Question

试图将数据从一种形式移动到另一种形式，并且表格存在问题。是的，我发现这样的主题有误，并试图纠正自己，但出了点问题。

using (SqlConnection conn = new SqlConnection("Data Source=DESKTOP-R552818\\SQLEXPRESS;Initial Catalog=Fond;Integrated Security=True"))
{
    SqlDataAdapter comm = new SqlDataAdapter("INSERT INTO Pacient (Name, id_diagnoz, Surname, Middle_name, Column__Passport, Legal_address_Clinic, Age) " +
                "VALUES ('"+ tName.Text + "', (SELECT id_diagnoz FROM Diagnoz WHERE Name_diagnoz = '" + cbName.Text + "' and Stage = '" + cbStage.Text + "'), '" + tSurname.Text + "', '" + tMiddle.Text + "', '" + tPas.Text + "', '" + cbClinic.Text + "', '" + tAge.Text + "')", conn);
    conn.Open();

    DataSet ds = new DataSet();
    //ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
    comm.Fill(ds);

    Form1 form = new Form1();
    form.DataGrid.DataSource = ds.Tables[0]; //?
}

string connectionString = "Data Source=DESKTOP-R552818\\SQLEXPRESS;Initial Catalog=Fond;Integrated Security=True";
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                SqlTransaction transaction = connection.BeginTransaction();

                SqlCommand command = connection.CreateCommand();
                command.Transaction = transaction;

                try
                {                        
                    command.CommandText = "INSERT INTO Pacient (Name, id_diagnoz, Surname, Middle_name, Column__Passport, Legal_address_Clinic, Age) " +
                "VALUES ('" + metroTextBox1.Text + "', (SELECT id_diagnoz FROM Diagnoz WHERE Name_diagnoz = '" + metroComboBox1.Text + "' and Stage = '" + metroComboBox2.Text + "'), '" + metroTextBox2.Text + "', '" + metroTextBox3.Text + "', '" + maskedTextBox1.Text + "', '" + metroComboBox3.Text + "', '" + metroTextBox5.Text + "')";

                    command.ExecuteNonQuery();                        
                    transaction.Commit();
                    MessageBox.Show("Added");  
                   //here is a DataSet                                              
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                    transaction.Rollback();
                }

            }

Answer 1

您期望查询返回结果，但是您所做的只是INSERT语句。

要插入值，应使用ExecuteNonQuery（see this for reference）的SqlCommand方法。

然后，分配另一个命令：SELECT以获取结果，然后可以用结果填充DataSet，然后可以用它填充DataGridView。

也：您是向SQL注入的专家，请使用参数化查询来防止自己受到此类威胁（see this for reference）。

找不到其他形式的表0

1 个答案: