c#.net 文本编辑控件——RichTextBox中插入图片

        private void InsertImage()
        {
            OpenFileDialog openImageDlg = new OpenFileDialog();
            openImageDlg.Filter = "所有图片(*.bmp,*.gif,*.jpg)|*.bmp;*.gif;*jpg";
            openImageDlg.Title = "选择图片";

            Bitmap bmp;
            if (openImageDlg.ShowDialog() == DialogResult.OK)
            {
                string fileName = openImageDlg.FileName;
                if (null == fileName || fileName.Trim().Length == 0)
                    return;
                try
                {
                    bmp = new Bitmap(fileName);
                    Clipboard.SetDataObject(bmp);
                    DataFormats.Format dataFormat = 
                        DataFormats.GetFormat(DataFormats.Bitmap);
                    if (curRichTextBox.CanPaste(dataFormat))
                        curRichTextBox.Paste(dataFormat);
                }
                catch (Exception exc)
                {
                    MessageBox.Show("图片插入失败。" + exc.Message, "提示",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
        }