无法更新 Access 数据库 DataGridView

Question

我正在尝试以某种方式更新或重新检索来自Access数据库的数据(Random piece of data with column names)

我正在使用 Microsoft.ACE.OLEDB.12.0。

我创建了一个查询，该查询应该 return 记录列值介于两个日期之间的位置：

SQL 示例：

SELECT Arkusz1.ID, Arkusz1.Adres, Arkusz1.Umówione, Arkusz1.Data_umówienia, Arkusz1.Zakończone, Arkusz1.[Spisano?], Arkusz1.Notatki  
FROM Arkusz1 
WHERE( 
     ((Arkusz1.Umówione) = Yes) // or 1 or <> 0
 AND ((Arkusz1.Zakończone) = No)  // or 0 doesen't provide right answer
 AND ((Arkusz1.Data_umówienia) BETWEEN 24/07/2021 AND 26/07/2021) ) 
 ORDER BY Arkusz1.Data_umówienia;

我的代码：

void fillGrid()
{
    string teraz = DateTime.Today.AddDays(-1).ToShortDateString().Replace('.', '/');
    string jutro = DateTime.Today.AddDays(1).ToShortDateString().Replace('.', '/');
    // AddDays +-1 because of my data issue, that's not important

    string dzisiejsze = "SELECT Arkusz1.ID, Arkusz1.Adres, Arkusz1.Umówione, Arkusz1.Data_umówienia," 
        + " Arkusz1.Zakończone, Arkusz1.[Spisano?], Arkusz1.Notatki  FROM Arkusz1" 
        + " WHERE( ((Arkusz1.Umówione) = Yes) AND ((Arkusz1.Zakończone) = No) AND " 
        + "((Arkusz1.Data_umówienia) BETWEEN "
        + teraz + " AND " + jutro + ") )" 
        + " ORDER BY Arkusz1.Data_umówienia;";
        //selecting almost every column from my only sheet (Arkusz1), 
        //if Umówione (appointment is arranged) has True value AND issue is not ended (Zakończone) 
        //AND appointment date is between yesterday and tomorrow 
        //(as I said, that's all because my stupid ideas in creating DB)

    connection.Open();

    OleDbDataAdapter dataAdapter = new OleDbDataAdapter(dzisiejsze, connection);
    DataTable dt = new DataTable();
    dataAdapter.Fill(dt);
    TodaysPlan_dataGridView.DataSource = dt;
    TodaysPlan_dataGridView.Refresh();

    connection.Close();
}

我什至添加了一个特殊按钮来更新整个网格（首先它应该在第二个表单关闭后更新）：

private void refreshGrid_Click(object sender, EventArgs e)
{
    Application.DoEvents(); // because I saw something on stack, didn't work
    fillGrid(); //start filling again, didn't work too
    TodaysPlan_dataGridView.Refresh(); // same, didn't work
}

我没有收到任何错误，执行（即使在调试模式下）只是通过 refreshGrid_Click 中的代码。

Edit: Tried to execute that SQL code for random data, didn't work too Ofc 这不是我问题中最重要的部分，但我可以另外问 :)

我还将提供 从第二种形式保存按钮的代码，但我认为它不会真正有用：

private void save_button_Click(object sender, EventArgs e)
{
    if ((Tick_label.Visible == true) && (IDInfo_label.Text == "All good!") && (street_textBox.TextLength > 0))
    {
        connection.Open();
        string cmd_string = "INSERT INTO Arkusz1 (ID, Adres, Przydzielenie) VALUES ('" + ID_maskedTextBox.Text + "', '" + street_textBox.Text + "','" + startDate_dateTimePicker.Value + "')";
        OleDbCommand command = new OleDbCommand(cmd_string, connection);
        command.ExecuteNonQuery();
        connection.Close();

        this.DialogResult = DialogResult.OK;
        this.Close();
    }
    else
    {
        MessageBox.Show("error");
    }
}

这是我在Stack上的第一个问题，欢迎任何建议和建设性的批评！

顺便说一句，我正在使用 this YT 教程，希望它对某人有所帮助:)

Answer 1

好的，@Steve 和@Jimi 提供的信息非常有用，首先我使用 String.Format() 更改了字符串格式并解决了 SQL 问题 - 这是 (#date #)格式：

DateTime tmp_teraz = DateTime.Today.AddDays(-1);
string teraz = String.Format("{0}/{1}/{2}", tmp_teraz.Month.ToString(), 
tmp_teraz.Day.ToString(), tmp_teraz.Year.ToString());

DateTime tmp_jutro = DateTime.Today.AddDays(1);
string jutro = String.Format("{0}/{1}/{2}", tmp_jutro.Month.ToString(), tmp_jutro.Day.ToString(), tmp_jutro.Year.ToString());

string dzisiejsze = String.Format("SELECT Arkusz1.ID, Arkusz1.Adres, Arkusz1.Umówione, Arkusz1.Data_umówienia, Arkusz1.Zakończone, Arkusz1.[Spisano?], Arkusz1.Notatki  FROM Arkusz1 WHERE( ((Arkusz1.Umówione) = true) AND ((Arkusz1.Zakończone) = false) AND ((Arkusz1.Data_umówienia) " +
            "BETWEEN (#{0}#) AND (#{1}#)) ) ORDER BY Arkusz1.Data_umówienia;", teraz, jutro);

最后，网格看起来像 this。

使用 dataGrid 刷新或插入数据不起作用，但这是我会随着时间的推移开发的东西。

感谢您的帮助，祝大家愉快！

无法更新 Access 数据库 DataGridView

Cannot update Access Database DataGridView

c#

sql

datagridview

winforms

ms-access-2016