如何在SQLite C#中添加参数？

我正在使用WPF和SQLite，我想添加新的参数。我试过：

string _search;

private void txtSearchBox_TextChanged(object sender, TextChangedEventArgs e)
{
    _search = txtSearchBox.Text;
}

SQLiteConnection sqlite_conn = new SQLiteConnection("Data Source = music.db");
SQLiteCommand sqlite_cmd = new SQLiteCommand();

private void btn_search_Click(object sender, RoutedEventArgs e)
{
    sqlite_conn.Open();
    sqlite_cmd = sqlite_conn.CreateCommand();
    sqlite_cmd.CommandText = "select Title from Song where Title=@title";

    sqlite_cmd.Parameters.Add("@title",SqlDbType.NVarChar, -1);  // ************ //

    sqlite_cmd.Parameters["@title"].Value = _search;


    DataSet dataSet = new DataSet();
    SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter(sqlite_cmd.CommandText,sqlite_conn);
    dataAdapter.Fill(dataSet);

    datagrid.ItemsSource = dataSet.Tables[0].DefaultView;
}

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我在我勾选的线路上出错

/******/

。如何修复它？

我看不出有任何错误，只是您针对字符串类型列指定了负大小。宁可试一试

 sqlite_cmd.Parameters.Add("@title",SqlDbType.NVarChar, 30);

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始终逐字记录错误消息。