.Net SQLデータベースのwebバックアップ

 1  protected void ButtonDataBackup_Click(object sender, EventArgs e)
 2     {
 3         string newname = " " + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + ".rar";
 4 
 5         // 
 6 
 7         string con = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];
 8 
 9         System.Data.SqlClient.SqlConnection cn = new SqlConnection(con);
10 
11         string nepath = Server.MapPath("~/Web/DataImport/DataBackup/") + newname;
12 
13         string sql = "BACKUP DATABASE OnLineExam to DISK ='" + nepath + "'";
14 
15         SqlCommand cmd = new SqlCommand(sql, cn);
16 
17         try
18         {
19             cn.Open();
20 
21             cmd.ExecuteNonQuery(); 
22             HyperLink1.Text = " ：" + "  ！";
23             HyperLink1.NavigateUrl = "/DataBackup/" + Fname +newname;
24             HyperLink1.Visible = true;         
25         }
26 
27         catch (Exception ex)
28         {
29             LblMessage.Text = " ， ！";
30             LblMessage.Visible = true;
31             string exm = ex.Message;         
32 
33         }
34 
35         finally
36         {
37 
38             cmd.Dispose();
39 
40             cn.Close();
41 
42             cn.Dispose();
43 
44         }     
45     }