Question

每当我调用test（）方法时代码运行，直到它到达Messagebox.show（）当我尝试插入“vandute”表时，我收到错误“DATABASE IS LOCKED”

private void test()
    {
        int z;
        SQLiteConnection dbcon = new SQLiteConnection("Data Source=stefanauto.psa;Version=3;");
        dbcon.Open();
        using (SQLiteCommand sql = new SQLiteCommand(dbcon))
        {
            sql.CommandText = "select ID from clienti where CNP='" + cnp.Text + "'";

            z = Convert.ToInt32(sql.ExecuteScalar());


            MessageBox.Show(z.ToString());//The error begins after this line
            sql.CommandText = "insert into vandute(ID_MASINA,ID_CLIENT)values(1,2)";//Id_MASINA,ID-CLIENT ARE integers
            sql.ExecuteNonQuery();
        }
    }

请你解释一下我做错了什么？

Answer 1

尝试移动

dbcon.Open();

在using区块内。像

这样的东西

using (SQLiteConnection c = new SQLiteConnection("Data Source=stefanauto.psa;Version=3;"))
{
    c.Open();
    using (SQLiteCommand cmd = new SQLiteCommand(sql, c))
    {
        //your code
    }
}

或尝试明确处理您的连接

public void DisposeConnection()
{
    SQLiteConnection.Dispose();
    SQLiteCommand.Dispose();   
    GC.Collect();
}

Answer 2

尝试创建新命令;

node_modules/electron-prebuilt/dist/electron .

错误数据库锁定SQLite C＃

2 个答案: