插入数据的经典代码

 

  1private void InsertUser()
  2        {
  3            if (Page.IsValid)
  4            {
  5                  // Save new user to the database
  6                SqlConnection con;
  7                string sql;
  8                SqlCommand cmd;
  9                StringBuilder sb = new StringBuilder();
 10                ArrayList values = new ArrayList();
 11
 12                sb.Append("INSERT INTO [User] ");
 13                sb.Append("(UserID, Login, Password, FirstName, LastName,");
 14                sb.Append(" PhoneNumber, Email, IsAdministrator, Address,");
 15                sb.Append(" CellNumber, DateOfBirth) ");
 16                sb.Append("VALUES 
                           ('{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}', '{7}', ");
 17                
 18                // Optional values without quotes as they can be the Null value.
 19                sb.Append("{8}, {9}, {10})");
 20
 21                // Escape any quotation mark entered by the user
 22                txtLogin.Text = txtLogin.Text.Replace("'","''");
 23                txtPwd.Text = txtPwd.Text.Replace("'","''");
 24                txtFName.Text = txtFName.Text.Replace("'","''");
 25                txtLName.Text = txtLName.Text.Replace("'","''");
 26                txtPhone.Text = txtPhone.Text.Replace("'","''");
 27                txtMobile.Text = txtMobile.Text.Replace("'","''");
 28                txtEmail.Text = txtEmail.Text.Replace("'","''");
 29                txtAddress.Text = txtAddress.Text.Replace("'","''");
 30                txtBirth.Text = txtBirth.Text.Replace("'","''");
 31
 32                // Add required values to replace
 33                values.Add(Guid.NewGuid().ToString());
 34                values.Add(txtLogin.Text);
 35                values.Add(txtPwd.Text);
 36                values.Add(txtFName.Text);
 37                values.Add(txtLName.Text);
 38                values.Add(txtPhone.Text);
 39                values.Add(txtEmail.Text);
 40                values.Add(0);
 41
 42                // Add the optional values or Null
 43                if (txtAddress.Text != string.Empty)
 44                    values.Add("'" + txtAddress.Text + "'");
 45                else 
 46                    values.Add("Null");
 47
 48                if (txtMobile.Text != string.Empty)
 49                    values.Add("'" + txtMobile.Text + "'");
 50                else 
 51                    values.Add("Null");
 52
 53                if (txtBirth.Text != string.Empty)
 54                    values.Add("'" + txtBirth.Text + "'");
 55                else 
 56                    values.Add("Null");
 57
 58                // Format the string with the array of values
 59                sql = String.Format(sb.ToString(), values.ToArray());
 60
 61                // Connect and execute the query
 62                con = new SqlConnection(ConfigurationSettings.AppSettings["cnFriends.ConnectionString"]);
 63                cmd = new SqlCommand(sql, con);
 64                con.Open();
 65
 66                bool doredirect = true;
 67
 68                try
 69                {
 70                    cmd.ExecuteNonQuery();
 71                }
 72                catch(SqlException e)
 73                {
 74                    if (e.Number==2627)
 75                        throw new DuplicateUsernameFRException("Can't insert record", e);
 76                    else 
 77                    {
 78                        doredirect = false;
 79                        this.lblMessage.Visible = true;
 80                        this.lblMessage.Text = "Insert couldn't be performed. ";
 81                    }
 82                }
 83                catch(OutOfMemoryException e)
 84                {
 85                    doredirect = false;
 86                    this.lblMessage.Visible = true;
 87                    this.lblMessage.Text = "We just run of out memory, " + 
 88                        "please restart the application!";
 89                }
 90                catch(Exception e)
 91                {
 92                    Trace.Warn("FriendsReunion",
 93                        "An exception was thrown: " + e.Message.ToString());
 94                    doredirect = false;
 95                    this.lblMessage.Visible = true;
 96                    this.lblMessage.Text = "Insert couldn't be performed. User name may be already taken.";
 97                }
 98                finally 
 99                {
100                    con.Close();
101                }
102
103                if (doredirect)
104                    Server.Transfer("Login.aspx");
105            }
106        }
107