Question

我是C＃的新手，我想在Access中插入一些Datagridview列，以便以后检索这些数据。

private void metroButton5_Click(object sender, EventArgs e)
try
{
    OleDbConnection connection = new OleDbConnection(@"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = F:\Database\DBAdatabase.accdb; Persist Security Info = False; ");
    for (int s = 0; s < dataGridView1.Rows.Count - 1; s++)

    {
        OleDbCommand command = new OleDbCommand(@"INSERT INTO Quotations (Position, LVPosition)VALUES('"+dataGridView1.Rows[s].Cells[0].Value+"','"+dataGridView1.Rows[s].Cells[1].Value+"')", connection);

        connection.Open();

        command.Connection = connection;
        command.ExecuteNonQuery();
        MessageBox.Show("Data Saved");

        connection.Close();
    }
}

catch (Exception ex)
{
    MessageBox.Show("Error   " + ex);
}

我变成“错误Systen.Data.OleDb.OleDbException（0x80040E14）：插入错误中的语法错误”。

有人可以帮我解决吗.....

非常感谢。

我也提到了此链接（https://www.youtube.com/watch?v=8hCfje5VL-0&ab_channel=codefactory2016），但是我找不到错误原因。

Answer 1

立即改变，我会改变

MessageBox.Show("Error   " + ex);

到

MessageBox.Show("Error   " + ex.Message);

它将使您对错误有更好的了解

此外，使用参数也是一种很好的做法，它可以防止单引号问题并防止sql注入问题：

        try
        {
            OleDbConnection connection = new OleDbConnection(@"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = F:\Database\DBAdatabase.accdb; Persist Security Info = False; ");
            OleDbCommand command = new OleDbCommand("", connection);
            for (int s = 0; s < dataGridView1.Rows.Count - 1; s++)
            {
                command.Parameters.AddWithValue("@position",dataGridView1.Rows[s].Cells[0].Value);
                command.Parameters.AddWithValue("@lvPosition",dataGridView1.Rows[s].Cells[1].Value);

                command.CommandText = "INSERT INTO Quotations (Position, LVPosition) VALUES (@position, @lvPosition)";

                connection.Open();

                //this line is not needed as it is set in the command constructor above
                //command.Connection = connection; 

                command.ExecuteNonQuery();
                MessageBox.Show("Data Saved");

                connection.Close();

                //edit - this needs to run or you will have duplicate values inserted
                command.Parameters.Clear(); 
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error   " + ex.Message);
        }

即使如此，我仍然会认真考虑对连接和命令使用语句，并尝试尝试打开连接。但这有点离题

一次插入datagridview的一些数据到Access数据库

1 个答案: