解密/密码SQLite进行查询

Question

我需要解锁受密码保护的SQLite文件添加数据，然后通过电子邮件发送受密码保护的文件，我的所有查询和电子邮件都可以正常工作，直到我使用数据库浏览器（SQLCipher）对该文件进行密码保护为止

我一直在GitHub SQLite-Net上关注此示例，该示例

var options = new SQLiteConnectionString(databasePath, true,
key: "password");
 var encryptedDb = new SQLiteAsyncConnection(options);

但是当我将var选项添加到SQLiteAsyncConnection时出现错误，错误提示

  

无法从SQLite.SQLiteConnectionString转换为String

    private async void pickPeriod()
    {
         List<string> periodArray = new List<string>();

        SQLitePCL.Batteries.Init();

        try
        {
            string fileName = "fieldnames5.sql";
            var databasePath = Path.Combine   (Windows.Storage.ApplicationData.Current.LocalFolder.Path, fileName);
            var options = new SQLiteConnectionString(databasePath,   true,   key: "Wi_Day!");
            var conn = new SQLiteAsyncConnection(options);
            {

                await conn.CreateTableAsync<storeNames>();

                try
                {


                    var periodNo = await conn.QueryAsync<storeNames>  ("SELECT Period FROM WkNos");
                    foreach (var period in periodNo)
                    {

                        string myresult = period.Period.ToString();


                        periodArray.Add(period.Period);


                        HashSet<string> set = new HashSet<string>(periodArray);
                        string[] result = new string[set.Count];
                        set.CopyTo(result);

                        periodArray.AddRange(result);

                    }
                    pdNumPick.Items.Clear();
                    pdNumPick.ItemsSource = periodArray;
                }
                catch
                {
                    pdNum.Text = "<-No Data->";
                }

            }
        }

        catch
        {
            Debug.WriteLine("File does not exits");

        }
    }

我只需要解锁SQLite文件并添加数据并重新锁定