C# 数据库备份问题？？

    #region  备份
        private void BeiFen()
        {
            try
            {
                string strg = Application.StartupPath.ToString();
                strg = strg.Substring(0, strg.LastIndexOf("\\"));
                strg = strg.Substring(0, strg.LastIndexOf("\\"));
                strg += @"\Data";

                string backSQL = @"BACKUP?DATABASE?jxc?TO?Disk='" + strg + "\\" + "" + ".bak" + "'";
                DbHelperSQL.ExecuteSql(backSQL);
                if (MessageBox.Show("备份成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation) == DialogResult.OK)
                {
                    this.Close();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
        }
     
        #endregion

备份时报错语法问题?错误是《‘’》
[解决办法]
看backSQL的语法没有问题.
请问LZ程序所连的数据库是SQL Server吗?
把此句SQL单独放在SSMS里执行是否正常?
[解决办法]
在C#中执行路径的话要用@前缀，你再试试看