c# - 使用 C# 通过单击按钮从 MS Access 数据库中删除数据

Question

我正在尝试通过单击按钮从数据库中删除数据，但我当前收到错误:

“System.Data.dll 中发生了类型为‘System.Data.OleDb.OleDbException’的未处理异常

其他信息:没有为一个或多个必需参数给出值。”

这是我的删除按钮代码:

private void btnDelete_Click(object sender, EventArgs e)
    {
        connect.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\Foundation Degree\Year 2\Chris Ovia\Assignment2\Assignment2\BookSellersDatabase.mdb";
        tempTitle = txtTitle.Text;
        connect.Open();
        OleDbCommand cmd = new OleDbCommand("DELETE FROM Book WHERE Title = tempTitle", connect);
        cmd.ExecuteNonQuery();
        MessageBox.Show("Data Deleted", "Deleted", MessageBoxButtons.OK, MessageBoxIcon.Information);
        connect.Close();

        //this.Refresh();
        //Application.DoEvents(); 
    }

Answer 1

删除查询应该是

OleDbCommand cmd = new OleDbCommand("DELETE FROM Book WHERE Title ='" +  tempTitle + "'", connect);