WinForm中SaveFileDialog的用法

        #region 保存对话框
        private void ShowSaveFileDialog()
        {
            //string localFilePath, fileNameExt, newFileName, FilePath;   
            SaveFileDialog sfd = new SaveFileDialog();

            //设置文件类型   
            sfd.Filter = "数据库备份文件（*.bak）|*.bak|数据文件（*.mdf）|*.mdf|日志文件（*.ldf）|*.ldf";

            //设置默认文件类型显示顺序   
            sfd.FilterIndex = 1;

            //保存对话框是否记忆上次打开的目录   
            sfd.RestoreDirectory = true;

            //点了保存按钮进入   
            if (sfd.ShowDialog() == DialogResult.OK)
            {
                string localFilePath = sfd.FileName.ToString();     //获得文件路径 
                string fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);     //获取文件名，不带路径

                //获取文件路径，不带文件名   
                //FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf("\\"));  

                //给文件名前加上时间   
                //newFileName = DateTime.Now.ToString("yyyyMMdd") + fileNameExt;  

                //在文件名里加字符   
                //saveFileDialog1.FileName.Insert(1,"dameng");  

                //System.IO.FileStream fs = (System.IO.FileStream)sfd.OpenFile();//输出文件  

                ////fs输出带文字或图片的文件，就看需求了   
            }
        }

        #endregion