访问数据库插入不成功

Question

我正在尝试从文本框中向AccessDB插入一些数据。并且代码也成功运行，但是新数据未出现在数据库中所有数据类型或短文本

  try
  {
    OleDbConnection connection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=dsms.accdb");
    connection.Open();
      string Dcode = textDcode.Text;
      string Dname = textDname.Text;
      string Units = textDunit.Text;
      string Price = textDbuyp.Text;
      string BPrice = textDsellp.Text;
      string Category = textDcategory.Text;

      string my_querry = "INSERT INTO Drugs(Dcode, Dname, Units, Price, BPrice, Category)VALUES('"+Dcode+"','"+Dname+"','"+Units+"','"+Price+"','"+BPrice+"','"+Category+"')";

      OleDbCommand cmd = new OleDbCommand(my_querry, connection);
      cmd.ExecuteNonQuery();

      MessageBox.Show("Data saved successfully");
  }
  catch (Exception ex)
  {
      MessageBox.Show("Failed due to " + ex.Message);
  }
  finally
  {
      connection.Close();
  }

Answer 1

1）用实际值创建插入语句。为此，请在字段中放个休假[]

  string Dcode = textDcode.Text;
  string Dname = textDname.Text;
  string Units = textDunit.Text;
  string Price = textDbuyp.Text;
  string BPrice = textDsellp.Text;
  string Category = textDcategory.Text;
示例：

INSERT INTO Drugs(Dcode, Dname, Units, Price, BPrice, Category)VALUES('0001','nombre A','3','3454545','2453245','categoria A')
并使用这些值手动建立您的敏锐度。在数据库引擎中单独运行它。

2）确认您已从数据库控制台正确地插入表中。

3）正确插入句子后，请从c＃代码中进行设置，然后尝试从c＃中插入。示例：

 string my_querry = "INSERT INTO Drugs(Dcode, Dname, Units, Price, BPrice, Category)VALUES('0001','nombre A','3','3454545','2453245','categoria A')";
4）当c＃的插入有效时，用变量替换字段的值。示例：

 string my_querry = String.Format("INSERT INTO Drugs(Dcode, Dname, Units, Price, BPrice, Category)VALUES('{0}','{1}','{2}','{3}','{4}','{5}')",Dname, Units, Price, BPrice, Category) ;