刪除數據庫表中的記錄

Question

單擊分配刪除記錄的按鈕時，我遇到了問題。 每當我單擊它時，它就會在消息框中顯示Microsoft Access數據庫引擎 ，但不會刪除該記錄。

這是我的代碼：

private void button1_Click(object sender, EventArgs e) {
    OleDbConnection conn = new OleDbConnection();
    conn.ConnectionString = (@ "Provider= Microsoft.ACE.OLEDB.12.0;Data Source =C:\Users\pc\Documents\Visual Studio 2015\Projects\GamefarmDB\GamefarmDB\Gamefarm.accdb;User ID = admin;Jet OLEDB:Database Password=admin; Persist Security Info=True;");

    String WingbandNumber = textBox1.Text;

    OleDbCommand cmd = new OleDbCommand("DELETE FROM List WHERE WingbandNumber ='" + WingbandNumber + "'", conn);

    conn.Open();
    if (conn.State == ConnectionState.Open) {
        cmd.Parameters.Add("@WingbandNumber", OleDbType.Numeric).Value = WingbandNumber;

        try {
            cmd.ExecuteNonQuery();
            MessageBox.Show("Data Deleted");
            conn.Close();
            this.Close();
        } catch (OleDbException ex) {
            MessageBox.Show(ex.Source);
            conn.Close();
        }
    } else {
        MessageBox.Show("Connection Failed");
    }
}

Answer 1

無論如何，我已經弄清楚了，謝謝您的幫助！ 我將數據庫命令更改為

("DELETE FROM List WHERE WingbandNumber =" + WingbandNumber, conn);