.Net对SQL数据库的web备份

　　基于B/S模式下的，数据库远程备份，备份成功后可下载到本地

 protected void ButtonDataBackup_Click(object sender, EventArgs e)
    {
        string newname = "数据库名" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + ".rar";

        //创建连接字

        string con = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];

        System.Data.SqlClient.SqlConnection cn = new SqlConnection(con);

        string nepath = Server.MapPath("~/Web/DataImport/DataBackup/") + newname;

        string sql = "BACKUP DATABASE OnLineExam to DISK ='" + nepath + "'";

        SqlCommand cmd = new SqlCommand(sql, cn);

        try
        {
            cn.Open();

            cmd.ExecuteNonQuery(); 
            HyperLink1.Text = "数据已成功备份到服务器路径：" + " 请点击下载到本地！";
            HyperLink1.NavigateUrl = "/DataBackup/" + Fname +newname;
            HyperLink1.Visible = true;         
        }

        catch (Exception ex)
        {
            LblMessage.Text = "数据备份出错，该文件可能不存在！";
            LblMessage.Visible = true;
            string exm = ex.Message;         

        }

        finally
        {

            cmd.Dispose();

            cn.Close();

            cn.Dispose();

        }     
    }