如何提取richtextbox中的图片并保存到一个文件里？
数据库中的某个字段是blob类型，其中的内容为图文混排。
如何将其中的文字和图片都分开单独存成文件？

C# code

private void button2_Click(object sender, EventArgs e)        {            richTextBox1.SelectAll();            richTextBox1.Copy();             string str = richTextBox1.Text;//获取文本部分            Image img1 = (Image)Clipboard.GetData(System.Windows.Forms.DataFormats.Bitmap);//获取图片部分            if (img1 != null)            {                img1.Save(Application.ExecutablePath + "a.bmp");            }        }

C# code

     string _RtfText=richTextBox1.SelectedRtf;            IList<string> _ImageList =new List<string>();            while(true)            {                int _Index = _RtfText.IndexOf("pichgoal");                if(_Index==-1)break;                _RtfText=_RtfText.Remove(0,_Index+8);                _Index = _RtfText.IndexOf("\r\n");                                int _Temp = Convert.ToInt32(_RtfText.Substring(0, _Index));                _RtfText = _RtfText.Remove(0, _Index);                _RtfText = _RtfText.Replace("\r\n", "");                _Index = _RtfText.IndexOf("}");                _ImageList.Add(_RtfText.Substring(0, _Index));                _RtfText = _RtfText.Remove(0, _Index);                                            }            for (int i = 0; i != _ImageList.Count; i++)            {                System.IO.FileStream _File = new FileStream(Application.StartupPath + "\\" + i.ToString() + ".dat", System.IO.FileMode.Create);                int _Count=_ImageList[i].Length/2;                for (int z = 0; z != _Count; z++)                {                    string _TempText=_ImageList[i][z*2].ToString()+_ImageList[i][(z*2)+1].ToString();                    _File.WriteByte(Convert.ToByte(_TempText, 16));                }                _File.Close();            }                       MessageBox.Show(_ImageList.Count.ToString());