Question

我想与一个SQ数据库连接。请介绍一下《工作守则》。我还希望将数据网格与数据库联系起来。我使用这一守则,但并不工作:

private DataTable dt;
public Form1()
{
    InitializeComponent();
    this.dt = new DataTable();
}
private SQLiteConnection SQLiteConnection;
private void DataClass()
{
    SQLiteConnection = new SQLiteConnection("Data Source=PasswordManager.s3db;Version=3;");
}
private void GetData()
{
    SQLiteDataAdapter DataAdapter;
    try
    {
    SQLiteCommand cmd;
    SQLiteConnection.Open();  //Initiate connection to the db
    cmd = SQLiteConnection.CreateCommand();
    cmd.CommandText = "select*from PasswordManager;";  //set the passed query
    DataAdapter = new SQLiteDataAdapter(cmd);
    DataAdapter.Fill(dt); //fill the datasource
    dataGridView1.DataSource = dt;
}
catch(SQLiteException ex)
{
    //Add your exception code here.
}
SQLiteConnection.Close();

Answer 1

您可使用。系统.Data.SQLite ADO.NET提供商。一旦你下载并提到大会,它就非常简单。 NET代码:

using (var conn = new SQLiteConnection(@"Data Source=test.db3"))
using (var cmd = conn.CreateCommand())
{
    conn.Open();
    cmd.CommandText = "SELECT id FROM foo";
    using (var reader = cmd.ExecuteReader())
    {
        while (reader.Read())
        {
            int id = reader.GetInt32(reader.GetOrdinal("id"));
            ...
        }
    }
}

Answer 2

除了Darin提供的答复外,在Kumite(从我记得的角度来看)没有“准确的数据库”。当你启动“SQLiteConnection”时,如果某个数据库(db3)不存在,它就自动从那里创建......,那么你可以制作表格。

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