为什么我的SQLite数据库被认为是只读的?

…当我尝试这样写入SQLite数据库时:

private async Task InsertMapRecord(string mapName, string mapNotes)
{
    path = folder.Path;
    connStr = string.Format(connStrBase, path);
    try
    {
        SqliteConnection conn = new SqliteConnection(connStr);
        String query = "INSERT INTO CartographerMain " +
            "(MapName, MapNotes) " +
            "VALUES (@MapName, @MapNotes)";

        using (SqliteCommand cmd = new SqliteCommand(query, conn))
        {
            cmd.Parameters.AddWithValue("@MapName", mapName);
            cmd.Parameters.AddWithValue("@MapNotes", mapNotes);
            await conn.OpenAsync();
            int result = await cmd.ExecuteNonQueryAsync();

            if (result < 0)
            {
                MessageDialog dialog = new MessageDialog("Error inserting data into CartographerMain");
                await dialog.ShowAsync();
            }
        }
    }
    catch (SqliteException sqlex)
    {
        string sqlExcMsg = string.Format("{0} Inner Exception: {1} Stack Trace: {2}", sqlex.Message,    sqlex.InnerException, sqlex.StackTrace);
        MessageDialog dialog = new MessageDialog(sqlExcMsg, "InsertMapRecord");
        await dialog.ShowAsync();
    }
}

所以,根据一些信息 here ,我检查了应用程序运行的文件夹。它被标记为只读,如下所示:

更新

在下面的评论中回答Selvin的问题,我存储db文件如下:

StorageFolder folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
string connStrBase = @"Data source={0}\Cartographer.db";
string connStr = string.Empty;
string path = string.Empty;

. . .

private async Task InsertMapRecord(string mapName, string mapNotes)
{
    path = folder.Path;
    connStr = string.Format(connStrBase, path);
    try
    {
        SqliteConnection conn = new SqliteConnection(connStr);
    . . .

我将数据库添加到项目中,将其Copy to Output Directory属性设置为“Copy if newer”

数据库文件的路径是C:\Users\bclay\source\repos\magratoryou\magratoryou\magratoryer.db。我手动复制到那里。