺ 添加“移除图片”的Click事件代码

private void buttonMoveImage_Click(object sender, System.EventArgs e)

{

       byte[] bytes= System.Text.Encoding.Unicode.GetBytes("");

       dataset.Tables[0].Rows[this.listBox1.SelectedIndex][1]=

        bytes;