代码不会添加到数据库

Question

出于某种原因，我的新纪录，我的形式保存，它不会添加到我的数据库的任何帮助，谢谢你们

有错误出现，我硝基甲苯没有如何解决它

如果那里有任何你需要让我知道，我会上传更多的东西，如果任何一个能够帮助

 double addCrd; 
     double addSav; 
     double addHomeLoan; 
     double addHomeRate; 


     bool CredOK = double.TryParse(creditBox.Text, out addCrd); 
     bool SavOK = double.TryParse(savingsBox.Text, out addSav); 
     bool HoloOK = double.TryParse(homeLoanBalanceBox.Text, out addHomeLoan); 
     bool HoRatOK = double.TryParse(homeLoanRateBox.Text, out addHomeRate); 
     bool exists = false; 

     foreach (Client client in records) 
     { 
      if (nameBox.Text == client.Name) 
      { 
       exists = true; 
      } 
     } 
     try 
     { 
      if (YesLoanRadio.Checked) 
      { 
       clientTypeBox.Text = "LC"; 
       if (exists == false) 
       { 
        if (!CredOK || !SavOK || !HoloOK || !HoRatOK) 
        { 
         MessageBox.Show("Invalid Data"); 
        } 
        else 
        { 
         Client add = new LoanClient(clientTypeBox.Text,MakeID(), nameBox.Text, suburbBox.Text, addCrd, addSav, addHomeLoan, addHomeRate); 
         records.Add(add); 
         sql_1 = "INSERT INTO Client VALUES ('LC'," + "'" + (records[position] as LoanClient).ID + "'" + "," + "'" + (records[position] as LoanClient).Name + "'" + "," + "'" + (records[position] as LoanClient).Suburb + "'" + "," + "'" + (records[position] as LoanClient).CreditBalance + "'" + "," + "'" + (records[position] as LoanClient).SavingsBalance + "'" + "," + "'" + (records[position] as LoanClient).HomeLoanBalance + "'" + "," + "'" + (records[position] as LoanClient).HomeLoanInterestRate + "')"; 
         showform(); 
         MessageBox.Show("User Added"); 
         position++; 
        } 
       } 
      } 
      else if (NoLoanRadio.Checked) 
      { 
       clientTypeBox.Text = "BC"; 
       if (exists == false) 
       { 
        if (!CredOK || !SavOK) 
        { 
         MessageBox.Show("Invalid Data"); 
        } 
        else 
        { 
         Client add = new Client(clientTypeBox.Text, MakeID(), nameBox.Text, suburbBox.Text, addCrd, addSav); 
         records.Add(add); 
         sql_1 = "INSERT INTO Client VALUES ('BC', '" + records[position].ID + "'" + "," + "'" + records[position].Name + "'" + "," + "'" + records[position].Suburb + "'" + "," + "'" + records[position].CreditBalance + "'" + "," + "'" + records[position].SavingsBalance + "','','')"; 
         showform(); 
         MessageBox.Show("User Added"); 
         position++; 
        } 
       } 
      } 
      else 
      { 
       MessageBox.Show("Please Select if you have a home Loan !!!!"); 
      } 
      try 
      { 
       DBQuery(sql_1); 
      } 
      catch (OleDbException e4) 
      { 
       MessageBox.Show(e4.ToString()); 
       records.Remove(records[position]); 
       position = records.Count - 1; 
      } 
     } 
     catch 
     { 
      MessageBox.Show("Invalid entry. You must enter a number value into Balance and Credit Used."); 
     } 

数据库查询方法的详细信息是

public void DBQuery(string sql) // changed static from public 
    { 
     try 
     { 
      conn.Open(); 
      OleDbCommand cmd = new OleDbCommand(sql, conn); 
      cmd.ExecuteNonQuery(); 

     } 
     catch (OleDbException e) 
     { 
      MessageBox.Show(e.ToString()); 
     } 
     conn.Close(); 
    } 

Answer 1

尝试SQL异常的代码......

catch (DbUpdateException ex) 
         { 
          var sqlex = ex.InnerException.InnerException as SqlException; 

          if (sqlex != null) 
          { 
           switch (sqlex.Number) 
           { 
            case 547: throw new ExNoExisteUsuario("No existe usuario destino."); //FK exception 
            case 2627: 
            case 2601: 
             throw new ExYaExisteConexion("Ya existe la conexion."); //primary key exception 

            default: throw sqlex; //otra excepcion que no controlo. 


           } 
          } 

          throw ex; 
         }